ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesM21.172

M21.172

Billable

Varus deformity, not elsewhere classified, left ankle

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

Code Description

ICD-10 M21.172 is a billable code used to indicate a diagnosis of varus deformity, not elsewhere classified, left ankle.

Key Diagnostic Point:

Varus deformity of the left ankle is characterized by an inward angulation of the ankle joint, resulting in a misalignment that can lead to abnormal weight distribution and increased stress on the medial structures of the ankle. This condition can be acquired due to various factors such as trauma, degenerative joint disease, or post-surgical changes. Patients may present with symptoms including pain, instability, and difficulty in ambulation. The deformity can also lead to secondary complications such as osteoarthritis or tendonitis if left untreated. Treatment options may include physical therapy, orthotic devices, or surgical interventions aimed at realigning the ankle joint and restoring normal function. Corrective procedures may involve osteotomy or arthrodesis, depending on the severity of the deformity and the patient's overall health status. Accurate coding of this condition is essential for appropriate management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of the deformity.
  • Differentiation from other types of ankle deformities.
  • Need for comprehensive documentation to support the diagnosis.
  • Potential for co-existing conditions that may complicate coding.

Audit Risk Factors

  • Inadequate documentation of the deformity's severity.
  • Failure to document co-existing conditions.
  • Misinterpretation of clinical notes leading to incorrect coding.
  • Lack of clarity on the treatment plan and its relation to the diagnosis.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed clinical notes including physical examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with chronic ankle pain, post-traumatic deformities, or degenerative changes.

Billing Considerations

Ensure that all relevant imaging studies and consultations are documented to support the diagnosis.

Physical Therapy

Documentation Requirements

Progress notes detailing functional assessments, treatment interventions, and patient responses.

Common Clinical Scenarios

Rehabilitation following surgical correction of varus deformity or conservative management of mild cases.

Billing Considerations

Documenting the patient's functional limitations and progress is crucial for coding therapy services.

Coding Guidelines

Inclusion Criteria

Use M21.172 When
  • According to ICD
  • 10 coding guidelines, M21
  • 172 should be used when the varus deformity is not classified elsewhere
  • Coders must ensure that the documentation supports the diagnosis and that the condition is not a result of congenital factors or other specified conditions

Exclusion Criteria

Do NOT use M21.172 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28300CPT Code

Osteotomy, tibia or fibula

Clinical Scenario

Used in cases where surgical correction of the varus deformity is indicated.

Documentation Requirements

Operative reports detailing the procedure and indication for surgery.

Specialty Considerations

Orthopedic surgeons must provide comprehensive documentation to support the necessity of the procedure.

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 varus deformity, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like varus deformity, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like varus deformity, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

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 significance of documenting laterality in varus deformity?

Documenting laterality is crucial for accurate coding and treatment planning, as it affects the management and surgical approach for the patient.