ICD-10 K63.3
Billable / Specific CCUlcer of intestine
About ICD-10-CM K63.3
ICD-10-CM code K63.3 represents Ulcer of intestine. This is a billable/specific code in the Digestive System chapter (block K63). The 2026 edition of ICD-10-CM K63.3 became effective on October 1, 2025.
Coding Tips for K63.3
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
K63.3 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 K63.3. Per CMS ICD-10-CM Tabular 2026.
- Primary ulcer of small intestine
Type 1 Excludes
Pure excludes, these codes can never be coded together with K63.3. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- duodenal ulcer (K26.-)
- gastrointestinal ulcer (K28.-)
- gastrojejunal ulcer (K28.-)
- jejunal ulcer (K28.-)
- peptic ulcer, site unspecified (K27.-)
- ulcer of intestine with perforation (K63.1)
- ulcer of anus or rectum (K62.6)
- ulcerative colitis (K51.-)
Inpatient DRG Impact, CC
code Ulcer of intestine. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for K63.3
Local Coverage Determinations (LCDs) from CMS MACs that list K63.3 as a covered diagnosis.
Showing top 10 of 320 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing K63.3.
5 Medicare
CPT Codes Commonly Billed with K63.3
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 K63.3 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 |
|---|---|---|
| K63.3 | 56982 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To K63.3
Other codes in section K55-K64 (Other diseases of intestines).
ICD-10 K63.3, Billing FAQ
Is ICD-10 code K63.3 billable? +
Yes, K63.3 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 K63.3? +
ICD-10 K63.3 includes: Primary ulcer of small intestine.
What codes are Type 1 Excludes for K63.3? +
Type 1 Excludes (never code together with K63.3): duodenal ulcer (K26.-); gastrointestinal ulcer (K28.-); gastrojejunal ulcer (K28.-)
Is K63.3 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 ICD-9 codes does K63.3 map to? +
Per CMS GEMs, K63.3 maps to ICD-9 codes: 56982. 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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