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ICD-10 Guide
ICD-10 CodesM02.312

M02.312

Billable

Reiter's disease, left shoulder

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

Code Description

ICD-10 M02.312 is a billable code used to indicate a diagnosis of reiter's disease, left shoulder.

Key Diagnostic Point:

Reiter's disease, also known as reactive arthritis, is a type of inflammatory arthritis that occurs as a reaction 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 M02.312, the focus is on the left shoulder joint, which may exhibit swelling, pain, and limited range of motion due to inflammation. Anatomically, the shoulder consists of the humerus, scapula, and clavicle, with the glenohumeral joint being the primary site of involvement. Pathophysiologically, the disease is believed to be triggered by infections, often of the genitourinary or gastrointestinal tract, leading to an autoimmune response that targets the joints. Clinically, patients may present with acute onset of pain and swelling in the left shoulder, often accompanied by systemic symptoms such as fever and malaise. The inflammatory process can lead to joint damage if not managed appropriately, making early diagnosis and treatment crucial.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of autoimmune mechanisms and their impact on joints
  • Involves specific anatomical knowledge of the shoulder joint
  • Differentiation from other types of arthritis is necessary
  • Documentation of laterality and specific joint involvement is critical

Audit Risk Factors

  • Inadequate documentation of joint involvement and laterality
  • Failure to document the underlying infection that triggered the arthritis
  • Misclassification of Reiter's disease as another type of arthritis
  • Lack of evidence for systemic symptoms or concurrent conditions

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (e.g., X-rays, MRIs) to assess joint damage and functional assessments to evaluate range of motion and strength.

Common Clinical Scenarios

Common scenarios include surgical interventions for severe joint damage or arthroscopic procedures for diagnostic purposes.

Billing Considerations

Joint-specific considerations include the assessment of joint stability and the potential for surgical intervention if conservative management fails.

Rheumatology

Documentation Requirements

Rheumatologic documentation should include laboratory tests for inflammatory markers (e.g., ESR, CRP) and disease activity assessments (e.g., DAS28).

Common Clinical Scenarios

Autoimmune and inflammatory scenarios may involve the management of concurrent conditions such as psoriasis or inflammatory bowel disease.

Billing Considerations

Systemic involvement may necessitate a multidisciplinary approach, considering the potential for extra-articular manifestations.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate the patient's ability to perform daily activities and any need for assistive devices.

Common Clinical Scenarios

Rehabilitation scenarios may include physical therapy to improve range of motion and strength in the affected shoulder.

Billing Considerations

Mobility limitations should be documented thoroughly to support the need for rehabilitation services.

Coding Guidelines

Inclusion Criteria

Use M02.312 When
  • 10 coding guidelines for M02
  • 312 require documentation of laterality (left shoulder) and the severity of the condition
  • Encounter type (initial, subsequent, or sequela) must also be documented to ensure accurate coding

Exclusion Criteria

Do NOT use M02.312 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 the left shoulder.

Documentation Requirements

Document the indication for the procedure, joint involved, and any therapeutic agents used.

Specialty Considerations

Orthopedic considerations include the need for imaging guidance in some cases.

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.

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.

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.

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 shoulders, along with possible conjunctivitis and urethritis. Patients may also experience systemic symptoms like fever and fatigue.