ICD-10-CM 2027 diagnosis code
K59.89Other specified functional intestinal disorders
K59.89 is a valid, billable ICD-10-CM code for other specified functional intestinal disorders. 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 Pseudo-obstruction intestine.
Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About K59.89
K59.89 is the ICD-10-CM diagnosis code for other specified functional intestinal disorders. It belongs to category K59 (other functional intestinal disorders), 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 K59.8, choose K59.89 (Other specified functional intestinal disorders) only when documentation doesn't support a more specific option: Ogilvie syndrome (K59.81).
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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), 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 was added in FY2021, effective October 1, 2020.
Coding notes
- Atony of colon
- Pseudo-obstruction (acute) (chronic) of intestine
Notes that apply from higher levels
Instructions written at a parent level also apply to K59.89.
Broader instructions also apply from Chapter 11: Diseases of the digestive system.
Alphabetic index entries
35 entriesTerms in the official ICD-10-CM index that lead to K59.89.
- Achalasia (cardia) (esophagus) › sphincteral NEC
- Atonia, atony, atonic › cecum
- Atonia, atony, atonic › intestine
- Contraction (s), contracture, contracted › anus
- Contraction (s), contracture, contracted › rectum, rectal (sphincter)
- Dilatation › anus
- Dilatation › duodenum
- Dilatation › ileum
- Dilatation › jejunum
- Disease, diseased › intestine › functional › specified NEC
- Dyskinesia › intestinal
- Dyspepsia › intestinal
- Hyperemia (acute) (passive) › enteric
- Hyperemia (acute) (passive) › intestine
- Hypofunction › intestinal
- Hypomotility › intestine
- Ileus (bowel) (colon) (inhibitory) (intestine) › myxedema
- Immobile, immobility › intestine
- Irritable, irritability › duodenum
- Irritable, irritability › ileum
- Irritable, irritability › jejunum
- Irritable, irritability › rectum
- Paralysis, paralytic (complete) (incomplete) › digestive organs NEC
- Pseudo-obstruction intestine (acute) (chronic) (idiopathic) (intermittent secondary) (primary)
- Spasm (s), spastic, spasticity › duodenum
- Stasis › cecum
- Stasis › colon
- Stasis › ileocecal coil
- Stasis › ileum
- Stasis › intestinal
- Stasis › jejunum
- Stasis › rectal
- Syndrome › hepatic flexure
- Syndrome › König's
- Syndrome › splenic › flexure
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.
MDC 06 · Diseases and Disorders of the Digestive System
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2021 (effective 10/1/2020): Added
- No changes since FY2021.
Common questions about K59.89
Is K59.89 billable?
- Yes. K59.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K59.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K59.89 as a principal diagnosis.
Is K59.89 a CC or MCC?
- No. K59.89 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does K59.89 group to?
- K59.89 is used in the MS-DRG v44.0 logic for MS-DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC) and MS-DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.