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ICD-10 Guide
ICD-10 CodesQ66.2

Q66.2

Billable

Congenital metatarsus (primus) varus

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

Code Description

ICD-10 Q66.2 is a billable code used to indicate a diagnosis of congenital metatarsus (primus) varus.

Key Diagnostic Point:

Congenital metatarsus varus, also known as metatarsus primus varus, is a foot deformity characterized by an inward deviation of the first metatarsal bone. This condition is often present at birth and can lead to an abnormal foot position, which may affect walking and overall mobility. The deformity is typically identified during a physical examination, where the foot appears to have a curved shape, with the big toe angled towards the second toe. While the exact cause of metatarsus varus is not fully understood, it is believed to be related to intrauterine positioning or genetic factors. Treatment options may include observation, corrective shoes, or orthotic devices, and in some cases, surgical intervention may be necessary to correct the alignment. Early diagnosis and management are crucial to prevent complications such as pain or difficulty in ambulation as the child grows. This condition is often associated with other congenital malformations, particularly those affecting the musculoskeletal system.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in presentation and severity of the condition
  • Potential association with other congenital malformations
  • Need for multidisciplinary documentation (orthopedic, pediatric, genetic)
  • Differentiation from similar foot deformities (e.g., clubfoot)

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to note associated congenital conditions
  • Misclassification of foot deformities
  • Lack of follow-up documentation on treatment outcomes

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Pediatric documentation should include detailed physical examination findings, family history of congenital conditions, and any associated developmental concerns.

Common Clinical Scenarios

Common scenarios include newborn assessments where foot deformities are identified, and referrals to orthopedic specialists for management.

Billing Considerations

Consideration should be given to the child's overall development and any potential impact on mobility and quality of life.

Genetics

Documentation Requirements

Genetic documentation should include family history, potential syndromic associations, and any genetic testing results that may inform the diagnosis.

Common Clinical Scenarios

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

Billing Considerations

Genetic factors may play a role in the occurrence of metatarsus varus, necessitating a thorough evaluation of family history and potential genetic syndromes.

Coding Guidelines

Inclusion Criteria

Use Q66.2 When
  • According to ICD
  • 10 coding guidelines, congenital conditions should be coded based on the specific malformation and any associated conditions
  • Documentation must clearly indicate the diagnosis, treatment, and any relevant clinical findings

Exclusion Criteria

Do NOT use Q66.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28485CPT Code

Correction of metatarsus varus

Clinical Scenario

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

Documentation Requirements

Surgical reports must detail the procedure, indications, and postoperative care.

Specialty Considerations

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

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. This specificity aids in better tracking of congenital malformations and their management.

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. This specificity aids in better tracking of congenital malformations and their management.

Reimbursement & Billing Impact

reimbursement processes. This specificity aids in better tracking of congenital malformations and their management.

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 varus accurately?

Accurate coding of congenital metatarsus varus is essential for appropriate reimbursement, tracking of congenital conditions, and ensuring that patients receive the necessary care and follow-up. It also aids in research and understanding of congenital malformations.