N80.9 — Endometriosis, unspecified

N80.9

ICD-10 Chapter 14: Genitourinary System — illustrative image — Chapter 14: Diseases of the genitourinary system (N00–N99) — illustrative image

What this code means

Endometriosis is a condition in which tissue like the womb lining grows outside the uterus, causing pain and sometimes infertility.

Also called: endometriosis.

When this code is used

Used for endometriosis when the site is not specified.

Where it sits in ICD-10-CM

Code N80.9 belongs to Chapter 14: Diseases of the genitourinary system, which covers codes N00–N99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Learn more about this condition

Condition guide: Fertility

Related symptoms

Abdominal pain

Related anatomy

Uterus

Watch: related videos

▶ WatchEndometriosis ▶ WatchEndometriosis excision ▶ WatchRectal resection for endometriosis

Frequently asked questions

What is ICD-10-CM code N80.9?

N80.9 is the ICD-10-CM diagnosis code for “Endometriosis, unspecified”. Endometriosis is a condition in which tissue like the womb lining grows outside the uterus, causing pain and sometimes infertility.

When is code N80.9 used?

Used for endometriosis when the site is not specified. It belongs to Chapter 14 of ICD-10-CM (Diseases of the genitourinary system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.