2026 ICD-10-CM Diagnosis Code Z40.89Encounter for other prophylactic surgery

ICD-10-CM Codes›Z00–Z99›Z40-Z53›Z40

ICD-10-CM Z40.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z40.89 is a billable ICD-10-CM diagnosis code for encounter for other prophylactic 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.

Code Identity

ICD-10-CM Code
Z40.89
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for other prophylactic surgery
Short Description
Encounter for other prophylactic surgery
Same as the full description in the CMS dataset.
Parent Code
Z40.8
Encounter for other prophylactic surgery

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ40-Z53Encounters for other specific health care
CategoryZ40Encounter for prophylactic surgery
This CodeZ40.89Encounter for other prophylactic surgery

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z40.89.

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

Z40.89 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

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.

    • Prophylactic
      • surgery
        • specified NEC

Code History & ChangesHistory

New Code Z40.89 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.

Replaced This code was replaced in the FY 2026 code set by:

  • Z80.44 - Family history of malignant neoplasm of fallopian tube(s)

Replacement Z40.89 replaces the following previously assigned code(s):

  • Z40.8 - Encounter for other prophylactic surgery
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2026CurrentRevised in the current code setEffective October 1, 2025 through September 30, 2026.

Questions About Z40.89Overview

Is Z40.89 (Encounter for other prophylactic surgery) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for other prophylactic surgery on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z40.89 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for other prophylactic surgery describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z40.89 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 encounter for other prophylactic surgery on inpatient claims.