Reserved for future guideline expansion
K63.3
BookmarkUlcer of intestine
Filed alongside this entry 11
under Erosion
- artery I77.2
- bronchus J98.09
- cervix (uteri) (acquired) (chronic) (congenital) N86
- dental (idiopathic) (occupational) (due to diet, drugs or vomiting) K03.2
- esophagus K22.10
- intestine K63.3
- lymphatic vessel I89.8
- spine, aneurysmal A52.09
- teeth (idiopathic) (occupational) (due to diet, drugs or vomiting) K03.2
- urethra N36.8
- uterus N85.8
Index entries, exactly as the book files them. This says they are listed together — not that any of them is documented in your chart.
Billable FY2027 2026-10-01 → 2027-09-30
How to use this page
Everything the published sources say about one code, on one page.
- Read the Excludes1 block first — it is the one that stops you coding this at all alongside another code.
- Excludes2, Code first, Use additional and Includes follow. A note inherited from a parent category is labelled with the category it came from, so you can see why it applies.
- Official Guidelines sit below. "Guidelines naming this code" cite the code or a range containing it; "Chapter guidance" is the general guidance for its chapter and is the weaker signal.
- Guideline text is quoted verbatim with its section number and page, so you can check it against the published document.
- Risk-model chips show which published CMS models map this code.
What this page does not do
- Guidance is quoted, never paraphrased — a paraphrase of a coding rule is a different rule.
- Medication candidates, where shown, are matched by condition *name* and are offered as candidates for you to judge. They are not "the drugs for this code".
Exclusions16never code together
K63.3code
Excludes1
- duodenal ulcer (K26.-)K26.-K26.-
- gastrointestinal ulcer (K28.-)K28.-K28.-
- gastrojejunal ulcer (K28.-)K28.-K28.-
- jejunal ulcer (K28.-)K28.-K28.-
- peptic ulcer, site unspecified (K27.-)K27.-K27.-
- ulcer of intestine with perforation (K63.1)K63.1K63.1
- ulcer of anus or rectum (K62.6)K62.6K62.6
- ulcerative colitis (K51.-)K51.-K51.-
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes1
K63.3code
Inclusion terms
- Primary ulcer of small intestine
Official Guidelines1names this code
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Index entries leading here3
Alongside this code7same parent — K63
Medications1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.