2026 ICD-10-CM Diagnosis Code Z90.89Acquired absence of other organs

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z90

ICD-10-CM Z90.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z90.89 is a billable ICD-10-CM diagnosis code for acquired absence of other organs. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and 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
Z90.89
Billable Status
Yes — Valid for Submission
Code Describes
Acquired absence of other organs
Short Description
Acquired absence of other organs
Same as the full description in the CMS dataset.
Parent Code
Z90.8
Acquired absence of other organs

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 CodeZ90.89Acquired absence of other organs

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z90.89.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z90.89 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 rib
  • Acquired absence of organ
  • Acquired absence of pulmonary artery
  • Acquired absence of pulmonary trunk
  • History of adenectomy
  • History of cervical laminectomy
  • History of excision of endocrine gland
  • History of excision of lamina of lumbar vertebra for decompression of spinal cord
  • History of excision of thymus
  • History of laminectomy
  • History of lumbar laminectomy
  • History of operative procedure on lumbar spinal structure
  • History of operative procedure on thoracic spinal structure
  • History of osteotomy
  • History of parathyroidectomy
  • History of pericardiectomy
  • History of resection of sternum
  • History of surgical procedure on cervical spine
  • History of thoracic laminectomy
  • History of thyroid lobectomy
  • History of thyroidectomy
  • History of total thyroidectomy

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Absence(of) (organ or part) (complete or partial)
      • organ
        • or site, congenital NEC
          • acquired NEC
    • Absence(of) (organ or part) (complete or partial)
      • rib (acquired)

Clinical ClassificationClinical

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

CCSR FAC022
Acquired absence of limb or organ
Default principal diagnosis: inpatient No · outpatient Yes

Clinical InformationClinical

  • Acquired Absence of Organ

    the absence of an organ, the cause of which is not present at birth.

Convert Z90.89 to ICD-9-CMHistory

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

ICD-9-CM
V45.79 Acq absence of organ NEC
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 Z90.89Overview

Is Z90.89 (Acquired absence of other organs) a billable code?

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

Can Z90.89 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because acquired absence of other organs describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z90.89 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 other organs on inpatient claims.

What is the ICD-9 equivalent of Z90.89?

Under the General Equivalence Mappings, acquired absence of other organs converts to ICD-9-CM V45.79 (acq absence of organ NEC). The mapping is approximate, so confirm the match fits the documentation.