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v1.0.0
ICD-10 Guide
ICD-10 CodesQ66.212

Q66.212

Billable

Congenital metatarsus primus varus, left foot

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

Code Description

ICD-10 Q66.212 is a billable code used to indicate a diagnosis of congenital metatarsus primus varus, left foot.

Key Diagnostic Point:

Congenital metatarsus primus varus, also known as congenital hallux varus, is a deformity characterized by the lateral deviation of the first metatarsal bone in the left foot. This condition is typically present at birth and can lead to functional impairment and cosmetic concerns if not addressed. The etiology of metatarsus primus varus is often multifactorial, involving genetic predispositions and environmental influences during fetal development. Clinically, it may present with a noticeable outward angulation of the big toe, which can affect gait and balance in infants and children. Early diagnosis and intervention are crucial to prevent long-term complications, and treatment options may include orthotic management, physical therapy, or surgical correction in more severe cases. 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 condition
  • Need for precise documentation of laterality (left foot)
  • Potential for co-occurring congenital conditions
  • Differentiation from similar foot deformities

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to specify laterality
  • Misclassification with other foot deformities
  • Lack of treatment documentation

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Pediatric documentation should include detailed physical examination findings, family history of congenital conditions, and any interventions undertaken.

Common Clinical Scenarios

Common scenarios include routine pediatric check-ups where foot deformities are assessed, and referrals to orthopedic specialists for management.

Billing Considerations

Consideration of developmental milestones and the impact of the deformity on mobility and function is essential for accurate coding.

Genetics

Documentation Requirements

Genetic documentation may include family history, genetic testing results, and any syndromic associations with congenital foot deformities.

Common Clinical Scenarios

Genetic counseling sessions for families with a history of congenital malformations or syndromes that may include foot deformities.

Billing Considerations

Awareness of genetic syndromes that may present with metatarsus primus varus is important for accurate coding and management.

Coding Guidelines

Inclusion Criteria

Use Q66.212 When
  • Follow the official ICD
  • CM coding guidelines for congenital malformations, ensuring accurate documentation of laterality and any associated conditions
  • Use additional codes as necessary to capture the full clinical picture

Exclusion Criteria

Do NOT use Q66.212 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28485CPT Code

Correction of hallux varus

Clinical Scenario

Used when surgical intervention is required for severe cases of congenital metatarsus primus varus.

Documentation Requirements

Surgical reports must detail the procedure performed and the indication for surgery.

Specialty Considerations

Orthopedic specialists should provide comprehensive documentation to support the need for surgical correction.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of congenital conditions, improving the accuracy of data collection and reimbursement processes. Q66.212 provides a clear designation for congenital metatarsus primus varus, facilitating better tracking of outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of congenital conditions, improving the accuracy of data collection and reimbursement processes. Q66.212 provides a clear designation for congenital metatarsus primus varus, facilitating better tracking of outcomes and resource allocation.

Reimbursement & Billing Impact

reimbursement processes. Q66.212 provides a clear designation for congenital metatarsus primus varus, facilitating better tracking of 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 coding congenital metatarsus primus varus accurately?

Accurate coding of congenital metatarsus primus varus is crucial for appropriate treatment planning, reimbursement, and tracking of congenital conditions. It ensures that patients receive the necessary interventions and follow-up care, while also providing valuable data for research and healthcare quality improvement.