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ICD-10 Guide
ICD-10 CodesM66.311

M66.311

Billable

Spontaneous rupture of flexor tendons, right shoulder

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

Code Description

ICD-10 M66.311 is a billable code used to indicate a diagnosis of spontaneous rupture of flexor tendons, right shoulder.

Key Diagnostic Point:

Spontaneous rupture of flexor tendons in the right shoulder is a condition characterized by the unexpected tearing of the flexor tendons, which are responsible for the movement and stability of the shoulder joint. This condition can occur without any preceding trauma or injury, often linked to underlying degenerative changes or inflammatory processes such as tenosynovitis. Patients may present with acute pain, swelling, and loss of function in the shoulder, which can significantly impact daily activities. Diagnosis typically involves a thorough clinical examination, imaging studies such as MRI or ultrasound, and assessment of the patient's history. Treatment options may include conservative management with physical therapy and anti-inflammatory medications, or surgical intervention to repair the ruptured tendons, depending on the severity of the rupture and the patient's overall health. Accurate coding of this condition is crucial for appropriate reimbursement and to reflect the complexity of the patient's clinical picture.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between spontaneous and traumatic ruptures
  • Understanding the anatomical specifics of flexor tendons
  • Identifying associated conditions like tenosynovitis
  • Documenting the severity and impact on function

Audit Risk Factors

  • Inadequate documentation of the spontaneous nature of the rupture
  • Failure to specify laterality (right shoulder)
  • Lack of imaging studies to support the diagnosis
  • Inconsistent treatment documentation

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative reports, imaging studies, and pre-operative assessments.

Common Clinical Scenarios

Surgical repair of ruptured tendons, post-operative follow-up for tendon healing.

Billing Considerations

Ensure documentation reflects the surgical approach and any complications.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive evaluations, treatment plans, and progress notes.

Common Clinical Scenarios

Rehabilitation post tendon repair, management of pain and function.

Billing Considerations

Document functional limitations and response to therapy.

Coding Guidelines

Inclusion Criteria

Use M66.311 When
  • Follow official coding guidelines for reporting tendon ruptures, ensuring accurate documentation of the condition's spontaneous nature and laterality
  • Include any relevant co
  • morbidities or associated conditions

Exclusion Criteria

Do NOT use M66.311 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

23470CPT Code

Repair of ruptured tendon, shoulder

Clinical Scenario

Used when surgical repair is performed for spontaneous rupture.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic documentation must include pre-operative assessments and post-operative care plans.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tendon injuries, improving the granularity of data for treatment outcomes and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tendon injuries, improving the granularity of data for treatment outcomes and reimbursement.

Reimbursement & Billing Impact

reimbursement.

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

What is the difference between spontaneous and traumatic tendon rupture?

Spontaneous tendon rupture occurs without any identifiable trauma, often due to degenerative changes, while traumatic rupture is a direct result of an injury or accident.