M04-M14
Medium Complexity

Inflammatory polyarthropathies

Primary Specialty: Rheumatology
Last Updated: 2025-09-09

ICD-10 Codes (200)

200 billable
0 category headers
M05
Billable
Rheumatoid arthritis with rheumatoid factor
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M05.0
Billable
Felty's syndrome
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M05.00
Billable
Felty's syndrome, unspecified site
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M05.01
Billable
Felty's syndrome, shoulder
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M05.011
Billable
Felty's syndrome, right shoulder
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M05.012
Billable
Felty's syndrome, left shoulder
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M05.019
Billable
Felty's syndrome, unspecified shoulder
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M05.02
Billable
Felty's syndrome, elbow
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M05.021
Billable
Felty's syndrome, right elbow
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M05.022
Billable
Felty's syndrome, left elbow
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M05.029
Billable
Felty's syndrome, unspecified elbow
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M05.03
Billable
Felty's syndrome, wrist
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M05.031
Billable
Felty's syndrome, right wrist
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M05.032
Billable
Felty's syndrome, left wrist
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M05.039
Billable
Felty's syndrome, unspecified wrist
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M05.04
Billable
Felty's syndrome, hand
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M05.041
Billable
Felty's syndrome, right hand
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M05.042
Billable
Felty's syndrome, left hand
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M05.049
Billable
Felty's syndrome, unspecified hand
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M05.05
Billable
Felty's syndrome, hip
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M05.051
Billable
Felty's syndrome, right hip
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M05.052
Billable
Felty's syndrome, left hip
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M05.059
Billable
Felty's syndrome, unspecified hip
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M05.06
Billable
Felty's syndrome, knee
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M05.061
Billable
Felty's syndrome, right knee
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M05.062
Billable
Felty's syndrome, left knee
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M05.069
Billable
Felty's syndrome, unspecified knee
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M05.07
Billable
Felty's syndrome, ankle and foot
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M05.071
Billable
Felty's syndrome, right ankle and foot
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M05.072
Billable
Felty's syndrome, left ankle and foot
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M05.079
Billable
Felty's syndrome, unspecified ankle and foot
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M05.09
Billable
Felty's syndrome, multiple sites
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M05.1
Billable
Rheumatoid lung disease with rheumatoid arthritis
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M05.10
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified site
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M05.11
Billable
Rheumatoid lung disease with rheumatoid arthritis of shoulder
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M05.111
Billable
Rheumatoid lung disease with rheumatoid arthritis of right shoulder
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M05.112
Billable
Rheumatoid lung disease with rheumatoid arthritis of left shoulder
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M05.119
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified shoulder
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M05.12
Billable
Rheumatoid lung disease with rheumatoid arthritis of elbow
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M05.121
Billable
Rheumatoid lung disease with rheumatoid arthritis of right elbow
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M05.122
Billable
Rheumatoid lung disease with rheumatoid arthritis of left elbow
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M05.129
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified elbow
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M05.13
Billable
Rheumatoid lung disease with rheumatoid arthritis of wrist
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M05.131
Billable
Rheumatoid lung disease with rheumatoid arthritis of right wrist
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M05.132
Billable
Rheumatoid lung disease with rheumatoid arthritis of left wrist
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M05.139
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified wrist
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M05.14
Billable
Rheumatoid lung disease with rheumatoid arthritis of hand
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M05.141
Billable
Rheumatoid lung disease with rheumatoid arthritis of right hand
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M05.142
Billable
Rheumatoid lung disease with rheumatoid arthritis of left hand
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M05.149
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified hand
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M05.15
Billable
Rheumatoid lung disease with rheumatoid arthritis of hip
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M05.151
Billable
Rheumatoid lung disease with rheumatoid arthritis of right hip
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M05.152
Billable
Rheumatoid lung disease with rheumatoid arthritis of left hip
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M05.159
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified hip
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M05.16
Billable
Rheumatoid lung disease with rheumatoid arthritis of knee
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M05.161
Billable
Rheumatoid lung disease with rheumatoid arthritis of right knee
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M05.162
Billable
Rheumatoid lung disease with rheumatoid arthritis of left knee
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M05.169
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified knee
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M05.17
Billable
Rheumatoid lung disease with rheumatoid arthritis of ankle and foot
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M05.171
Billable
Rheumatoid lung disease with rheumatoid arthritis of right ankle and foot
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M05.172
Billable
Rheumatoid lung disease with rheumatoid arthritis of left ankle and foot
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M05.179
Billable
Rheumatoid lung disease with rheumatoid arthritis of unspecified ankle and foot
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M05.19
Billable
Rheumatoid lung disease with rheumatoid arthritis of multiple sites
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M05.2
Billable
Rheumatoid vasculitis with rheumatoid arthritis
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M05.20
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified site
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M05.21
Billable
Rheumatoid vasculitis with rheumatoid arthritis of shoulder
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M05.211
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right shoulder
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M05.212
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left shoulder
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M05.219
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified shoulder
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M05.22
Billable
Rheumatoid vasculitis with rheumatoid arthritis of elbow
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M05.221
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right elbow
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M05.222
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left elbow
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M05.229
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified elbow
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M05.23
Billable
Rheumatoid vasculitis with rheumatoid arthritis of wrist
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M05.231
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right wrist
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M05.232
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left wrist
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M05.239
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified wrist
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M05.24
Billable
Rheumatoid vasculitis with rheumatoid arthritis of hand
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M05.241
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right hand
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M05.242
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left hand
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M05.249
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified hand
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M05.25
Billable
Rheumatoid vasculitis with rheumatoid arthritis of hip
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M05.251
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right hip
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M05.252
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left hip
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M05.259
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified hip
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M05.26
Billable
Rheumatoid vasculitis with rheumatoid arthritis of knee
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M05.261
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right knee
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M05.262
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left knee
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M05.269
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified knee
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M05.27
Billable
Rheumatoid vasculitis with rheumatoid arthritis of ankle and foot
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M05.271
Billable
Rheumatoid vasculitis with rheumatoid arthritis of right ankle and foot
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M05.272
Billable
Rheumatoid vasculitis with rheumatoid arthritis of left ankle and foot
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M05.279
Billable
Rheumatoid vasculitis with rheumatoid arthritis of unspecified ankle and foot
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M05.29
Billable
Rheumatoid vasculitis with rheumatoid arthritis of multiple sites
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M05.3
Billable
Rheumatoid heart disease with rheumatoid arthritis
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M05.30
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified site
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M05.31
Billable
Rheumatoid heart disease with rheumatoid arthritis of shoulder
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M05.311
Billable
Rheumatoid heart disease with rheumatoid arthritis of right shoulder
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M05.312
Billable
Rheumatoid heart disease with rheumatoid arthritis of left shoulder
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M05.319
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified shoulder
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M05.32
Billable
Rheumatoid heart disease with rheumatoid arthritis of elbow
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M05.321
Billable
Rheumatoid heart disease with rheumatoid arthritis of right elbow
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M05.322
Billable
Rheumatoid heart disease with rheumatoid arthritis of left elbow
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M05.329
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified elbow
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M05.33
Billable
Rheumatoid heart disease with rheumatoid arthritis of wrist
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M05.331
Billable
Rheumatoid heart disease with rheumatoid arthritis of right wrist
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M05.332
Billable
Rheumatoid heart disease with rheumatoid arthritis of left wrist
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M05.339
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified wrist
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M05.34
Billable
Rheumatoid heart disease with rheumatoid arthritis of hand
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M05.341
Billable
Rheumatoid heart disease with rheumatoid arthritis of right hand
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M05.342
Billable
Rheumatoid heart disease with rheumatoid arthritis of left hand
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M05.349
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified hand
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M05.35
Billable
Rheumatoid heart disease with rheumatoid arthritis of hip
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M05.351
Billable
Rheumatoid heart disease with rheumatoid arthritis of right hip
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M05.352
Billable
Rheumatoid heart disease with rheumatoid arthritis of left hip
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M05.359
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified hip
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M05.36
Billable
Rheumatoid heart disease with rheumatoid arthritis of knee
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M05.361
Billable
Rheumatoid heart disease with rheumatoid arthritis of right knee
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M05.362
Billable
Rheumatoid heart disease with rheumatoid arthritis of left knee
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M05.369
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified knee
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M05.37
Billable
Rheumatoid heart disease with rheumatoid arthritis of ankle and foot
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M05.371
Billable
Rheumatoid heart disease with rheumatoid arthritis of right ankle and foot
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M05.372
Billable
Rheumatoid heart disease with rheumatoid arthritis of left ankle and foot
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M05.379
Billable
Rheumatoid heart disease with rheumatoid arthritis of unspecified ankle and foot
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M05.39
Billable
Rheumatoid heart disease with rheumatoid arthritis of multiple sites
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M05.4
Billable
Rheumatoid myopathy with rheumatoid arthritis
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M05.40
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified site
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M05.41
Billable
Rheumatoid myopathy with rheumatoid arthritis of shoulder
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M05.411
Billable
Rheumatoid myopathy with rheumatoid arthritis of right shoulder
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M05.412
Billable
Rheumatoid myopathy with rheumatoid arthritis of left shoulder
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M05.419
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified shoulder
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M05.42
Billable
Rheumatoid myopathy with rheumatoid arthritis of elbow
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M05.421
Billable
Rheumatoid myopathy with rheumatoid arthritis of right elbow
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M05.422
Billable
Rheumatoid myopathy with rheumatoid arthritis of left elbow
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M05.429
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified elbow
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M05.43
Billable
Rheumatoid myopathy with rheumatoid arthritis of wrist
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M05.431
Billable
Rheumatoid myopathy with rheumatoid arthritis of right wrist
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M05.432
Billable
Rheumatoid myopathy with rheumatoid arthritis of left wrist
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M05.439
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified wrist
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M05.44
Billable
Rheumatoid myopathy with rheumatoid arthritis of hand
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M05.441
Billable
Rheumatoid myopathy with rheumatoid arthritis of right hand
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M05.442
Billable
Rheumatoid myopathy with rheumatoid arthritis of left hand
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M05.449
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified hand
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M05.45
Billable
Rheumatoid myopathy with rheumatoid arthritis of hip
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M05.451
Billable
Rheumatoid myopathy with rheumatoid arthritis of right hip
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M05.452
Billable
Rheumatoid myopathy with rheumatoid arthritis of left hip
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M05.459
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified hip
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M05.46
Billable
Rheumatoid myopathy with rheumatoid arthritis of knee
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M05.461
Billable
Rheumatoid myopathy with rheumatoid arthritis of right knee
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M05.462
Billable
Rheumatoid myopathy with rheumatoid arthritis of left knee
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M05.469
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified knee
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M05.47
Billable
Rheumatoid myopathy with rheumatoid arthritis of ankle and foot
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M05.471
Billable
Rheumatoid myopathy with rheumatoid arthritis of right ankle and foot
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M05.472
Billable
Rheumatoid myopathy with rheumatoid arthritis of left ankle and foot
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M05.479
Billable
Rheumatoid myopathy with rheumatoid arthritis of unspecified ankle and foot
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M05.49
Billable
Rheumatoid myopathy with rheumatoid arthritis of multiple sites
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M05.5
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis
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M05.50
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified site
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M05.51
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of shoulder
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M05.511
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right shoulder
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M05.512
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left shoulder
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M05.519
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified shoulder
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M05.52
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of elbow
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M05.521
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right elbow
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M05.522
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left elbow
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M05.529
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified elbow
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M05.53
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of wrist
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M05.531
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right wrist
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M05.532
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left wrist
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M05.539
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified wrist
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M05.54
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of hand
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M05.541
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right hand
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M05.542
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left hand
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M05.549
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified hand
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M05.55
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of hip
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M05.551
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right hip
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M05.552
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left hip
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M05.559
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified hip
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M05.56
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of knee
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M05.561
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right knee
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M05.562
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left knee
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M05.569
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified knee
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M05.57
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of ankle and foot
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M05.571
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of right ankle and foot
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M05.572
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of left ankle and foot
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M05.579
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified ankle and foot
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M05.59
Billable
Rheumatoid polyneuropathy with rheumatoid arthritis of multiple sites
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M05.6
Billable
Rheumatoid arthritis with involvement of other organs and systems
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M05.60
Billable
Rheumatoid arthritis of unspecified site with involvement of other organs and systems
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M05.61
Billable
Rheumatoid arthritis of shoulder with involvement of other organs and systems
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M05.611
Billable
Rheumatoid arthritis of right shoulder with involvement of other organs and systems
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M05.612
Billable
Rheumatoid arthritis of left shoulder with involvement of other organs and systems
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M05.619
Billable
Rheumatoid arthritis of unspecified shoulder with involvement of other organs and systems
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M05.62
Billable
Rheumatoid arthritis of elbow with involvement of other organs and systems
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M05.621
Billable
Rheumatoid arthritis of right elbow with involvement of other organs and systems
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M05.622
Billable
Rheumatoid arthritis of left elbow with involvement of other organs and systems
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M05.629
Billable
Rheumatoid arthritis of unspecified elbow with involvement of other organs and systems
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M05.63
Billable
Rheumatoid arthritis of wrist with involvement of other organs and systems
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M05.631
Billable
Rheumatoid arthritis of right wrist with involvement of other organs and systems
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M05.632
Billable
Rheumatoid arthritis of left wrist with involvement of other organs and systems
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Updates & Changes

FY 2026 Updates

Current Year

Deleted Codes

No codes deleted in this range for FY 2026

No significant changes for FY 2026

This range maintains stability with current coding practices

Historical Changes

  • •FY 2025: Routine maintenance updates with minor terminology clarifications
  • •FY 2024: Enhanced specificity requirements for certain code ranges
  • •FY 2023: Updated documentation guidelines for improved clarity

Upcoming Changes

  • •Proposed updates pending review by Coordination and Maintenance Committee
  • •Under consideration: Enhanced digital health integration codes

Implementation Guidance

  • •Review all FY 2026 updates for M04-M14 codes before implementation
  • •Always verify the most current codes in the ICD-10-CM manual
  • •Ensure clinical documentation supports the selected diagnosis codes
  • +3 more guidance items...

Range Overview

high priority

The ICD-10 code range M04-M14 pertains to Inflammatory polyarthropathies, a group of diseases characterized by inflammation of multiple joints. These codes are used to classify conditions like rheumatoid arthritis, juvenile arthritis, and gout. The codes provide specific details about the type of polyarthropathy, the affected joints, and the disease's activity level.

Key Usage Points:

  • •M04-M14 codes are used for patients with confirmed diagnoses of inflammatory polyarthropathies.
  • •The codes specify the type of polyarthropathy, the affected joints, and the disease's activity level.
  • •M04-M14 codes are not used for patients with suspected but not confirmed polyarthropathies.
  • •The codes must be supported by appropriate clinical documentation.
  • •M04-M14 codes should be updated if the disease's activity level changes.

Coding Guidelines

When to Use:

  • ✓When a patient has a confirmed diagnosis of an inflammatory polyarthropathy.
  • ✓When the patient's condition has changed, such as a change in the disease's activity level.
  • ✓When a patient has multiple affected joints.
  • ✓When a patient has a specific type of polyarthropathy, such as rheumatoid arthritis or gout.

When NOT to Use:

  • ✗When a patient has a suspected but not confirmed polyarthropathy.
  • ✗When a patient has a non-inflammatory joint disease.
  • ✗When a patient has a single affected joint.
  • ✗When a patient has a condition that is better represented by another code.

Code Exclusions

Always verify exclusions with the patient's clinical documentation and the ICD-10 guidelines.

Documentation Requirements

Documentation for M04-M14 codes should include the type of polyarthropathy, the affected joints, and the disease's activity level. It should also include supporting evidence such as lab results, imaging studies, and clinical notes.

Clinical Information:

  • •Type of polyarthropathy
  • •Affected joints
  • •Disease activity level
  • •Clinical symptoms
  • •Treatment plan

Supporting Evidence:

  • •Lab results
  • •Imaging studies
  • •Clinical notes
  • •Physician's observations
Good Documentation Example:

Patient diagnosed with rheumatoid arthritis affecting multiple joints. Disease is currently active. Treatment plan includes methotrexate and physical therapy.

Poor Documentation Example:

Patient has joint pain.

Common Documentation Errors:

  • âš Not specifying the type of polyarthropathy
  • âš Not specifying the affected joints
  • âš Not specifying the disease activity level
  • âš Not including supporting evidence

Range Statistics

Total Codes
200
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:13

Coding Complexity

Medium
Complexity Rating

Coding for inflammatory polyarthropathies is of medium complexity due to the need to accurately identify the type of polyarthropathy, the affected joints, and the disease activity level. Coders must also interpret supporting evidence and update codes as the patient's condition changes.

Key Factors:
  • â–¸Determining the type of polyarthropathy
  • â–¸Identifying the affected joints
  • â–¸Assessing the disease activity level
  • â–¸Interpreting supporting evidence
  • â–¸Updating codes as the patient's condition changes

Specialty Focus

M04-M14 codes are primarily used by rheumatologists, but may also be used by primary care physicians and orthopedic surgeons.

Primary Specialties:
Rheumatology
60%
Primary Care
30%
Orthopedic Surgery
10%
Clinical Scenarios:
  • • A patient with rheumatoid arthritis affecting multiple joints.
  • • A patient with gout affecting the big toe.
  • • A patient with juvenile arthritis affecting the knees.
  • • A patient with ankylosing spondylitis affecting the spine.
  • • A patient with psoriatic arthritis affecting the hands and feet.

Resources & References

Resources for M04-M14 codes include the ICD-10 guidelines, clinical reference books, and educational materials from professional coding organizations.

Official Guidelines:

  • ICD-10 guidelines
  • World Health Organization's International Classification of Diseases
  • American Health Information Management Association's Coding Clinic

Clinical References:

  • Rheumatology textbooks
  • Clinical journals

Educational Materials:

  • American Academy of Professional Coders' ICD-10 training
  • American Health Information Management Association's ICD-10 training

Frequently Asked Questions

Can M04-M14 codes be used for suspected polyarthropathies?

No, M04-M14 codes should only be used for confirmed diagnoses of inflammatory polyarthropathies.