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ICD-10-CM 2027 diagnosis code

K56.3Gallstone ileus

✓ Billable / specificCC — complication/comorbidity

K56.3 is a valid, billable ICD-10-CM code for gallstone ileus. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K56.3

K56.3 is the ICD-10-CM diagnosis code for Gallstone ileus. It belongs to category K56 (paralytic ileus and intestinal obstruction without hernia), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within K56 (paralytic ileus and intestinal obstruction without hernia), K56.3 is specifically for Gallstone ileus. Related codes cover paralytic ileus (K56.0), intussusception (K56.1), Volvulus (K56.2), other impaction of intestine (K56.4), intestinal adhesions [bands] with obstruction (postinfection) (K56.5), other and unspecified intestinal obstruction (K56.6) and ileus, unspecified (K56.7).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 388 (Gastrointestinal Obstruction with MCC, relative weight 1.4709), DRG 389 (Gastrointestinal Obstruction with CC, relative weight 0.7891) and DRG 390 (Gastrointestinal Obstruction without CC/MCC, relative weight 0.5404), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 560.31 (Gallstone ileus).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Obstruction of intestine by gallstone

Notes that apply from higher levels

Instructions written at a parent level also apply to K56.3.

› From K56 Paralytic ileus and intestinal obstruction without hernia
Excludes1
  • 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
  • stenosis of anus or rectum (K62.4)

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Alphabetic index entries

7 entries

Terms in the official ICD-10-CM index that lead to K56.3.

Codes whose notes reference K56.3

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K56.3

Is K56.3 billable?

Yes. K56.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K56.3 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K56.3 as a principal diagnosis.

Is K56.3 a CC or MCC?

K56.3 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does K56.3 group to?

K56.3 is used in the MS-DRG v44.0 logic for MS-DRG 388 (Gastrointestinal Obstruction with MCC), MS-DRG 389 (Gastrointestinal Obstruction with CC) and MS-DRG 390 (Gastrointestinal Obstruction without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for K56.3?

The CMS General Equivalence Mappings map K56.3 to ICD-9-CM 560.31.