ICD-10 Q23.9
Billable / SpecificCongenital malformation of aortic and mitral valves, unspecified
About ICD-10-CM Q23.9
ICD-10-CM code Q23.9 represents Congenital malformation of aortic and mitral valves, unspecified. This is a billable/specific code in the Congenital Malformations chapter (block Q23). The 2026 edition of ICD-10-CM Q23.9 became effective on October 1, 2025.
Medicare LCD Coverage for Q23.9
Local Coverage Determinations (LCDs) from CMS MACs that list Q23.9 as a covered diagnosis.
Showing top 10 of 193 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q23.9.
2 Cigna
5 Medicare
CPT Codes Commonly Billed with Q23.9
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 Q23.9 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 |
|---|---|---|
| Q23.9 | 74689 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Q23.9
Other codes in section Q20-Q28 (Congenital malformations of the circulatory system).
ICD-10 Q23.9, Billing FAQ
Is ICD-10 code Q23.9 billable? +
Yes, Q23.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does Q23.9 map to? +
Per CMS GEMs, Q23.9 maps to ICD-9 codes: 74689. 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 July 16, 2026.
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