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ICD-10 Guide
ICD-10 CodesM02.31

M02.31

Billable

Reiter's disease, shoulder

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

Code Description

ICD-10 M02.31 is a billable code used to indicate a diagnosis of reiter's disease, shoulder.

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 is characterized by a triad of symptoms: arthritis, urethritis, and conjunctivitis. In the case of M02.31, the focus is on the shoulder joint, which may exhibit swelling, pain, and limited range of motion due to inflammation. Anatomically, the shoulder comprises the humerus, scapula, and clavicle, with the glenohumeral joint being the primary site of involvement. Pathophysiologically, the condition is believed to be triggered by bacterial infections, often in the urogenital or gastrointestinal tract, leading to an autoimmune response that targets the joints. Clinically, patients may present with unilateral shoulder pain, tenderness, and stiffness, particularly after an infection. Early diagnosis and management are crucial to prevent chronic joint damage.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of autoimmune mechanisms and their impact on joint health.
  • Involves specific anatomical knowledge of the shoulder joint.
  • Differentiation from other types of arthritis is necessary.
  • Documentation must reflect both the inflammatory nature and functional limitations.

Audit Risk Factors

  • Inadequate documentation of the inflammatory process.
  • Failure to specify laterality of shoulder involvement.
  • Misclassification of reactive arthritis as primary osteoarthritis.
  • Lack of evidence for prior infections leading to the condition.

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 range of motion and strength.

Common Clinical Scenarios

Patients may present with acute shoulder pain following a recent infection, requiring evaluation for potential surgical intervention if conservative management fails.

Billing Considerations

Joint-specific considerations include assessing for effusion, synovitis, and the impact of inflammation on surrounding structures.

Rheumatology

Documentation Requirements

Rheumatologic documentation must include laboratory tests for inflammatory markers (e.g., ESR, CRP) and disease activity assessments to monitor progression.

Common Clinical Scenarios

Patients may exhibit systemic symptoms such as fever or fatigue alongside joint pain, necessitating a comprehensive evaluation of autoimmune activity.

Billing Considerations

Systemic involvement may require monitoring for extra-articular manifestations, such as skin lesions or ocular symptoms.

Physical Medicine

Documentation Requirements

Functional assessments should document mobility limitations, pain levels, and the need for assistive devices to facilitate rehabilitation.

Common Clinical Scenarios

Rehabilitation may focus on restoring range of motion and strength post-inflammation, with tailored exercise programs.

Billing Considerations

Consideration of patient-specific goals and barriers to mobility is essential for effective rehabilitation planning.

Coding Guidelines

Inclusion Criteria

Use M02.31 When
  • 10 coding guidelines for M02
  • 31 require specificity in laterality (e
  • , left or right shoulder) and severity of the condition
  • Documentation must reflect the encounter type, whether it is an initial visit, follow
  • up, or a complication of treatment

Exclusion Criteria

Do NOT use M02.31 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 aspiration in cases of effusion due to Reiter's disease.

Documentation Requirements

Documentation must include indication for the procedure, joint involved, and any prior treatments.

Specialty Considerations

Orthopedic considerations include assessing joint stability and potential for surgical intervention if conservative measures fail.

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. M02.31 reflects the need for detailed documentation of joint involvement and associated symptoms.

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. M02.31 reflects the need for detailed documentation of joint involvement and associated symptoms.

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. M02.31 reflects the need for detailed documentation of joint involvement and associated symptoms.

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 affecting the shoulder?

Common symptoms include unilateral shoulder pain, swelling, tenderness, and limited range of motion, often following a recent infection.