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ICD-10 Guide
ICD-10 CodesM02.372

M02.372

Billable

Reiter's disease, left ankle and foot

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

Code Description

ICD-10 M02.372 is a billable code used to indicate a diagnosis of reiter's disease, left ankle and foot.

Key Diagnostic Point:

Reiter's disease, also known as reactive arthritis, is a type of inflammatory arthritis that occurs as a reaction to an infection in another part of the body. It is characterized by the classic triad of arthritis, urethritis, and conjunctivitis. In the case of M02.372, the condition specifically affects the left ankle and foot. Anatomically, the left ankle consists of the tibia, fibula, and talus, while the foot includes multiple bones such as the metatarsals and phalanges. Pathophysiologically, Reiter's disease is believed to be triggered by an immune response to infections, commonly involving the urogenital or gastrointestinal tracts. Clinically, patients may present with swelling, pain, and stiffness in the left ankle and foot, often accompanied by systemic symptoms such as fever and malaise. Movement limitations can include reduced range of motion and difficulty bearing weight on the affected limb, impacting daily activities and quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of autoimmune mechanisms and triggers.
  • Involves specific anatomical localization (left ankle and foot).
  • Differentiation from other forms of arthritis is necessary.
  • Documentation of systemic symptoms and joint involvement is critical.

Audit Risk Factors

  • Inadequate documentation of joint involvement and laterality.
  • Failure to document the underlying infection that triggered the arthritis.
  • Misclassification of Reiter's disease as another type of arthritis.
  • Lack of evidence for systemic symptoms in the medical record.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Common scenarios include surgical interventions for severe joint damage or arthroscopy for diagnostic purposes.

Billing Considerations

Joint-specific considerations include the assessment of joint stability and the presence of enthesitis.

Rheumatology

Documentation Requirements

Rheumatologic documentation must include laboratory tests for inflammation markers (ESR, CRP) and disease activity scores.

Common Clinical Scenarios

Scenarios often involve managing flare-ups and adjusting immunosuppressive therapies.

Billing Considerations

Systemic involvement, such as skin lesions or ocular symptoms, should be documented to reflect the full extent of the disease.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate the patient's ability to perform activities of daily living and mobility.

Common Clinical Scenarios

Rehabilitation scenarios may include physical therapy to improve joint function and strength.

Billing Considerations

Documentation of assistive devices used for mobility and the impact of pain on rehabilitation outcomes is essential.

Coding Guidelines

Inclusion Criteria

Use M02.372 When
  • 10 coding guidelines for M02
  • 372 require accurate documentation of laterality (left), severity of symptoms, and the type of encounter (initial, follow
  • up, etc

Exclusion Criteria

Do NOT use M02.372 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 when joint swelling necessitates aspiration for diagnostic or therapeutic purposes.

Documentation Requirements

Document the joint involved, indication for the procedure, and any findings.

Specialty Considerations

Orthopedic and rheumatologic considerations include the need for imaging guidance in some cases.

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, enabling better tracking of disease prevalence and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling better tracking of disease prevalence and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling better tracking of disease prevalence 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 Reiter's disease?

Common symptoms include joint pain and swelling, particularly in the lower extremities, along with possible systemic symptoms such as fever, fatigue, and conjunctivitis.