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ICD-10 Guide
ICD-10 CodesM02.359

M02.359

Billable

Reiter's disease, unspecified hip

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

Code Description

ICD-10 M02.359 is a billable code used to indicate a diagnosis of reiter's disease, unspecified hip.

Key Diagnostic Point:

Reiter's disease, also known as reactive arthritis, is a type of inflammatory arthritis that typically develops in response 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 unspecified hip involvement, the hip joint may exhibit swelling, pain, and reduced range of motion due to inflammation. Anatomically, the hip joint is a ball-and-socket joint formed by the acetabulum of the pelvis and the head of the femur, allowing for a wide range of motion. Pathophysiologically, Reiter's disease is associated with an autoimmune response triggered by infections, often involving the urogenital or gastrointestinal tract. Clinically, patients may present with unilateral or bilateral hip pain, stiffness, and difficulty with weight-bearing activities. The condition can lead to chronic joint damage if not managed appropriately, necessitating a comprehensive treatment approach that includes anti-inflammatory medications, physical therapy, and lifestyle modifications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of symptoms
  • Potential for overlapping symptoms with other arthritic conditions
  • Need for detailed documentation of joint involvement and functional limitations
  • Variability in treatment approaches based on patient response

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity
  • Failure to document associated symptoms or comorbidities
  • Misclassification of the condition due to overlapping symptoms
  • Lack of evidence for treatment efficacy in documentation

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 notes on the patient's range of motion.

Common Clinical Scenarios

Common scenarios include patients presenting with acute hip pain following a recent infection, requiring surgical intervention for joint debridement or arthroscopy.

Billing Considerations

Joint-specific considerations include the degree of inflammation, presence of effusion, and impact on weight-bearing activities.

Rheumatology

Documentation Requirements

Rheumatologic documentation should include laboratory tests for inflammatory markers (ESR, CRP), HLA-B27 antigen testing, and assessments of disease activity using validated scales.

Common Clinical Scenarios

Patients may present with systemic symptoms such as fever and malaise alongside joint pain, necessitating a comprehensive evaluation for autoimmune conditions.

Billing Considerations

Consideration of systemic involvement, such as ocular or genitourinary symptoms, is crucial for accurate diagnosis and treatment planning.

Physical Medicine

Documentation Requirements

Functional assessments should document the patient's ability to perform activities of daily living and any assistive devices used for mobility.

Common Clinical Scenarios

Rehabilitation scenarios may include post-acute care for patients recovering from severe flare-ups, focusing on restoring mobility and strength.

Billing Considerations

Mobility limitations should be clearly documented, including the need for physical therapy interventions and assistive devices.

Coding Guidelines

Inclusion Criteria

Use M02.359 When
  • 10 coding guidelines require specificity in documenting laterality (if applicable), severity of the condition, and the type of encounter (initial, follow
  • up, etc
  • Accurate coding also necessitates capturing any associated conditions or complications

Exclusion Criteria

Do NOT use M02.359 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 in the hip requiring drainage or corticosteroid injection.

Documentation Requirements

Documentation must include the indication for the procedure, joint involved, and any imaging guidance used.

Specialty Considerations

Orthopedic considerations include the need for imaging to assess joint effusion prior to 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, enabling better tracking of disease prevalence and treatment outcomes. This specificity is crucial for appropriate reimbursement and quality of care.

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. This specificity is crucial for appropriate reimbursement and quality of care.

Reimbursement & Billing Impact

reimbursement and quality of care.

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, ankles, and hips, along with possible systemic symptoms such as conjunctivitis and urethritis. Patients may also experience stiffness and reduced range of motion in affected joints.