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v1.0.0
ICD-10 Guide
ICD-10 CodesQ66.21

Q66.21

Billable

Congenital metatarsus primus varus

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

Code Description

ICD-10 Q66.21 is a billable code used to indicate a diagnosis of congenital metatarsus primus varus.

Key Diagnostic Point:

Congenital metatarsus primus varus is a foot deformity characterized by an inward deviation of the first metatarsal bone, leading to a prominent first toe. This condition is often present at birth and can be associated with other congenital malformations. The etiology is not fully understood but may involve genetic factors and environmental influences during fetal development. Clinically, it presents as a forefoot adduction and can lead to functional issues if not addressed. Treatment options may include conservative management with orthotics or surgical intervention in more severe cases. Accurate diagnosis and coding are essential, especially in pediatric populations, as this condition can impact mobility and quality of life. The condition is typically diagnosed through physical examination and may be confirmed with imaging studies if necessary. Early intervention is crucial for optimal outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity
  • Potential association with other congenital conditions
  • Need for multidisciplinary management
  • Documentation of family history and genetic factors

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to document associated congenital conditions
  • Misclassification of the severity of the condition
  • Lack of follow-up documentation post-treatment

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Documentation must include detailed physical examination findings, family history, and any associated congenital anomalies.

Common Clinical Scenarios

Common scenarios include newborn assessments revealing foot deformities and referrals for orthopedic evaluation.

Billing Considerations

Consideration of developmental milestones and potential impact on mobility is crucial for accurate coding.

Genetics

Documentation Requirements

Genetic counseling notes should include family history, potential syndromic associations, and genetic testing results if applicable.

Common Clinical Scenarios

Scenarios may involve referrals for genetic evaluation in cases of metatarsus primus varus associated with syndromes.

Billing Considerations

Awareness of genetic syndromes that may present with foot deformities is essential for accurate coding.

Coding Guidelines

Inclusion Criteria

Use Q66.21 When
  • Follow the official ICD
  • CM guidelines for coding congenital malformations, ensuring accurate documentation of the condition's severity and any associated anomalies

Exclusion Criteria

Do NOT use Q66.21 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28200CPT Code

Osteotomy, first metatarsal

Clinical Scenario

Used in cases where surgical intervention is required for correction of metatarsus primus varus.

Documentation Requirements

Surgical notes must detail the procedure, indications, and any complications.

Specialty Considerations

Orthopedic specialists should provide comprehensive documentation to support the procedure.

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.

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.

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 is the significance of coding congenital metatarsus primus varus?

Accurate coding of congenital metatarsus primus varus is essential for appropriate treatment planning, reimbursement, and tracking of congenital conditions. It helps in understanding the prevalence and outcomes of this condition in pediatric populations.