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ICD-10 Guide
ICD-10 CodesM02.39

M02.39

Billable

Reiter's disease, multiple sites

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

Code Description

ICD-10 M02.39 is a billable code used to indicate a diagnosis of reiter's disease, multiple sites.

Key Diagnostic Point:

Reiter's disease, also known as reactive arthritis, is an inflammatory condition that typically arises following an infection, most commonly of the urogenital or gastrointestinal tract. It is characterized by a triad of symptoms: arthritis, urethritis, and conjunctivitis. Anatomically, the disease primarily affects the joints, particularly the knees, ankles, and feet, leading to swelling, pain, and stiffness. The pathophysiology involves an autoimmune response triggered by the initial infection, resulting in inflammation of the synovial membranes and subsequent joint damage. Clinically, patients may present with asymmetric oligoarthritis, which can affect multiple sites, and may also experience enthesitis (inflammation at tendon insertion sites) and dactylitis (swelling of fingers or toes). The condition can lead to significant functional impairment and movement limitations, particularly in weight-bearing joints, impacting daily activities and quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Varied clinical presentation with multiple joint involvement
  • Potential for systemic manifestations beyond musculoskeletal symptoms
  • Need for differentiation from other inflammatory arthritides
  • Documentation of prior infections and their relation to symptoms

Audit Risk Factors

  • Inadequate documentation of prior infections
  • Failure to specify joint involvement and laterality
  • Misclassification of reactive arthritis as primary arthritis
  • 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 to evaluate mobility, and detailed descriptions of joint involvement.

Common Clinical Scenarios

Common scenarios include patients presenting with acute knee pain following a gastrointestinal infection, requiring joint aspiration or injection.

Billing Considerations

Joint-specific considerations include the need to document the severity of joint swelling and range of motion limitations.

Rheumatology

Documentation Requirements

Rheumatologic documentation must include laboratory tests for inflammatory markers (ESR, CRP), HLA-B27 testing, and assessments of disease activity.

Common Clinical Scenarios

Patients may present with a history of urethritis and subsequent joint pain, necessitating a comprehensive evaluation of systemic involvement.

Billing Considerations

Consideration of extra-articular manifestations, such as skin lesions or ocular symptoms, is crucial for complete documentation.

Physical Medicine

Documentation Requirements

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

Common Clinical Scenarios

Rehabilitation scenarios may involve patients recovering from acute arthritis flare-ups, focusing on restoring range of motion and strength.

Billing Considerations

Documentation should reflect the impact of joint involvement on daily activities and the need for adaptive strategies.

Coding Guidelines

Inclusion Criteria

Use M02.39 When
  • 10 coding guidelines for M02
  • 39 require specificity in documenting the number of joints involved, laterality (if applicable), and the type of encounter (initial, follow
  • up, etc

Exclusion Criteria

Do NOT use M02.39 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 patients with significant joint effusion due to Reiter's disease.

Documentation Requirements

Document the joint involved, the amount of fluid aspirated, and the patient's response.

Specialty Considerations

Orthopedic considerations include the need for imaging to guide the procedure.

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 knees and ankles, along with possible conjunctivitis and urethritis. Patients may also experience dactylitis and enthesitis.