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ICD-10 Guide
ICD-10 CodesM21.23

M21.23

Billable

Flexion deformity, wrist

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

Code Description

ICD-10 M21.23 is a billable code used to indicate a diagnosis of flexion deformity, wrist.

Key Diagnostic Point:

Flexion deformity of the wrist is characterized by an abnormal bending of the wrist joint, resulting in a decreased ability to extend the wrist and often leading to functional limitations in hand use. This condition can be acquired due to various factors, including trauma, neurological disorders, or inflammatory conditions such as rheumatoid arthritis. The deformity may manifest as a fixed position of the wrist in flexion, which can significantly impair the patient's ability to perform daily activities, such as grasping objects or typing. In some cases, flexion deformity may also be associated with other hand deformities, including finger abnormalities or conditions like hallux valgus in the lower extremities. Treatment options may include physical therapy, splinting, or surgical interventions aimed at correcting the deformity and restoring function. Accurate coding of this condition is essential for appropriate management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between acquired and congenital deformities
  • Identifying associated conditions or complications
  • Documenting the severity and impact on function
  • Understanding the relationship with other hand deformities

Audit Risk Factors

  • Inadequate documentation of the deformity's impact on function
  • Failure to specify the acquired nature of the deformity
  • Lack of clarity on associated conditions
  • Improper linkage of the diagnosis to treatment procedures

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed clinical notes describing the deformity, treatment plan, and functional limitations.

Common Clinical Scenarios

Patients with post-traumatic wrist deformities or those with rheumatoid arthritis presenting with wrist flexion.

Billing Considerations

Ensure that all relevant imaging and functional assessments are documented to support the diagnosis.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive assessments of functional abilities and rehabilitation goals.

Common Clinical Scenarios

Patients undergoing rehabilitation after wrist surgery or those with neurological conditions affecting wrist function.

Billing Considerations

Document progress and response to therapy to justify ongoing treatment.

Coding Guidelines

Inclusion Criteria

Use M21.23 When
  • According to ICD
  • 10 guidelines, M21
  • 23 should be used when the flexion deformity is acquired and documented as such
  • It is important to note any associated conditions or complications that may affect treatment and coding

Exclusion Criteria

Do NOT use M21.23 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

25447CPT Code

Wrist arthrodesis

Clinical Scenario

Used in cases where surgical correction of wrist flexion deformity is necessary.

Documentation Requirements

Operative reports detailing the procedure and pre-operative assessments.

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 wrist deformities, improving the accuracy of diagnoses and treatment plans. M21.23 provides a clear distinction between acquired and congenital conditions, which is crucial for appropriate management and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of wrist deformities, improving the accuracy of diagnoses and treatment plans. M21.23 provides a clear distinction between acquired and congenital conditions, which is crucial for appropriate management 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 primary cause of wrist flexion deformity?

Wrist flexion deformity can be caused by various factors, including trauma, neurological conditions, or inflammatory diseases like rheumatoid arthritis. It is essential to identify the underlying cause for appropriate treatment.