2026 ICD-10-CM Diagnosis Code Z90.10Acquired absence of unspecified breast and nipple

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z90

ICD-10-CM Z90.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z90.10 is a billable ICD-10-CM diagnosis code for acquired absence of unspecified breast and nipple. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acquired absence of limb or organ.

Code Identity

ICD-10-CM Code
Z90.10
Billable Status
Yes — Valid for Submission
Code Describes
Acquired absence of unspecified breast and nipple
Short Description
Acquired absence of unspecified breast and nipple
Same as the full description in the CMS dataset.
Parent Code
Z90.1
Acquired absence of breast and nipple

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ90Acquired absence of organs, not elsewhere classified
This CodeZ90.10Acquired absence of unspecified breast and nipple

Present on Admission (POA)Billing

Z90.10 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Absence of breast
  • Acquired absence of breast
  • Acquired partial absence of breast
  • Acquired total absence of breast
  • Acute pain following mastectomy
  • Acute postoperative pain
  • Chronic pain following breast surgery
  • History of mastectomy
  • History of prophylactic mastectomy
  • Post-mastectomy breast deformity
  • Post-mastectomy chronic pain syndrome
  • Post-mastectomy pain

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC022
Acquired absence of limb or organ
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Acquired Absence of Breast

    the absence of one or more breasts, the cause of which is not present at birth.

Patient EducationClinical

Mastectomy

A mastectomy is surgery to remove part or all of the breast. It's usually done to treat breast cancer by removing the cancer. A mastectomy may be the first treatment option for some types of breast cancer or done after chemotherapy for other types.

The full article covers:

  • What is a mastectomy?
  • What are the different types of mastectomies?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z90.10 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V45.71 Acq absnce breast/nipple
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z90.10Overview

Is Z90.10 (Acquired absence of breast and nipple) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acquired absence of unspecified breast and nipple on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is Z90.10 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for acquired absence of unspecified breast and nipple on inpatient claims.

What is the ICD-9 equivalent of Z90.10?

Under the General Equivalence Mappings, acquired absence of unspecified breast and nipple converts to ICD-9-CM V45.71 (acq absnce breast/nipple). The mapping is approximate, so confirm the match fits the documentation.