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ICD-10 Guide
ICD-10 CodesM05.362

M05.362

Billable

Rheumatoid heart disease with rheumatoid arthritis of left knee

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

Code Description

ICD-10 M05.362 is a billable code used to indicate a diagnosis of rheumatoid heart disease with rheumatoid arthritis of left knee.

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 potential joint destruction. The left knee is commonly affected, presenting with pain, stiffness, and reduced range of motion. Anatomically, the knee joint comprises the femur, tibia, fibula, and patella, surrounded by ligaments, tendons, and synovial fluid. Rheumatoid heart disease can manifest as pericarditis, myocarditis, or valvular heart disease, complicating the clinical picture. Patients may experience symptoms such as chest pain, shortness of breath, and fatigue, which can overlap with musculoskeletal symptoms. The interplay between joint and cardiac involvement necessitates a comprehensive approach to diagnosis and management, including imaging studies and laboratory tests to assess inflammation and cardiac function.

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 complicating diagnosis
  • Requirement for interdisciplinary collaboration in treatment

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity
  • Failure to capture systemic manifestations of rheumatoid arthritis
  • Misclassification of laterality or joint specificity
  • Lack of supporting evidence for the diagnosis of rheumatoid heart disease

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports (X-rays, MRIs) and functional assessments (range of motion, strength testing) are essential for orthopedic documentation.

Common Clinical Scenarios

Patients may present with severe knee pain requiring surgical intervention, such as arthroscopy or knee replacement.

Billing Considerations

Documenting the severity of joint damage and functional limitations is crucial for treatment planning.

Rheumatology

Documentation Requirements

Rheumatologic documentation should include lab results for inflammatory markers (e.g., ESR, CRP) and assessments of disease activity (e.g., DAS28).

Common Clinical Scenarios

Patients may experience flares of RA with systemic symptoms, necessitating adjustments in therapy.

Billing Considerations

Monitoring for systemic involvement, including cardiac assessments, is critical for comprehensive care.

Physical Medicine

Documentation Requirements

Functional assessments, including mobility evaluations and rehabilitation needs, must be documented.

Common Clinical Scenarios

Patients may require physical therapy for joint rehabilitation and mobility restoration.

Billing Considerations

Identifying assistive device needs and mobility limitations is essential for effective rehabilitation.

Coding Guidelines

Inclusion Criteria

Use M05.362 When
  • Coders must ensure accurate documentation of laterality (left knee), severity of joint involvement, and the encounter type (initial, follow
  • up, etc
  • ) to comply with official coding guidelines

Exclusion Criteria

Do NOT use M05.362 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 left knee.

Documentation Requirements

Document the indication for the procedure, joint involved, and any imaging guidance used.

Specialty Considerations

Orthopedic and rheumatologic considerations for joint management.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has increased specificity in coding musculoskeletal conditions, allowing for better tracking of disease progression and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has increased specificity in coding musculoskeletal conditions, allowing for better tracking of disease progression and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has increased specificity in coding musculoskeletal conditions, allowing for better tracking of disease progression and treatment outcomes.

Resources

Clinical References

  • •
    American College of Rheumatology Guidelines

Coding & Billing References

  • •
    American College of Rheumatology Guidelines

Frequently Asked Questions

What are the common symptoms of rheumatoid heart disease?

Common symptoms include chest pain, shortness of breath, fatigue, and palpitations, which may overlap with musculoskeletal symptoms like joint pain and stiffness.