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ICD-10 Guide
ICD-10 CodesM05.431

M05.431

Billable

Rheumatoid myopathy with rheumatoid arthritis of right wrist

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

Code Description

ICD-10 M05.431 is a billable code used to indicate a diagnosis of rheumatoid myopathy with rheumatoid arthritis of right wrist.

Key Diagnostic Point:

Rheumatoid myopathy is a condition characterized by muscle weakness and pain associated with rheumatoid arthritis (RA), an autoimmune disorder that primarily affects the joints. In this case, the right wrist is involved, indicating localized inflammation and damage due to RA. Anatomically, the wrist consists of eight carpal bones, ligaments, tendons, and muscles that facilitate movement. The inflammation in RA can lead to synovitis, joint erosion, and muscle atrophy due to disuse or direct inflammatory effects. Clinically, patients may present with pain, swelling, and reduced range of motion in the wrist, alongside systemic symptoms of RA such as fatigue and morning stiffness. The presence of myopathy complicates the clinical picture, as it may lead to additional functional limitations and necessitate a multidisciplinary approach to treatment, including physical therapy and medication management.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Involvement of multiple systems (musculoskeletal and neuromuscular)
  • Need for precise documentation of joint involvement and severity
  • Differentiation from other types of myopathy and arthritis
  • Potential for co-existing conditions that require additional coding

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity
  • Failure to capture the myopathy aspect of the condition
  • Misclassification of the condition as a different type of arthritis
  • Lack of supporting evidence for treatment plans

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (e.g., X-rays, MRIs) to assess joint damage, functional assessments to evaluate range of motion, and treatment plans detailing surgical or non-surgical interventions.

Common Clinical Scenarios

Common scenarios include surgical interventions for joint repair or replacement, management of tendon injuries, and rehabilitation post-surgery.

Billing Considerations

Joint-specific considerations include the assessment of joint stability, alignment, and the presence of deformities.

Rheumatology

Documentation Requirements

Rheumatologic documentation should include laboratory tests for inflammatory markers (e.g., ESR, CRP), disease activity scores, and assessments of systemic involvement.

Common Clinical Scenarios

Autoimmune and inflammatory scenarios often involve medication management, including DMARDs and biologics, and monitoring for side effects.

Billing Considerations

Systemic involvement may affect treatment decisions and requires documentation of extra-articular manifestations.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate mobility, strength, and endurance, along with rehabilitation needs tailored to the patient's condition.

Common Clinical Scenarios

Rehabilitation scenarios may include physical therapy for strength training and mobility enhancement, as well as occupational therapy for daily living activities.

Billing Considerations

Mobility limitations may necessitate the use of assistive devices, which should be documented for proper coding.

Coding Guidelines

Inclusion Criteria

Use M05.431 When
  • Official coding guidelines require accurate documentation of laterality (right wrist), severity of the condition, and the type of encounter (initial, follow
  • up, etc
  • Coders must ensure that all relevant aspects of the condition are captured to avoid undercoding or overcoding

Exclusion Criteria

Do NOT use M05.431 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

97001CPT Code

Physical therapy evaluation

Clinical Scenario

Used for initial assessment of functional limitations due to rheumatoid myopathy.

Documentation Requirements

Documentation should include a detailed assessment of strength, range of motion, and functional limitations.

Specialty Considerations

Considerations for physical therapy include the patient's overall health status and specific rehabilitation goals.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling coders to capture the nuances of conditions like rheumatoid myopathy more accurately. This specificity aids in better patient management and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling coders to capture the nuances of conditions like rheumatoid myopathy more accurately. This specificity aids in better patient management and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling coders to capture the nuances of conditions like rheumatoid myopathy more accurately. This specificity aids in better patient management and resource allocation.

Resources

Clinical References

  • •
    American College of Rheumatology Guidelines

Coding & Billing References

  • •
    American College of Rheumatology Guidelines

Frequently Asked Questions

What are the key documentation requirements for coding rheumatoid myopathy?

Key documentation requirements include detailed descriptions of joint involvement, severity of symptoms, results of imaging studies, and any functional assessments performed. It is also important to document the patient's treatment plan and response to therapy.