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v1.0.0
ICD-10 Guide
ICD-10 CodesM05.172

M05.172

Billable

Rheumatoid lung disease with rheumatoid arthritis of left ankle and foot

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

Code Description

ICD-10 M05.172 is a billable code used to indicate a diagnosis of rheumatoid lung disease with rheumatoid arthritis of left ankle and foot.

Key Diagnostic Point:

Rheumatoid lung disease is a serious complication of rheumatoid arthritis (RA), characterized by interstitial lung disease, pleuritis, or pulmonary nodules. In this condition, the immune system mistakenly attacks the synovial membranes, leading to inflammation and damage in joints, particularly affecting the left ankle and foot. Anatomically, the left ankle consists of the tibia, fibula, and talus, while the foot comprises multiple bones including the metatarsals and phalanges. Clinically, patients may present with joint swelling, pain, and stiffness in the left ankle and foot, alongside respiratory symptoms such as cough, dyspnea, or chest pain due to lung involvement. The pathophysiology involves autoimmune mechanisms leading to chronic inflammation, which can result in joint deformities and functional limitations, impacting mobility and quality of life.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Involvement of multiple body systems (musculoskeletal and respiratory)
  • Need for detailed documentation of joint involvement and severity
  • Potential for overlapping symptoms with other conditions
  • Complexity in treatment approaches requiring interdisciplinary care

Audit Risk Factors

  • Inadequate documentation of joint involvement and laterality
  • Failure to document the severity of lung disease
  • Misclassification of rheumatoid arthritis type
  • Lack of evidence for systemic involvement

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (X-rays, MRIs) to assess joint damage, functional assessments, and treatment plans.

Common Clinical Scenarios

Common scenarios include surgical interventions for joint deformities or severe pain management.

Billing Considerations

Documenting the specific joints involved and the degree of functional impairment is crucial for treatment planning.

Rheumatology

Documentation Requirements

Rheumatologic documentation must include laboratory tests for inflammation markers (e.g., ESR, CRP) and assessments of disease activity (e.g., DAS28).

Common Clinical Scenarios

Management of systemic symptoms and monitoring of disease progression are common scenarios.

Billing Considerations

Systemic involvement should be documented, including any pulmonary function tests or imaging of the lungs.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate mobility, strength, and the need for assistive devices.

Common Clinical Scenarios

Rehabilitation scenarios may include physical therapy for joint mobility and respiratory therapy for lung function.

Billing Considerations

Documenting mobility limitations and the impact on daily activities is essential for rehabilitation planning.

Coding Guidelines

Inclusion Criteria

Use M05.172 When
  • Follow official coding guidelines for laterality (left ankle and foot), severity of the condition, and the type of encounter (initial, follow
  • up, or exacerbation)
  • Ensure accurate documentation of all relevant clinical findings

Exclusion Criteria

Do NOT use M05.172 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, moderate complexity

Clinical Scenario

Used for follow-up visits assessing joint and lung function.

Documentation Requirements

Document history, examination findings, and treatment plans.

Specialty Considerations

Considerations for both orthopedic and rheumatologic evaluations.

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 in capturing the complexity of conditions like rheumatoid arthritis with systemic involvement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, particularly in capturing the complexity of conditions like rheumatoid arthritis with systemic involvement.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, particularly in capturing the complexity of conditions like rheumatoid arthritis with systemic involvement.

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 M05.172?

Key documentation includes detailed descriptions of joint involvement, severity of symptoms, and any systemic manifestations such as lung disease. Ensure to include imaging results and laboratory findings to support the diagnosis.