Z40 – Encounter for prophylactic surgery

ICD-10-CM 2027 diagnosis code · Encounters for other specific health care

Non-billable header

ICD-10-CM code Z40

Code: Z40 (claims format: Z40)
Description: Encounter for prophylactic surgery
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z40-Z53 Encounters for other specific health care

Billable codes under Z40

Z40 is a header code and cannot be used on claims. Choose the most specific code:

Z40.0 – Encounter for prophylactic surgery for risk factors related to malignant neoplasmsHeader (more codes below)
Z40.8 – Encounter for other prophylactic surgeryHeader (more codes below)
Z40.9 – Encounter for prophylactic surgery, unspecifiedBillable

Notes for Z40

Excludes1 (not coded here):

organ donations (Z52.-)
therapeutic organ removal-code to condition

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block Z40-Z53

Applicable to:

Categories Z40-Z53 are intended for use to indicate a reason for care. They may be used for patients who have already been treated for a disease or injury, but who are receiving aftercare or prophylactic care, or care to consolidate the treatment, or to deal with a residual state

Excludes2 (not included here):

follow-up examination for medical surveillance after treatment (Z08-Z09)

Frequently asked questions

What is ICD-10 code Z40?

Z40 is the ICD-10-CM code for encounter for prophylactic surgery, in the block Z40-Z53 (Encounters for other specific health care).

Is Z40 a billable code?

No. Z40 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.