ICD-10 · PDGM grouping

C15-C26 — Malignant neoplasms of digestive organs

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.

OASIS-E2 v1.00.0 · ingested 2026-04-26

Codes in range

No clinical group

A period cannot be grouped from these.

Barred as primary

CMS rejects these in the primary position.

Where these codes group

60 of the 60 codes in C15-C26 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. Every code here is assigned a group.

KMMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases60

Every code in C15-C26

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

Code	Description	Clinical group	Primary position
C153	Malignant neoplasm of upper third of esophagus	K	Accepted
C154	Malignant neoplasm of middle third of esophagus	K	Accepted
C155	Malignant neoplasm of lower third of esophagus	K	Accepted
C158	Malignant neoplasm of overlapping sites of esophagus	K	Accepted
C159	Malignant neoplasm of esophagus, unspecified	K	Accepted
C160	Malignant neoplasm of cardia	K	Accepted
C161	Malignant neoplasm of fundus of stomach	K	Accepted
C162	Malignant neoplasm of body of stomach	K	Accepted
C163	Malignant neoplasm of pyloric antrum	K	Accepted
C164	Malignant neoplasm of pylorus	K	Accepted
C165	Malignant neoplasm of lesser curvature of stomach, unsp	K	Accepted
C166	Malignant neoplasm of greater curvature of stomach, unsp	K	Accepted
C168	Malignant neoplasm of overlapping sites of stomach	K	Accepted
C169	Malignant neoplasm of stomach, unspecified	K	Accepted
C170	Malignant neoplasm of duodenum	K	Accepted
C171	Malignant neoplasm of jejunum	K	Accepted
C172	Malignant neoplasm of ileum	K	Accepted
C173	Meckel's diverticulum, malignant	K	Accepted
C178	Malignant neoplasm of overlapping sites of small intestine	K	Accepted
C179	Malignant neoplasm of small intestine, unspecified	K	Accepted
C180	Malignant neoplasm of cecum	K	Accepted
C181	Malignant neoplasm of appendix	K	Accepted
C182	Malignant neoplasm of ascending colon	K	Accepted
C183	Malignant neoplasm of hepatic flexure	K	Accepted
C184	Malignant neoplasm of transverse colon	K	Accepted
C185	Malignant neoplasm of splenic flexure	K	Accepted
C186	Malignant neoplasm of descending colon	K	Accepted
C187	Malignant neoplasm of sigmoid colon	K	Accepted
C188	Malignant neoplasm of overlapping sites of colon	K	Accepted
C189	Malignant neoplasm of colon, unspecified	K	Accepted
C19	Malignant neoplasm of rectosigmoid junction	K	Accepted
C20	Malignant neoplasm of rectum	K	Accepted
C210	Malignant neoplasm of anus, unspecified	K	Accepted
C211	Malignant neoplasm of anal canal	K	Accepted
C212	Malignant neoplasm of cloacogenic zone	K	Accepted
C218	Malig neoplasm of ovrlp sites of rectum, anus and anal canal	K	Accepted
C220	Liver cell carcinoma	K	Accepted
C221	Intrahepatic bile duct carcinoma	K	Accepted
C222	Hepatoblastoma	K	Accepted
C223	Angiosarcoma of liver	K	Accepted
C224	Other sarcomas of liver	K	Accepted
C227	Other specified carcinomas of liver	K	Accepted
C228	Malignant neoplasm of liver, primary, unspecified as to type	K	Accepted
C229	Malig neoplasm of liver, not specified as primary or sec	K	Accepted
C23	Malignant neoplasm of gallbladder	K	Accepted
C240	Malignant neoplasm of extrahepatic bile duct	K	Accepted
C241	Malignant neoplasm of ampulla of Vater	K	Accepted
C248	Malignant neoplasm of overlapping sites of biliary tract	K	Accepted
C249	Malignant neoplasm of biliary tract, unspecified	K	Accepted
C250	Malignant neoplasm of head of pancreas	K	Accepted
C251	Malignant neoplasm of body of pancreas	K	Accepted
C252	Malignant neoplasm of tail of pancreas	K	Accepted
C253	Malignant neoplasm of pancreatic duct	K	Accepted
C254	Malignant neoplasm of endocrine pancreas	K	Accepted
C257	Malignant neoplasm of other parts of pancreas	K	Accepted
C258	Malignant neoplasm of overlapping sites of pancreas	K	Accepted
C259	Malignant neoplasm of pancreas, unspecified	K	Accepted
C260	Malignant neoplasm of intestinal tract, part unspecified	K	Accepted
C261	Malignant neoplasm of spleen	K	Accepted
C269	Malignant neoplasm of ill-defined sites within the dgstv sys	K	Accepted

Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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C15-C26 — Malignant neoplasms of digestive organs

Where these codes group

Every code in C15-C26

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