Encounter for prophylactic surgery (Z40) ICD-10-CM
The Z40 code range covers encounter for prophylactic surgery with 12 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- organ donations Z52
- therapeutic organ removal-code to condition
Codes in the Z40 Range 12 codes · 9 billable
- Z40 Encounter for prophylactic surgeryNon-billable
- Z40.0 Encounter for prophylactic surgery for risk factors related to malignant neoplasmsNon-billable
- Z40.00 Encounter for prophylactic removal of unspecified organ
- Z40.01 Encounter for prophylactic removal of breast
- Z40.02 Encounter for prophylactic removal of ovary(s)
- Z40.03 Encounter for prophylactic removal of fallopian tube(s)
- Z40.09 Encounter for prophylactic removal of other organ
- Z40.8 Encounter for other prophylactic surgeryNon-billable
- Z40.81 Encounter for prophylactic surgery for removal of ovary(s) for persons without known genetic/familial risk factors
- Z40.82 Encounter for prophylactic surgery for removal of fallopian tube(s) for persons without known genetic/familial risk factors
- Z40.89 Encounter for other prophylactic surgery
- Z40.9 Encounter for prophylactic surgery, unspecified
About the Z40 Code Range
These encounters involve preventive surgery, including surgery related to cancer risk factors. The codes describe the reason for the encounter, not a cancer diagnosis.
Z40.0 groups surgery related to cancer risk factors. Its subdivisions identify removal of the breast, ovaries, fallopian tubes, an unspecified organ, or another organ.
Z40.8 groups other preventive surgery. It separately identifies removal of ovaries or fallopian tubes in people without known genetic or family risk factors. Z40.9 identifies preventive surgery when the type is unspecified.
FY 2027 changes: The FY 2027 ICD-10-CM update, effective October 1, 2026, deleted Z40.8.
Questions About This Page
How many billable codes are in the Z40 range?
Of the 12 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the Z40 range classify?
The range classifies encounter for prophylactic surgery. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
