ICD-10 Q40.1
Billable / SpecificCongenital hiatus hernia
About ICD-10-CM Q40.1
ICD-10-CM code Q40.1 represents Congenital hiatus hernia. This is a billable/specific code in the Congenital Malformations chapter (block Q40). The 2026 edition of ICD-10-CM Q40.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Q40.1. Per CMS ICD-10-CM Tabular 2026.
- Congenital displacement of cardia through esophageal hiatus
Type 1 Excludes
Pure excludes, these codes can never be coded together with Q40.1. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- congenital diaphragmatic hernia (Q79.0)
Medicare LCD Coverage for Q40.1
Local Coverage Determinations (LCDs) from CMS MACs that list Q40.1 as a covered diagnosis.
Showing top 10 of 154 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q40.1.
1 Cigna
4 Medicare
CPT Codes Commonly Billed with Q40.1
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 Q40.1 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 |
|---|---|---|
| Q40.1 | 7506 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Q40.1
Other codes in section Q38-Q45 (Other congenital malformations of the digestive system).
ICD-10 Q40.1, Billing FAQ
Is ICD-10 code Q40.1 billable? +
Yes, Q40.1 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 Q40.1? +
ICD-10 Q40.1 includes: Congenital displacement of cardia through esophageal hiatus.
What codes are Type 1 Excludes for Q40.1? +
Type 1 Excludes (never code together with Q40.1): congenital diaphragmatic hernia (Q79.0)
What ICD-9 codes does Q40.1 map to? +
Per CMS GEMs, Q40.1 maps to ICD-9 codes: 7506. 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 June 1, 2026.
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