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ICD-10 Guide
ICD-10 CodesM05.15

M05.15

Billable

Rheumatoid lung disease with rheumatoid arthritis of hip

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

Code Description

ICD-10 M05.15 is a billable code used to indicate a diagnosis of rheumatoid lung disease with rheumatoid arthritis of hip.

Key Diagnostic Point:

Rheumatoid lung disease is a serious complication of rheumatoid arthritis (RA), characterized by interstitial lung disease, pleural effusions, and pulmonary nodules. The hip joint, a ball-and-socket joint formed by the acetabulum of the pelvis and the head of the femur, can be affected by RA, leading to synovitis, joint erosion, and functional impairment. Patients may present with joint pain, stiffness, and decreased range of motion in the hip, alongside respiratory symptoms such as cough, dyspnea, and chest discomfort due to lung involvement. The pathophysiology involves autoimmune-mediated inflammation affecting both the synovial tissue of the hip and lung parenchyma, leading to joint destruction and pulmonary complications. Clinical management often requires a multidisciplinary approach, including rheumatologic treatment for systemic disease and orthopedic interventions for joint preservation.

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 severity
  • Potential for overlapping symptoms with other conditions
  • Complexity in treatment approaches requiring interdisciplinary coordination

Audit Risk Factors

  • Inadequate documentation of lung involvement
  • Failure to specify laterality of hip involvement
  • Misclassification of severity of joint damage
  • Lack of evidence for systemic disease activity

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients requiring hip arthroplasty due to severe RA-related damage or those undergoing joint injections for pain management.

Billing Considerations

Documentation must reflect the severity of joint involvement and any surgical interventions performed.

Rheumatology

Documentation Requirements

Records of inflammatory markers (e.g., ESR, CRP), disease activity scores (e.g., DAS28), and treatment response.

Common Clinical Scenarios

Management of systemic symptoms alongside joint treatment, including DMARD therapy adjustments.

Billing Considerations

Monitoring for systemic manifestations and documenting any changes in lung function.

Physical Medicine

Documentation Requirements

Functional assessments including mobility evaluations and rehabilitation progress notes.

Common Clinical Scenarios

Patients undergoing physical therapy for hip mobility and respiratory rehabilitation.

Billing Considerations

Assessment of assistive devices and home modifications to improve patient mobility.

Coding Guidelines

Inclusion Criteria

Use M05.15 When
  • Coders must ensure accurate documentation of laterality (right/left hip), severity of joint involvement, and specify the encounter type (initial, follow
  • up, etc

Exclusion Criteria

Do NOT use M05.15 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 pain management in RA patients with hip involvement.

Documentation Requirements

Document joint location, amount of fluid aspirated, and any therapeutic agents injected.

Specialty Considerations

Orthopedic documentation must reflect the need for the procedure due to RA-related joint damage.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding, particularly for conditions like RA that have systemic implications. Coders must be diligent in capturing all aspects of the disease to ensure accurate billing and care management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding, particularly for conditions like RA that have systemic implications. Coders must be diligent in capturing all aspects of the disease to ensure accurate billing and care management.

Reimbursement & Billing Impact

billing and care management.

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 M05.15?

Key documentation includes clear evidence of rheumatoid lung disease, specific details about hip joint involvement, and any systemic symptoms. Inflammatory markers and imaging studies should also be included to support the diagnosis.