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ICD-10 Guide
ICD-10 CodesM21.932

M21.932

Billable

Unspecified acquired deformity of left forearm

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

Code Description

ICD-10 M21.932 is a billable code used to indicate a diagnosis of unspecified acquired deformity of left forearm.

Key Diagnostic Point:

An unspecified acquired deformity of the left forearm refers to a structural alteration in the forearm that has developed due to various factors such as trauma, disease, or other medical conditions. These deformities can manifest as changes in bone structure, joint alignment, or soft tissue integrity, leading to functional impairments. Common causes include fractures that heal improperly, infections, or conditions like arthritis that can lead to joint deformities. The left forearm consists of two long bones, the radius and ulna, and any acquired deformity can affect the range of motion, strength, and overall functionality of the arm. Patients may present with symptoms such as pain, swelling, or visible deformity, and may require imaging studies for diagnosis. Treatment options can vary widely, from conservative management with physical therapy to surgical interventions aimed at correcting the deformity. Accurate coding is essential for proper reimbursement and to reflect the complexity of the patient's condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation of acquired deformities
  • Need for precise clinical details to differentiate from congenital deformities
  • Potential overlap with other codes for similar conditions
  • Variations in treatment approaches that may affect coding

Audit Risk Factors

  • Inadequate documentation of the deformity's cause
  • Failure to specify the type of acquired deformity
  • Lack of imaging or clinical evidence to support the diagnosis
  • Inconsistent coding practices among providers

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed clinical notes including history of the deformity, physical examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with post-fracture deformities, osteoarthritis-related changes, or post-surgical complications.

Billing Considerations

Ensure that the documentation clearly states the acquired nature of the deformity and any prior treatments.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive assessments of functional limitations and treatment plans.

Common Clinical Scenarios

Rehabilitation following corrective surgery or management of chronic pain due to deformities.

Billing Considerations

Focus on functional outcomes and the impact of the deformity on daily activities.

Coding Guidelines

Inclusion Criteria

Use M21.932 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the documentation supports the diagnosis of an acquired deformity
  • Include details about the cause and any associated conditions

Exclusion Criteria

Do NOT use M21.932 When
  • Exclude congenital deformities and ensure that the deformity is not due to a neoplastic process

Related ICD-10 Codes

Related CPT Codes

25447CPT Code

Osteotomy, forearm

Clinical Scenario

Used when surgical correction of the acquired deformity is performed.

Documentation Requirements

Surgical notes detailing the procedure, indications, and post-operative care.

Specialty Considerations

Orthopedic surgeons must document the rationale for surgery and expected outcomes.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of acquired deformities, improving the granularity of data collected for treatment outcomes and reimbursement. M21.932 provides a clear framework for documenting left forearm deformities, which can enhance patient care and tracking of treatment efficacy.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of acquired deformities, improving the granularity of data collected for treatment outcomes and reimbursement. M21.932 provides a clear framework for documenting left forearm deformities, which can enhance patient care and tracking of treatment efficacy.

Reimbursement & Billing Impact

reimbursement. M21.932 provides a clear framework for documenting left forearm deformities, which can enhance patient care and tracking of treatment efficacy.

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 acquired and congenital deformities?

Acquired deformities develop after birth due to factors such as injury, disease, or surgery, while congenital deformities are present at birth and result from genetic or environmental factors during fetal development.