2026 ICD-10-CM Diagnosis Code Z40Encounter for prophylactic surgery

ICD-10-CM Codes›Z00–Z99›Z40-Z53›Z40

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

Z40 is a non-billable ICD-10-CM category code for encounter for prophylactic surgery, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Z40.00, Z40.01, Z40.02, and Z40.03.

Code Identity

ICD-10-CM Code
Z40
Billable Status
No — Non-Billable Category
Code Describes
Encounter for prophylactic surgery
Short Description
Encounter for prophylactic surgery
Same as the full description in the CMS dataset.
Chapter
Z40-Z53
Encounters for other specific health care

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ40-Z53Encounters for other specific health care
CategoryZ40Encounter for prophylactic surgery
This CodeZ40Encounter for prophylactic surgery

Specific Coding for Encounter for prophylactic surgeryOverview

Non-specific codes like Z40 require more characters. Use one of these billable codes instead:

  • Z40.0 for Encounter for prophylactic surgery for risk factors related to malignant neoplasms

  • Use Z40.00 for Encounter for prophylactic removal of unspecified organ

  • Use Z40.01 for Encounter for prophylactic removal of breast

  • Use Z40.02 for Encounter for prophylactic removal of ovary(s)

  • Use Z40.03 for Encounter for prophylactic removal of fallopian tube(s)

  • Use Z40.09 for Encounter for prophylactic removal of other organ

  • Z40.8 for Encounter for other prophylactic surgery

  • Use Z40.81 for Encounter for prophylactic surgery for removal of ovary(s) for persons without known genetic/familial risk factors

  • Use Z40.82 for Encounter for prophylactic surgery for removal of fallopian tube(s) for persons without known genetic/familial risk factors

  • Use Z40.89 for Encounter for other prophylactic surgery

  • Use Z40.9 for Encounter for prophylactic surgery, unspecified

Tabular List NotesGuidance

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

Type 1 Excludes

  • organ donations Z52
  • therapeutic organ removal-code to condition

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 Z40Overview

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

No. This is a category header that groups the codes for encounter for prophylactic surgery, and headers cannot be submitted on claims. Claims for encounter for prophylactic surgery need a more specific code from this category, such as Z40.00, Z40.01, and Z40.02.