ICD-10 K91.2
Billable / Specific CCPostsurgical malabsorption, not elsewhere classified
About ICD-10-CM K91.2
ICD-10-CM code K91.2 represents Postsurgical malabsorption, not elsewhere classified. This is a billable/specific code in the Digestive System chapter (block K91). The 2026 edition of ICD-10-CM K91.2 became effective on October 1, 2025.
Coding Tips for K91.2
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
K91.2 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under K91.2. Per CMS ICD-10-CM Tabular 2026.
- Postsurgical blind loop syndrome
Type 1 Excludes
Pure excludes, these codes can never be coded together with K91.2. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- malabsorption osteomalacia in adults (M83.2)
- malabsorption osteoporosis, postsurgical (M80.8-, M81.8)
Inpatient DRG Impact, CC
codes Postsurgical malabsorption, not elsewhere classified. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for K91.2
Local Coverage Determinations (LCDs) from CMS MACs that list K91.2 as a covered diagnosis.
Showing top 10 of 66 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing K91.2.
2 Cigna
5 Medicare
4 Aetna
Convert K91.2 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 |
|---|---|---|
| K91.2 | 5793 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To K91.2
Other codes in section K90-K95 (Other diseases of the digestive system).
ICD-10 K91.2, Billing FAQ
Is ICD-10 code K91.2 billable? +
Yes, K91.2 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 K91.2? +
ICD-10 K91.2 includes: Postsurgical blind loop syndrome.
What codes are Type 1 Excludes for K91.2? +
Type 1 Excludes (never code together with K91.2): malabsorption osteomalacia in adults (M83.2); malabsorption osteoporosis, postsurgical (M80.8-, M81.8)
Is K91.2 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with K91.2? +
Procedures frequently paired with K91.2 include: J3420, J3425.
What ICD-9 codes does K91.2 map to? +
Per CMS GEMs, K91.2 maps to ICD-9 codes: 5793. 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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