ICD-10-CM 2027 diagnosis code
Z90.10Acquired absence of unspecified breast and nipple
Z90.10 is a valid, billable ICD-10-CM code for acquired absence of unspecified breast and nipple. 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 Z90.10
Z90.10 is the ICD-10-CM diagnosis code for acquired absence of unspecified breast and nipple. It belongs to category Z90 (acquired absence of organs, not elsewhere classified), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) 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 Z90.1, choose Z90.10 (unspecified breast and nipple) only when documentation doesn't support a more specific option: right breast and nipple (Z90.11), left breast and nipple (Z90.12) and bilateral breasts and nipples (Z90.13).
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 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 V45.71 (acquired absence of breast and nipple).
Notes that apply from higher levels
Instructions written at a parent level also apply to Z90.10.
› From Z90 Acquired absence of organs, not elsewhere classified
- postprocedural or post-traumatic loss of body part NEC
- congenital absence - see Alphabetical Index
- postprocedural absence of endocrine glands (E89.-)
Broader instructions also apply from Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status and Chapter 21: Factors influencing health status and contact with health services.
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
ICD-9-CM equivalent
Converter →- V45.71Acquired absence of breast and nippleapproximate
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 Z90.10
Is Z90.10 billable?
- Yes. Z90.10 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z90.10 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z90.10 as a principal diagnosis.
Is Z90.10 a CC or MCC?
- No. Z90.10 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z90.10 group to?
- Z90.10 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.