ICD-10 K91.1
Billable / SpecificPostgastric surgery syndromes
About ICD-10-CM K91.1
ICD-10-CM code K91.1 represents Postgastric surgery syndromes. This is a billable/specific code in the Digestive System chapter (block K91). The 2026 edition of ICD-10-CM K91.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under K91.1. Per CMS ICD-10-CM Tabular 2026.
- Dumping syndrome
- Postgastrectomy syndrome
- Postvagotomy syndrome
Medicare LCD Coverage for K91.1
Local Coverage Determinations (LCDs) from CMS MACs that list K91.1 as a covered diagnosis.
Showing top 10 of 69 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing K91.1.
4 Medicare
4 Aetna
Convert K91.1 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 |
|---|---|---|
| K91.1 | 5642 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To K91.1
Other codes in section K90-K95 (Other diseases of the digestive system).
ICD-10 K91.1, Billing FAQ
Is ICD-10 code K91.1 billable? +
Yes, K91.1 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 K91.1? +
ICD-10 K91.1 includes: Dumping syndrome; Postgastrectomy syndrome; Postvagotomy syndrome.
What CPT codes are commonly billed with K91.1? +
Procedures frequently paired with K91.1 include: J3420, J3425.
What ICD-9 codes does K91.1 map to? +
Per CMS GEMs, K91.1 maps to ICD-9 codes: 5642. 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 17, 2026.
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