2026 ICD-10-CM Diagnosis Code Z98.891History of uterine scar from previous surgery

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z98

ICD-10-CM Z98.891
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z98.891 is a billable ICD-10-CM diagnosis code for history of uterine scar from previous surgery. 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 Personal history of other disease.

Code Identity

ICD-10-CM Code
Z98.891
Billable Status
Yes — Valid for Submission
Code Describes
History of uterine scar from previous surgery
Short Description
History of uterine scar from previous surgery
Same as the full description in the CMS dataset.
Parent Code
Z98.89
Other specified postprocedural states

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
CategoryZ98Other postprocedural states
This CodeZ98.891History of uterine scar from previous surgery

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z98.891.

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

Z98.891 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • Maternal care due to uterine scar from previous surgery O34.2

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.

    • History
      • personal (of)
        • surgery NEC
          • with uterine scar
    • History
      • personal (of)
        • uterine scar from previous surgery
    • Status(post)
      • postoperative (postprocedural) NEC
        • uterine scar

Clinical ClassificationClinical

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

CCSR FAC030
Personal history of other disease
Default principal diagnosis: inpatient No · outpatient Yes

Convert Z98.891 to ICD-9-CMHistory

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

ICD-9-CM
V45.89 Post-proc states NEC
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement Z98.891 replaces the following previously assigned code(s):

  • Z98.89 - Other specified postprocedural states
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z98.891Overview

Is Z98.891 (Other specified postprocedural states) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report history of uterine scar from previous surgery on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z98.891 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because history of uterine scar from previous surgery describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z98.891 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 history of uterine scar from previous surgery on inpatient claims.

What is the ICD-9 equivalent of Z98.891?

Under the General Equivalence Mappings, history of uterine scar from previous surgery converts to ICD-9-CM V45.89 (post-proc states NEC). The mapping is approximate, so confirm the match fits the documentation.