Skip to main content
Call AIBook a demo

ICD-10-CM K56.600: Partial intestinal obstruction, unspecified as to cause

K56.600 is the billable ICD-10-CM code for partial intestinal obstruction, unspecified as to cause, in category K56 (Paralytic ileus and intestinal obstruction without hernia) of the Other diseases of intestines section. As a principal diagnosis it groups to MS-DRG 388 Gastrointestinal Obstruction with MCC, MS-DRG 389 Gastrointestinal Obstruction with CC, MS-DRG 390 Gastrointestinal Obstruction without CC/MCC (MDC 06 MDC 06: Diseases and Disorders of the Digestive System); or MS-DRG 791 Prematurity with Major Problems, MS-DRG 793 Full Term Neonate with Major Problems (MDC 15 MDC 15: Newborns and Other Neonates with Conditions Originating in Perinatal Period). It maps to HCC 78 (Intestinal Obstruction/Perforation) in CMS-HCC V28. As a secondary diagnosis it is a CC, excluded with 29 principal diagnoses. 9 LCD billing and coding articles list it as covered.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
K56.600
billable FY2027 ICD-10-CM code
Category
K56 Paralytic ileus and intestinal obstruction without hernia
Chapter
11: Diseases of the digestive system (K00-K95)
CC/MCC (MS-DRG v44)
CC
CMS-HCC V28
HCC 78
POA reporting
Required

Tabular list notes for K56.600

The tabular list has no notes on K56.600 itself; the notes below apply from its parent headings.

Inherited from K56 (Paralytic ileus and intestinal obstruction without hernia)

Excludes1 (never coded together)
  • congenital stricture or stenosis of intestine (Q41-Q42)
  • cystic fibrosis with meconium ileus (E84.11)
  • ischemic stricture of intestine (K55.1)
  • meconium ileus NOS (P76.0)
  • neonatal intestinal obstructions classifiable to P76.-
  • obstruction of duodenum (K31.5)
  • postprocedural intestinal obstruction (K91.3-)
Excludes2 (not part of this condition, may be coded together)
  • stenosis of anus or rectum (K62.4)

MS-DRG grouping when K56.600 is the principal diagnosis

MS-DRG v44 groups for K56.600 as principal diagnosis
MDCMS-DRGs
06 MDC 06: Diseases and Disorders of the Digestive System388389390
15 MDC 15: Newborns and Other Neonates with Conditions Originating in Perinatal Period791793

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for K56.600 shows the full grouping logic.

CC/MCC status and inpatient edits

As a secondary diagnosis, K56.600 is a CC under MS-DRG v44, unless the principal diagnosis is one of the 29 codes in its exclusion list. Check K56.600 against a principal diagnosis.

  • Present on admission: a POA indicator is required on inpatient claims.

CMS-HCC V28 risk adjustment

In the PY2027 mapping, K56.600 maps to HCC 78 (Intestinal Obstruction/Perforation). The HCC lookup shows the RAF weight and the hierarchy.

LCD billing and coding articles that list K56.600

9 current Medicare billing and coding articles list K56.600 among the diagnoses that support medical necessity for the services they cover.

For teams evaluating QuickIntell software

Evaluate software for diagnosis coding review

If your team codes diagnoses at volume, review how QuickCode supports qualified coder review of documentation, specificity queries and the billing handoff. Confirm the code sets, settings and reviewer responsibilities during evaluation; a code reference is not a coding determination for a patient.

Evaluate QuickCode for diagnosis codingSee risk adjustment review
Book a software demoAsk about a software workflow

Optional software evaluation, not payer support or help with an individual claim. For coverage or payment decisions, use the official sources on this page. Do not include patient information in a demo booking or inquiry.

Frequently asked questions

What does ICD-10-CM K56.600 mean?

K56.600 means partial intestinal obstruction, unspecified as to cause. It is one of 16 billable codes under K56, paralytic ileus and intestinal obstruction without hernia.

Which MS-DRG does K56.600 group to?

As the principal diagnosis, K56.600 groups to MS-DRG 388 Gastrointestinal Obstruction with MCC, MS-DRG 389 Gastrointestinal Obstruction with CC, MS-DRG 390 Gastrointestinal Obstruction without CC/MCC (MDC 06 MDC 06: Diseases and Disorders of the Digestive System); or MS-DRG 791 Prematurity with Major Problems, MS-DRG 793 Full Term Neonate with Major Problems (MDC 15 MDC 15: Newborns and Other Neonates with Conditions Originating in Perinatal Period) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Does K56.600 map to an HCC?

Yes: HCC 78, Intestinal Obstruction/Perforation, in the PY2027 CMS-HCC V28 mapping.

Is K56.600 a CC or MCC?

K56.600 is a CC under MS-DRG v44; 29 principal diagnoses exclude it.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.