ICD-10-CM 2027 diagnosis code

N80.12Deep endometriosis of ovary

Not billable — use a more specific code

N80.12 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Looking up by condition? See ICD-10 code for Endometrioma.

Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N80.12

N80.12 is the ICD-10-CM diagnosis code for deep endometriosis of ovary. It belongs to category N80 (endometriosis), block N80-N98 (noninflammatory disorders of female genital tract) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within N80.1 (endometriosis of ovary), N80.12 is specifically for deep endometriosis of ovary. Related codes cover unspecified depth (N80.10) and superficial endometriosis of the ovary (N80.11).

To report this condition, pick the subcode that matches the documentation: N80.121 (ovary), N80.122 (ovary), N80.123 (ovaries) and N80.129 (unspecified ovary).

It was added in FY2023, effective October 1, 2022.

Specific codes under N80.12

Coding notes

Applicable toConditions and synonyms classified to this code

Deep ovarian endometriosis
Endometrioma

Notes that apply from higher levels

Instructions written at a parent level also apply to N80.12.

Broader instructions also apply from Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to N80.12.

Code history

2016
2017
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2020
2021
2022
2023
2024
2025
2026
2027

FY2023 (effective 10/1/2022): Added
No changes since FY2023.

Common questions about N80.12

Is N80.12 billable?: No. N80.12 is a header code. Report one of its more specific subcodes instead.