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ICD-10 Guide
ICD-10 CodesM21.121

M21.121

Billable

Varus deformity, not elsewhere classified, right elbow

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

Code Description

ICD-10 M21.121 is a billable code used to indicate a diagnosis of varus deformity, not elsewhere classified, right elbow.

Key Diagnostic Point:

Varus deformity of the elbow is characterized by an inward angulation of the forearm relative to the upper arm, resulting in a 'bowing' appearance. This condition can be acquired due to various factors, including trauma, arthritis, or developmental issues. In adults, it may arise from conditions such as osteoarthritis or post-traumatic changes following fractures. The varus deformity can lead to functional limitations, pain, and decreased range of motion in the elbow joint. Patients may present with symptoms such as discomfort during activities that require elbow flexion or extension, and they may have difficulty with gripping or lifting objects. Treatment options often include physical therapy, bracing, or surgical intervention to correct the alignment and restore function. Surgical procedures may involve osteotomy or arthroplasty, depending on the severity of the deformity and the underlying cause. Accurate coding of this condition is essential for appropriate management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other elbow deformities
  • Need for detailed clinical documentation
  • Potential for multiple underlying causes
  • Variability in treatment approaches

Audit Risk Factors

  • Inadequate documentation of the deformity's cause
  • Failure to specify laterality
  • Lack of supporting clinical evidence for the diagnosis
  • Misclassification with other elbow conditions

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with elbow pain and deformity, post-traumatic deformities, or degenerative joint disease.

Billing Considerations

Ensure documentation reflects the severity of the deformity and any functional limitations.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive assessment of functional limitations and rehabilitation goals.

Common Clinical Scenarios

Patients requiring rehabilitation post-surgery or those with chronic pain due to varus deformity.

Billing Considerations

Focus on documenting the impact of the deformity on daily activities and rehabilitation progress.

Coding Guidelines

Inclusion Criteria

Use M21.121 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include details about the deformity's cause and any associated conditions

Exclusion Criteria

Do NOT use M21.121 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

24357CPT Code

Osteotomy, elbow

Clinical Scenario

Used in cases of severe varus deformity requiring surgical correction.

Documentation Requirements

Pre-operative assessment, surgical notes, and post-operative follow-up documentation.

Specialty Considerations

Orthopedic surgeons should document the rationale for surgical intervention.

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 planning.

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 planning.

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 planning.

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 varus and valgus deformity?

Varus deformity refers to an inward angulation of the limb, while valgus deformity refers to an outward angulation. Accurate coding requires understanding these distinctions.