ICD-10-CM 2027 diagnosis code
Z43.3Encounter for attention to colostomy
Z43.3 is a valid, billable ICD-10-CM code for encounter for attention to colostomy. 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 Z43.3
Z43.3 is the ICD-10-CM diagnosis code for encounter for attention to colostomy. It belongs to category Z43 (encounter for attention to artificial openings), block Z40-Z53 (Encounters for other specific health care) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Z43 (encounter for attention to artificial openings), Z43.3 is specifically for encounter for attention to colostomy. Related codes cover tracheostomy (Z43.0), gastrostomy (Z43.1), ileostomy (Z43.2), other artificial openings of digestive tract (Z43.4), cystostomy (Z43.5), other artificial openings of urinary tract (Z43.6), artificial vagina (Z43.7), other artificial openings (Z43.8) and 1 more.
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 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), 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 is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
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 V55.3 (attention to colostomy).
Notes that apply from higher levels
Instructions written at a parent level also apply to Z43.3.
› From Z43 Encounter for attention to artificial openings
- closure of artificial openings
- passage of sounds or bougies through artificial openings
- reforming artificial openings
- removal of catheter from artificial openings
- toilet or cleansing of artificial openings
Broader instructions also apply from Z40-Z53 Encounters for other specific health care and Chapter 21: Factors influencing health status and contact with health services.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to Z43.3.
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.
MDC 06 · Diseases and Disorders of the Digestive System
ICD-9-CM equivalent
Converter →- V55.3Attention to colostomyexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Z43.3
Is Z43.3 billable?
- Yes. Z43.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z43.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z43.3 as a principal diagnosis.
Is Z43.3 a CC or MCC?
- No. Z43.3 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z43.3 group to?
- Z43.3 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC) and MS-DRG 395 (Other Digestive System Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.