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ICD-10 Guide
ICD-10 CodesM05.359

M05.359

Billable

Rheumatoid heart disease with rheumatoid arthritis of unspecified hip

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

Code Description

ICD-10 M05.359 is a billable code used to indicate a diagnosis of rheumatoid heart disease with rheumatoid arthritis of unspecified hip.

Key Diagnostic Point:

Rheumatoid heart disease is a complication of rheumatoid arthritis (RA), characterized by inflammation of the heart tissues, which can lead to pericarditis, myocarditis, and valvular heart disease. The condition arises due to systemic inflammation associated with RA, affecting the cardiovascular system. The unspecified hip involvement indicates that the patient has rheumatoid arthritis affecting the hip joint, but the specific side (left or right) is not documented. Clinically, patients may present with joint pain, swelling, and stiffness in the hip, along with symptoms of heart disease such as chest pain, shortness of breath, or palpitations. Anatomically, the hip joint is a ball-and-socket joint formed by the acetabulum of the pelvis and the head of the femur, allowing for a wide range of motion. The inflammatory process in RA can lead to joint erosion, deformity, and functional limitations, impacting mobility and quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Involvement of multiple body systems (musculoskeletal and cardiovascular)
  • Need for precise documentation of joint involvement and laterality
  • Potential for systemic manifestations complicating treatment and coding
  • Variability in clinical presentation and severity of symptoms

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity
  • Failure to document systemic manifestations of rheumatoid arthritis
  • Misclassification of unspecified laterality leading to coding errors
  • Lack of supporting evidence for the diagnosis of rheumatoid heart disease

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (X-rays, MRIs) showing joint involvement, functional assessments, and any surgical interventions performed.

Common Clinical Scenarios

Patients may present with hip pain requiring joint injections or surgical interventions such as arthroplasty due to severe joint damage.

Billing Considerations

Documenting the severity of joint involvement is crucial, as it affects treatment options and coding.

Rheumatology

Documentation Requirements

Rheumatologic documentation must include laboratory tests (e.g., rheumatoid factor, anti-CCP antibodies), inflammation markers (ESR, CRP), and assessments of disease activity (DAS28).

Common Clinical Scenarios

Patients may experience flares of RA that exacerbate both joint and cardiac symptoms, requiring coordinated care.

Billing Considerations

Systemic involvement must be documented to justify the diagnosis of rheumatoid heart disease.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate mobility limitations, pain levels, and the need for assistive devices.

Common Clinical Scenarios

Rehabilitation scenarios may include physical therapy for joint mobility and cardiovascular rehabilitation for heart disease.

Billing Considerations

Mobility limitations due to joint involvement must be clearly documented to support rehabilitation needs.

Coding Guidelines

Inclusion Criteria

Use M05.359 When
  • Follow official coding guidelines for laterality (unspecified in this case), severity of the condition, and encounter type (initial vs
  • follow
  • Ensure that documentation supports the diagnosis and any associated conditions

Exclusion Criteria

Do NOT use M05.359 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, hip joint

Clinical Scenario

Used for joint aspiration in patients with RA-related hip pain.

Documentation Requirements

Document the indication for aspiration, joint fluid analysis, and any therapeutic interventions.

Specialty Considerations

Orthopedic considerations for joint health and rheumatologic implications for systemic disease management.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has increased specificity in coding for musculoskeletal conditions, allowing for better tracking of comorbidities like rheumatoid heart disease. Coders must be familiar with the nuances of the new codes to ensure accurate billing and reporting.

ICD-9 vs ICD-10

The transition to ICD-10 has increased specificity in coding for musculoskeletal conditions, allowing for better tracking of comorbidities like rheumatoid heart disease. Coders must be familiar with the nuances of the new codes to ensure accurate billing and reporting.

Reimbursement & Billing Impact

billing and reporting.

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 heart disease?

Key documentation requirements include clear identification of joint involvement, systemic manifestations of rheumatoid arthritis, laboratory results indicating inflammation, and any imaging studies that support the diagnosis of both rheumatoid arthritis and heart disease.