ICD-10 Q17.8
Billable / SpecificOther specified congenital malformations of ear
About ICD-10-CM Q17.8
ICD-10-CM code Q17.8 represents Other specified congenital malformations of ear. This is a billable/specific code in the Congenital Malformations chapter (block Q17). The 2026 edition of ICD-10-CM Q17.8 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Q17.8. Per CMS ICD-10-CM Tabular 2026.
- Congenital absence of lobe of ear
Medicare LCD Coverage for Q17.8
Local Coverage Determinations (LCDs) from CMS MACs that list Q17.8 as a covered diagnosis.
Showing top 10 of 21 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q17.8.
1 Medicare
1 Aetna
CPT Codes Commonly Billed with Q17.8
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 Q17.8 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 |
|---|---|---|
| Q17.8 | 74421 | 10000 |
| Q17.8 | 74429 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Q17.8
Other codes in section Q10-Q18 (Congenital malformations of eye, ear, face and neck).
ICD-10 Q17.8, Billing FAQ
Is ICD-10 code Q17.8 billable? +
Yes, Q17.8 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 Q17.8? +
ICD-10 Q17.8 includes: Congenital absence of lobe of ear.
What ICD-9 codes does Q17.8 map to? +
Per CMS GEMs, Q17.8 maps to ICD-9 codes: 74421, 74429. 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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