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ICD-10 Guide
ICD-10 CodesM05.37

M05.37

Billable

Rheumatoid heart disease with rheumatoid arthritis of ankle and foot

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

Code Description

ICD-10 M05.37 is a billable code used to indicate a diagnosis of rheumatoid heart disease with rheumatoid arthritis of ankle and foot.

Key Diagnostic Point:

Rheumatoid heart disease is a complication of rheumatoid arthritis (RA), an autoimmune disorder characterized by chronic inflammation of the joints. In this condition, the immune system mistakenly attacks the synovial membrane, leading to joint swelling, pain, and eventual joint damage. The ankle and foot joints are commonly affected, resulting in significant mobility limitations. Anatomically, the ankle consists of the tibia, fibula, and talus, while the foot comprises multiple bones including the metatarsals and phalanges. Rheumatoid heart disease can manifest as pericarditis, myocarditis, or valvular heart disease, complicating the clinical picture. Patients may present with symptoms such as joint pain, swelling, fatigue, and cardiovascular symptoms like chest pain or dyspnea. The interplay between joint and heart involvement necessitates a comprehensive approach to treatment, including disease-modifying antirheumatic drugs (DMARDs) and possibly surgical interventions for severe joint damage.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Involvement of multiple body systems (musculoskeletal and cardiovascular)
  • Need for detailed documentation of joint involvement and severity
  • Potential for overlapping symptoms with other conditions
  • Complexity in treatment regimens and monitoring

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity
  • Failure to capture systemic manifestations of rheumatoid arthritis
  • Misclassification of heart disease severity
  • Inconsistent use of codes for related conditions

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports (X-rays, MRIs) and functional assessments of the ankle and foot joints.

Common Clinical Scenarios

Patients requiring surgical intervention for joint deformities or severe pain.

Billing Considerations

Documentation of joint range of motion, deformities, and impact on daily activities.

Rheumatology

Documentation Requirements

Inflammatory markers (e.g., ESR, CRP) and assessments of disease activity (e.g., DAS28 score).

Common Clinical Scenarios

Management of systemic symptoms and coordination of care with cardiology.

Billing Considerations

Monitoring for cardiovascular complications and adjusting treatment based on systemic involvement.

Physical Medicine

Documentation Requirements

Functional assessments, rehabilitation goals, and progress notes on mobility.

Common Clinical Scenarios

Rehabilitation post-surgery or during flare-ups of rheumatoid arthritis.

Billing Considerations

Assessment of assistive devices and home modifications for improved mobility.

Coding Guidelines

Inclusion Criteria

Use M05.37 When
  • Coders must ensure accurate documentation of laterality (right/left), severity of joint involvement, and the type of encounter (initial, follow
  • up, etc

Exclusion Criteria

Do NOT use M05.37 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 swelling and pain management in RA patients.

Documentation Requirements

Indication for procedure, joint involved, and response to previous treatments.

Specialty Considerations

Orthopedic and rheumatologic documentation must align for accurate coding.

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, particularly those with systemic involvement, improving the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, particularly those with systemic involvement, improving the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

reimbursement.

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 M05.37?

Key documentation includes detailed descriptions of joint involvement, severity assessments, systemic symptoms, and treatment plans. Ensure that all relevant clinical findings are recorded to support the coding.