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v1.0.0
ICD-10 Guide
ICD-10 CodesQ66.31

Q66.31

Billable

Other congenital varus deformities of feet, right foot

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 Q66.31 is a billable code used to indicate a diagnosis of other congenital varus deformities of feet, right foot.

Key Diagnostic Point:

Congenital varus deformities of the feet, specifically affecting the right foot, are characterized by an inward turning of the foot at the ankle joint. This condition can arise from a variety of factors, including genetic predispositions and environmental influences during fetal development. In pediatric patients, these deformities may be associated with other congenital malformations, particularly those affecting the musculoskeletal system. The clinical presentation can vary from mild to severe, impacting the child's ability to walk and engage in normal activities. Treatment often involves orthopedic interventions, such as bracing or surgery, to correct the alignment of the foot and improve function. It is essential for healthcare providers to document the specific nature of the deformity, any associated conditions, and the treatment plan to ensure accurate coding and billing.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of the deformity
  • Potential association with other congenital conditions
  • Need for detailed documentation of treatment plans
  • Variations in coding based on the specific type of varus deformity

Audit Risk Factors

  • Inadequate documentation of associated congenital conditions
  • Failure to specify the severity of the deformity
  • Incorrect linkage of procedures to the diagnosis
  • Omission of treatment details in the medical record

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Pediatric documentation must include growth and developmental assessments, detailed descriptions of the deformity, and treatment plans.

Common Clinical Scenarios

Common scenarios include referrals for orthopedic evaluation, follow-up visits post-correction surgery, and assessments for associated conditions.

Billing Considerations

Considerations include the child's age, developmental milestones, and potential impact on mobility.

Genetics

Documentation Requirements

Genetic documentation should include family history, genetic testing results, and any syndromic associations with the deformity.

Common Clinical Scenarios

Scenarios may involve genetic counseling for families with a history of congenital malformations or syndromes.

Billing Considerations

Considerations include the potential for chromosomal abnormalities that may be associated with the deformity.

Coding Guidelines

Inclusion Criteria

Use Q66.31 When
  • Follow official ICD
  • CM guidelines for coding congenital malformations, ensuring specificity in documentation and coding based on the clinical scenario

Exclusion Criteria

Do NOT use Q66.31 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28485CPT Code

Surgical correction of foot deformity

Clinical Scenario

Used in cases where surgical intervention is required for severe varus deformity.

Documentation Requirements

Detailed operative notes and pre-operative assessments.

Specialty Considerations

Orthopedic specialists should provide comprehensive documentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding congenital conditions, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding congenital conditions, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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 documentation is required for coding Q66.31?

Documentation must include a detailed description of the deformity, any associated congenital conditions, treatment plans, and follow-up care.