ICD-10 Q66.6
Billable / SpecificOther congenital valgus deformities of feet
About ICD-10-CM Q66.6
ICD-10-CM code Q66.6 represents Other congenital valgus deformities of feet. This is a billable/specific code in the Congenital Malformations chapter (block Q66). The 2026 edition of ICD-10-CM Q66.6 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Q66.6. Per CMS ICD-10-CM Tabular 2026.
- Congenital metatarsus valgus
Medicare LCD Coverage for Q66.6
Local Coverage Determinations (LCDs) from CMS MACs that list Q66.6 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q66.6.
1 Cigna
1 Aetna
CPT Codes Commonly Billed with Q66.6
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert Q66.6 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| Q66.6 | 75469 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Q66.6
Other codes in section Q65-Q79 (Congenital malformations and deformations of the musculoskeletal system).
ICD-10 Q66.6, Billing FAQ
Is ICD-10 code Q66.6 billable? +
Yes, Q66.6 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to Q66.6? +
ICD-10 Q66.6 includes: Congenital metatarsus valgus.
What ICD-9 codes does Q66.6 map to? +
Per CMS GEMs, Q66.6 maps to ICD-9 codes: 75469. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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