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ICD-10 Guide
ICD-10 CodesM02.37

M02.37

Billable

Reiter's disease, ankle and foot

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

Code Description

ICD-10 M02.37 is a billable code used to indicate a diagnosis of reiter's disease, ankle and foot.

Key Diagnostic Point:

Reiter's disease, also known as reactive arthritis, is a type of inflammatory arthritis that develops in response to an infection in another part of the body. It primarily affects the joints, particularly in the lower extremities, including the ankle and foot. Anatomically, the ankle joint comprises the tibia, fibula, and talus, while the foot consists of multiple bones including the metatarsals and phalanges. Clinically, Reiter's disease is characterized by a triad of symptoms: arthritis, urethritis, and conjunctivitis. Patients may present with swelling, pain, and stiffness in the ankle and foot joints, often leading to significant movement limitations. The pathophysiology involves an autoimmune response triggered by infections, commonly urogenital or gastrointestinal, leading to inflammation in the joints. Diagnosis is based on clinical presentation, history of preceding infections, and exclusion of other arthritic conditions. Treatment typically includes NSAIDs, corticosteroids, and disease-modifying antirheumatic drugs (DMARDs) to manage inflammation and pain.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of autoimmune mechanisms and inflammatory processes.
  • Involves multiple joint assessments and potential systemic implications.
  • Differentiation from other types of arthritis is necessary.
  • Documentation must capture both acute and chronic manifestations.

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity.
  • Failure to document prior infections that may have triggered the condition.
  • Misclassification of Reiter's disease as other types of arthritis.
  • Lack of follow-up documentation on treatment response.

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

Patients may require surgical intervention for severe joint damage or persistent symptoms unresponsive to conservative management.

Billing Considerations

Documentation should specify which joints are affected and the severity of involvement, as this impacts treatment decisions.

Rheumatology

Documentation Requirements

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

Common Clinical Scenarios

Patients may present with systemic symptoms, necessitating a comprehensive evaluation of joint and extra-articular manifestations.

Billing Considerations

Consideration of potential systemic involvement, such as skin or eye symptoms, is crucial for accurate diagnosis and management.

Physical Medicine

Documentation Requirements

Functional assessments should detail the patient's mobility limitations and rehabilitation needs, including any assistive devices required.

Common Clinical Scenarios

Rehabilitation may focus on restoring function and managing pain through physical therapy and exercise programs.

Billing Considerations

Documentation should reflect the impact of the disease on daily activities and quality of life.

Coding Guidelines

Inclusion Criteria

Use M02.37 When
  • 10 coding guidelines for M02
  • 37 require documentation of laterality (right, left, bilateral) and severity of the condition
  • Encounter type (initial, subsequent, sequela) must also be clearly documented to ensure accurate coding

Exclusion Criteria

Do NOT use M02.37 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 swelling and pain management in Reiter's disease.

Documentation Requirements

Document the joint involved, indication for the procedure, and any therapeutic agents 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 allowed for greater specificity in coding musculoskeletal conditions, including Reiter's disease, 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, including Reiter's disease, 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, including Reiter's disease, 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 ankles and feet, along with possible urethritis and conjunctivitis. Patients may also experience stiffness and reduced range of motion in affected joints.