FY2027 ICD-10-CM reference
K51.412: Inflammatory polyps of colon with intestinal obstruction
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Inflammatory polyps of colon with intestinal obstruction. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: K00-K95 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: K00-K95 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: K00-K95 (chapter, inherited).
Excludes2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Source: K00-K95 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: K00-K95 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: K00-K95 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: K00-K95 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: K00-K95 (chapter, inherited).
Includes
noninfective inflammatory bowel disease
Source: K50-K52 (section, inherited).
Excludes1
irritable bowel syndrome (K58.-)
Source: K50-K52 (section, inherited).
Excludes1
megacolon (K59.3-)
Source: K50-K52 (section, inherited).
Instructional note
code to identify any associated fistulas, if applicable:
Source: K51 (category, inherited).
Instructional note
anal fistula (K60.3-)
Source: K51 (category, inherited).
Instructional note
anorectal fistula (K60.5-)
Source: K51 (category, inherited).
Instructional note
rectal fistula (K60.4-)
Source: K51 (category, inherited).
Instructional note
code to identify manifestations, such as:
Source: K51 (category, inherited).
Instructional note
pyoderma gangrenosum (L88)
Source: K51 (category, inherited).
Excludes1
Crohn's disease [regional enteritis] (K50.-)
Source: K51 (category, inherited).
Excludes2
adenomatous polyp of colon (D12.6)
Source: K51.4 (self, inherited).
Excludes2
polyposis of colon (D12.6)
Source: K51.4 (self, inherited).
Excludes2
polyps of colon NOS (K63.5)
Source: K51.4 (self, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does K51.412 mean in FY2027?
The official ICD-10-CM descriptor is Inflammatory polyps of colon with intestinal obstruction. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is K51.412 billable in FY2027?
The FY2027 order file marks K51.412 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does K51.412 map to an HCC?
In the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service), K51.412 maps to CMS-HCC V28 HCC 78 (Intestinal Obstruction/Perforation) and HCC 81 (Ulcerative Colitis). For 2027 dates of service, CMS has not yet published the payment year 2028 mappings. ESRD, RxHCC, PACE and HHS-HCC mappings are still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition