2026 ICD-10-CM Diagnosis Code Z89.421Acquired absence of other right toe(s)

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z89

ICD-10-CM Z89.421
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z89.421 is a billable ICD-10-CM diagnosis code for acquired absence of other right toe(s). 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
Z89.421
Billable Status
Yes — Valid for Submission
Code Describes
Acquired absence of other right toe(s)
Short Description
Acquired absence of other right toe(s)
Same as the full description in the CMS dataset.
Parent Code
Z89.42
Acquired absence of other toe(s)

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
CategoryZ89Acquired absence of limb
This CodeZ89.421Acquired absence of other right toe(s)

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z89.421.

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

Z89.421 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.

  • Amputated toe
  • Amputated toe of right foot
  • History of amputation of bilateral lesser toes
  • History of amputation of bilateral second toes
  • History of amputation of fifth toe
  • History of amputation of fourth toe
  • History of amputation of left little toe
  • History of amputation of left second toe
  • History of amputation of right lesser toe
  • History of amputation of right little toe
  • History of amputation of right second toe
  • History of amputation of second toe
  • History of amputation of third toe
  • History of bilateral fourth toe amputation
  • History of bilateral little toe amputation
  • History of bilateral third toe amputation
  • History of left fourth toe amputation
  • History of left third toe amputation
  • History of partial amputation of right toe
  • History of right fourth toe amputation
  • History of right third toe amputation

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

Patient EducationClinical

Toe Injuries and Disorders

Fourteen of the 26 bones in your feet are in your toes. The toes, particularly your big toe, help you move and keep your balance. Playing sports, running, stubbing your toe, and dropping something on your foot can damage your toes. Wearing shoes that are too loose or too tight can also cause toe problems.

Read the full article at MedlinePlus

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

Convert Z89.421 to ICD-9-CMHistory

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

ICD-9-CM
V49.72 Status amput othr toe(s)
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 Z89.421Overview

Is Z89.421 (Acquired absence of other toe(s)) a billable code?

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

Can Z89.421 be a principal diagnosis?

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

Is Z89.421 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 right toe(s) on inpatient claims.

What is the ICD-9 equivalent of Z89.421?

Under the General Equivalence Mappings, acquired absence of other right toe(s) converts to ICD-9-CM V49.72 (status amput othr toe(s)). The mapping is approximate, so confirm the match fits the documentation.