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ICD-10 Guide
ICD-10 CodesM67.29

M67.29

Billable

Synovial hypertrophy, not elsewhere classified, multiple sites

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/17/2025

Code Description

ICD-10 M67.29 is a billable code used to indicate a diagnosis of synovial hypertrophy, not elsewhere classified, multiple sites.

Key Diagnostic Point:

Synovial hypertrophy refers to the abnormal enlargement of the synovial membrane, which lines the joints and tendon sheaths. This condition can occur in multiple sites and is often associated with inflammatory processes, such as rheumatoid arthritis or other forms of inflammatory arthritis. The hypertrophy can lead to joint swelling, pain, and decreased range of motion, significantly impacting a patient's quality of life. In cases where synovial hypertrophy is present, it may be accompanied by tenosynovitis, which is the inflammation of the synovial sheath surrounding a tendon. This can result in tendon pain, swelling, and, in severe cases, tendon ruptures. Surgical interventions, such as synovectomy or tendon repair, may be necessary to alleviate symptoms and restore function. Accurate coding of M67.29 is crucial for proper treatment planning and reimbursement, as it captures the complexity of synovial disorders that do not fit neatly into other classifications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Overlap with other inflammatory joint diseases
  • Need for detailed documentation of multiple sites
  • Potential for co-existing conditions affecting coding

Audit Risk Factors

  • Inadequate documentation of multiple sites
  • Failure to specify the underlying cause of hypertrophy
  • Misclassification of related conditions
  • Lack of clarity in treatment plans

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical notes on joint examination, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with joint pain and swelling, particularly in the context of autoimmune diseases.

Billing Considerations

Ensure that all affected joints are documented, and the underlying cause of synovial hypertrophy is clearly stated.

Orthopedic Surgery

Documentation Requirements

Surgical reports detailing the procedure performed, findings, and post-operative care.

Common Clinical Scenarios

Patients requiring surgical intervention for tendon repair or synovectomy due to severe synovial hypertrophy.

Billing Considerations

Document the specific tendons involved and any complications that arise during surgery.

Coding Guidelines

Inclusion Criteria

Use M67.29 When
  • According to ICD
  • 10 guidelines, M67
  • 29 should be used when synovial hypertrophy is documented without a more specific classification
  • Coders must ensure that the condition is not better described by other codes and that all relevant clinical information is captured

Exclusion Criteria

Do NOT use M67.29 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

29875CPT Code

Arthroscopy, knee, diagnostic, with or without synovial biopsy

Clinical Scenario

Used when performing an arthroscopy to evaluate synovial hypertrophy.

Documentation Requirements

Document the findings during the procedure and any biopsies taken.

Specialty Considerations

Orthopedic surgeons should ensure that the reason for the procedure aligns with the diagnosis.

27301CPT Code

Tenosynovectomy, tendon sheath

Clinical Scenario

Performed when synovial hypertrophy is causing significant symptoms.

Documentation Requirements

Detailed operative report outlining the procedure and indications.

Specialty Considerations

Ensure that the specific tendon involved is documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like synovial hypertrophy, improving the accuracy of diagnoses and treatment plans. M67.29 captures a broader range of presentations, which can enhance patient care and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like synovial hypertrophy, improving the accuracy of diagnoses and treatment plans. M67.29 captures a broader range of presentations, which can enhance patient care and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

When should I use M67.29 instead of a more specific code?

Use M67.29 when synovial hypertrophy is present at multiple sites and cannot be classified under a more specific code. Ensure that documentation supports this coding choice.