Skip to content
Dx

ICD-10-CM 2027 diagnosis code

Z22.359Carrier of Enterobacterales, unspecified

✓ Billable / specificPOA exemptNot a principal dx

Z22.359 is a valid, billable ICD-10-CM code for carrier of enterobacterales, unspecified. 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 Enterobacterales carrier of.

Code last changed in FY2024 (effective October 1, 2023). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z22.359

Z22.359 is the ICD-10-CM diagnosis code for carrier of Enterobacterales, unspecified. It belongs to category Z22 (carrier of infectious disease), block Z20-Z29 (persons with potential health hazards related to communicable diseases) 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 Z22.35, choose Z22.359 (unspecified) only when documentation doesn't support a more specific option: carbapenem-resistant Enterobacterales (Z22.350) and other Enterobacterales (Z22.358).

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 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), 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 not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It was added in FY2024, effective October 1, 2023.

Notes that apply from higher levels

Instructions written at a parent level also apply to Z22.359.

› From Z22 Carrier of infectious disease
Includes
  • colonization status
  • suspected carrier
Excludes2
  • carrier of viral hepatitis (B18.-)

Broader instructions also apply from Chapter 21: Factors influencing health status and contact with health services.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to Z22.359.

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 23 · Factors Influencing Health Status and Other Contacts with Health Services

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
  • FY2024 (effective 10/1/2023): Added
  • No changes since FY2024.

Common questions about Z22.359

Is Z22.359 billable?

Yes. Z22.359 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Z22.359 be used as a principal diagnosis?

No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

Is Z22.359 a CC or MCC?

No. Z22.359 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does Z22.359 group to?

Z22.359 is used in the MS-DRG v44.0 logic for MS-DRG 951 (Other Factors Influencing Health Status). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.