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ICD-10 Guide
ICD-10 CodesM05.131

M05.131

Billable

Rheumatoid lung disease with rheumatoid arthritis of right wrist

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/12/2025

Code Description

ICD-10 M05.131 is a billable code used to indicate a diagnosis of rheumatoid lung disease with rheumatoid arthritis of right wrist.

Key Diagnostic Point:

Rheumatoid lung disease is a serious complication of rheumatoid arthritis (RA), characterized by interstitial lung disease, pleuritis, or pulmonary nodules. The right wrist involvement indicates that the synovial joints are affected, leading to inflammation, pain, and potential deformity. Anatomically, the wrist consists of eight carpal bones, which articulate with the radius and ulna, allowing for a wide range of motion. In RA, the immune system mistakenly attacks the synovial membrane, causing swelling and pain in the joints. Clinically, patients may present with joint stiffness, particularly in the morning, and systemic symptoms such as fatigue and weight loss. The presence of lung disease complicates the management of RA, as it may require additional treatments such as corticosteroids or immunosuppressants, which can further impact joint health.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Involvement of multiple body systems (musculoskeletal and respiratory)
  • Need for precise documentation of joint involvement and laterality
  • Potential for overlapping symptoms with other conditions
  • Complex treatment regimens that may affect coding

Audit Risk Factors

  • Inadequate documentation of lung disease severity
  • Failure to specify laterality of wrist involvement
  • Misclassification of joint involvement (e.g., not specifying right wrist)
  • Lack of supporting evidence for systemic manifestations

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports (X-rays, MRIs) showing joint erosion or deformity, functional assessments documenting range of motion and strength.

Common Clinical Scenarios

Patients requiring joint injections, surgical interventions for severe deformities, or joint replacements.

Billing Considerations

Documentation must reflect the severity of joint involvement and any functional limitations.

Rheumatology

Documentation Requirements

Lab results showing rheumatoid factor, anti-CCP antibodies, and inflammatory markers (ESR, CRP), along with assessments of disease activity (DAS28).

Common Clinical Scenarios

Management of RA flares, initiation of DMARD therapy, and monitoring for lung complications.

Billing Considerations

Systemic involvement must be documented, including any respiratory symptoms or imaging findings.

Physical Medicine

Documentation Requirements

Functional assessments including mobility evaluations, assistive device needs, and rehabilitation goals.

Common Clinical Scenarios

Patients undergoing physical therapy for joint mobility and strength restoration.

Billing Considerations

Focus on mobility limitations due to joint pain and lung disease, and the need for adaptive strategies.

Coding Guidelines

Inclusion Criteria

Use M05.131 When
  • Follow official coding guidelines for laterality (specifying right wrist), severity of lung disease, and encounter type (initial vs
  • follow
  • Ensure documentation supports the complexity of the condition

Exclusion Criteria

Do NOT use M05.131 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used for joint effusion management in the right wrist.

Documentation Requirements

Document joint effusion, procedure details, and post-procedure assessment.

Specialty Considerations

Orthopedic documentation must include imaging findings and functional assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 allows for greater specificity in coding, particularly for conditions like RA with systemic involvement, improving the accuracy of patient records and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 allows for greater specificity in coding, particularly for conditions like RA with systemic involvement, improving the accuracy of patient records and reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American College of Rheumatology Guidelines

Coding & Billing References

  • •
    American College of Rheumatology Guidelines

Frequently Asked Questions

What documentation is required for coding M05.131?

Documentation must include a clear diagnosis of rheumatoid arthritis, specific joint involvement (right wrist), and any lung disease manifestations. Lab results, imaging studies, and functional assessments should be included to support the complexity of the condition.