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v1.0.0
ICD-10 Guide
ICD-10 CodesM02.859

M02.859

Billable

Other reactive arthropathies, unspecified hip

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

Code Description

ICD-10 M02.859 is a billable code used to indicate a diagnosis of other reactive arthropathies, unspecified hip.

Key Diagnostic Point:

Reactive arthropathies are inflammatory joint conditions that arise secondary to infections or other systemic diseases, often affecting the hip joint. The hip, a ball-and-socket joint formed by the acetabulum of the pelvis and the head of the femur, allows for a wide range of motion. In cases of reactive arthropathy, the inflammation can lead to pain, swelling, and stiffness, significantly impacting mobility. Clinically, patients may present with unilateral or bilateral hip pain, often accompanied by systemic symptoms such as fever or malaise, depending on the underlying trigger. The pathophysiology involves an immune response to an infection or antigenic stimulus, leading to synovial inflammation and joint effusion. Diagnosis typically requires a thorough clinical evaluation, imaging studies, and laboratory tests to rule out other conditions. The clinical presentation may vary, with some patients experiencing acute onset while others may have a more insidious course. Treatment often includes anti-inflammatory medications, physical therapy, and in some cases, corticosteroid injections to manage symptoms and improve joint function.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to reactive arthropathies
  • Potential for overlapping symptoms with other arthritic conditions
  • Need for comprehensive documentation of clinical findings
  • Variability in treatment approaches based on etiology

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to specify laterality of the condition
  • Misclassification of reactive arthropathies as primary arthritic conditions
  • Lack of supporting imaging or laboratory results

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include detailed imaging reports (X-rays, MRIs) and functional assessments to evaluate joint stability and range of motion.

Common Clinical Scenarios

Patients may present with acute hip pain following a recent infection or systemic illness, requiring surgical intervention if conservative management fails.

Billing Considerations

Orthopedic specialists must document joint-specific considerations, including the degree of joint effusion and any structural changes observed on imaging.

Rheumatology

Documentation Requirements

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

Common Clinical Scenarios

Patients may have a history of autoimmune conditions that predispose them to reactive arthropathies, necessitating a comprehensive evaluation of systemic involvement.

Billing Considerations

Rheumatologists must consider the potential for systemic involvement and document any extra-articular manifestations.

Physical Medicine

Documentation Requirements

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

Common Clinical Scenarios

Patients may require rehabilitation following acute exacerbations of hip pain to restore function and mobility.

Billing Considerations

Physical medicine specialists should document specific mobility limitations and the impact on daily activities.

Coding Guidelines

Inclusion Criteria

Use M02.859 When
  • Official coding guidelines require documentation of laterality (right, left, bilateral) and severity of the condition
  • Encounter type (initial, subsequent, sequela) must also be specified to ensure accurate coding

Exclusion Criteria

Do NOT use M02.859 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 effusion management in reactive arthropathies.

Documentation Requirements

Document the joint involved, the amount of fluid aspirated, and any therapeutic agents injected.

Specialty Considerations

Orthopedic and rheumatologic specialists should note the indication for the procedure and any prior treatments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has increased specificity in coding musculoskeletal conditions, allowing for better tracking of reactive arthropathies and their management.

ICD-9 vs ICD-10

The transition to ICD-10 has increased specificity in coding musculoskeletal conditions, allowing for better tracking of reactive arthropathies and their management.

Reimbursement & Billing Impact

The transition to ICD-10 has increased specificity in coding musculoskeletal conditions, allowing for better tracking of reactive arthropathies and their management.

Resources

Clinical References

  • •
    American College of Rheumatology Guidelines

Coding & Billing References

  • •
    American College of Rheumatology Guidelines

Frequently Asked Questions

What are the common causes of reactive arthropathies?

Common causes include infections (e.g., bacterial, viral), autoimmune diseases, and post-infectious inflammatory responses. Accurate documentation of the patient's history and any recent infections is crucial for coding.