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v1.0.0
ICD-10 Guide
ICD-10 CodesM26.602

M26.602

Billable

Left temporomandibular joint disorder, unspecified

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

Code Description

ICD-10 M26.602 is a billable code used to indicate a diagnosis of left temporomandibular joint disorder, unspecified.

Key Diagnostic Point:

Left temporomandibular joint (TMJ) disorder refers to a range of conditions affecting the temporomandibular joint, which connects the jawbone to the skull. This disorder can manifest as pain, dysfunction, or both, and may be associated with various symptoms such as jaw clicking, limited jaw movement, and facial pain. The unspecified nature of this code indicates that the specific type of TMJ disorder has not been clearly defined, which can complicate diagnosis and treatment. TMJ disorders can arise from multiple factors, including dental misalignment, trauma, arthritis, or bruxism (teeth grinding). In the context of dentofacial anomalies, TMJ disorders may be exacerbated by malocclusion or other orthodontic issues, necessitating a multidisciplinary approach for effective management. Orthodontic treatment may be indicated to correct underlying dental alignment issues contributing to TMJ dysfunction. Accurate coding is essential for appropriate reimbursement and to ensure that patients receive the necessary care for their condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in symptoms and presentations of TMJ disorders
  • Need for comprehensive documentation to specify the nature of the disorder
  • Potential overlap with other dental and facial conditions
  • Variability in treatment approaches and their documentation

Audit Risk Factors

  • Insufficient documentation of symptoms and clinical findings
  • Lack of clear treatment plans or follow-up notes
  • Inconsistent coding practices among providers
  • Failure to document co-existing conditions

Specialty Focus

Medical Specialties

Dentistry

Documentation Requirements

Detailed clinical notes including patient history, symptoms, and treatment plans.

Common Clinical Scenarios

Patients presenting with jaw pain, clicking sounds, or limited jaw movement.

Billing Considerations

Documentation should clearly outline the relationship between dental alignment and TMJ symptoms.

Orthodontics

Documentation Requirements

Records of dental assessments, treatment plans, and progress notes.

Common Clinical Scenarios

Patients with malocclusion presenting with TMJ symptoms requiring orthodontic intervention.

Billing Considerations

Orthodontic treatment plans should address both dental alignment and TMJ health.

Coding Guidelines

Inclusion Criteria

Use M26.602 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used when the specific type of TMJ disorder is not documented
  • Ensure that the documentation supports the diagnosis and that any related conditions are also coded appropriately

Exclusion Criteria

Do NOT use M26.602 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for TMJ disorder management.

Documentation Requirements

Document patient history, examination findings, and treatment plan.

Specialty Considerations

Dentists and orthodontists should ensure comprehensive notes are maintained.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of TMJ disorders, improving the ability to capture the complexity of these conditions. M26.602 serves as a catch-all for unspecified cases, which can impact data collection and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of TMJ disorders, improving the ability to capture the complexity of these conditions. M26.602 serves as a catch-all for unspecified cases, which can impact data collection and treatment planning.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Dental Association

Coding & Billing References

  • •
    American Dental Association

Frequently Asked Questions

What should I document to support the use of M26.602?

Document the patient's symptoms, clinical findings, and any treatments provided. Ensure that the documentation reflects the unspecified nature of the disorder and any relevant dental history.