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ICD-10-CM 2027 diagnosis code

Z05.89Observation and evaluation of newborn for other specified suspected condition ruled out

✓ Billable / specificPOA exemptNewborn · age 0

Z05.89 is a valid, billable ICD-10-CM code for observation and evaluation of newborn for other specified suspected condition ruled out. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Obs & eval of NB for oth suspected condition ruled out

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 Z05.89

Z05.89 is the ICD-10-CM diagnosis code for observation and evaluation of newborn for other specified suspected condition ruled out. It belongs to category Z05 (encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out), block Z00-Z13 (persons encountering health services for examinations) 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 Z05.8, choose Z05.89 (other specified suspected condition ruled out) only when documentation doesn't support a more specific option: suspected condition related to home physiologic monitoring device ruled out (Z05.81).

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 795 (Normal Newborn, relative weight 0.2022) and DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and 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.

The Medicare Code Editor expects this diagnosis only for newborns (age 0); reporting it for an older patient triggers an age-conflict edit.

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 Z05.89.

Broader instructions also apply from Z00-Z13 Persons encountering health services for examinations and 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 Z05.89.

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 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

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 Z05.89

Is Z05.89 billable?

Yes. Z05.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Z05.89 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Z05.89 as a principal diagnosis.

Is Z05.89 a CC or MCC?

No. Z05.89 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does Z05.89 group to?

Z05.89 is used in the MS-DRG v44.0 logic for MS-DRG 795 (Normal Newborn) and 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.