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ICD-10-CM 2027 diagnosis code

K91.5Postcholecystectomy syndrome

✓ Billable / specific

K91.5 is a valid, billable ICD-10-CM code for postcholecystectomy syndrome. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Postcholecystectomy syndrome.

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 K91.5

K91.5 is the ICD-10-CM diagnosis code for Postcholecystectomy syndrome. It belongs to category K91 (intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified), block K90-K95 (other diseases of the digestive system) 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 K91 (intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified), K91.5 is specifically for Postcholecystectomy syndrome. Related codes cover vomiting following gastrointestinal surgery (K91.0), Postgastric surgery syndromes (K91.1), postsurgical malabsorption, not elsewhere classified (K91.2), postprocedural intestinal obstruction (K91.3), intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedure (K91.6), accidental puncture and laceration of a digestive system organ or structure during a procedure (K91.7) and other intraoperative and postprocedural complications and disorders of digestive system (K91.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 444 (Disorders of the Biliary Tract with MCC, relative weight 1.6665), DRG 445 (Disorders of the Biliary Tract with CC, relative weight 1.0872) and DRG 446 (Disorders of the Biliary Tract without CC/MCC, relative weight 0.8124), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas), 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 576.0 (Postcholecystectomy syndrome).

Notes that apply from higher levels

Instructions written at a parent level also apply to K91.5.

› From K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
Excludes2
  • complications of artificial opening of digestive system (K94.-)
  • complications of bariatric procedures (K95.-)
  • gastrojejunal ulcer (K28.-)
  • postprocedural (radiation) retroperitoneal abscess (K68.11)
  • radiation colitis (K52.0)
  • radiation gastroenteritis (K52.0)
  • radiation proctitis (K62.7)

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

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to K91.5.

Codes whose notes reference K91.5

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 →
  • 576.0Postcholecystectomy syndromeexact

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 K91.5

Is K91.5 billable?

Yes. K91.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K91.5 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K91.5 as a principal diagnosis.

Is K91.5 a CC or MCC?

No. K91.5 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K91.5 group to?

K91.5 is used in the MS-DRG v44.0 logic for MS-DRG 444 (Disorders of the Biliary Tract with MCC), MS-DRG 445 (Disorders of the Biliary Tract with CC) and MS-DRG 446 (Disorders of the Biliary Tract 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 K91.5?

The CMS General Equivalence Mappings map K91.5 to ICD-9-CM 576.0.