2027 ICD-10-CM Diagnosis Code N80Endometriosis

ICD-10-CM Codes›N00–N99›N80-N98›N80

ICD-10-CM N80
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N80 is a non-billable ICD-10-CM category code for endometriosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N80.00, N80.01, N80.02, and N80.03.

Code Identity

ICD-10-CM Code
N80
Billable Status
No — Non-Billable Category
Code Describes
Endometriosis
Short Description
Endometriosis
Same as the full description in the CMS dataset.
Chapter
N80-N98
Noninflammatory disorders of female genital tract

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN80Endometriosis
This CodeN80Endometriosis

Specific Coding for EndometriosisOverview

Non-specific codes like N80 require more characters. Use one of these billable codes instead:

  • N80.0 for Endometriosis of uterus

  • Use N80.00 for Endometriosis of the uterus, unspecified

  • Use N80.01 for Superficial endometriosis of the uterus

  • Use N80.02 for Deep endometriosis of the uterus

  • Use N80.03 for Adenomyosis of the uterus

  • N80.1 for Endometriosis of ovary

  • N80.10 for Endometriosis of ovary, unspecified depth

  • N80.11 for Superficial endometriosis of the ovary

  • N80.12 for Deep endometriosis of ovary

  • N80.2 for Endometriosis of fallopian tube

  • N80.20 for Endometriosis of fallopian tube, unspecified depth

  • N80.21 for Superficial endometriosis of fallopian tube

  • N80.22 for Deep endometriosis of the fallopian tube

  • N80.3 for Endometriosis of pelvic peritoneum

  • Use N80.30 for Endometriosis of pelvic peritoneum, unspecified

  • N80.31 for Endometriosis of the anterior cul-de-sac

  • N80.32 for Endometriosis of the posterior cul-de-sac

  • N80.33 for Superficial endometriosis of the pelvic sidewall

  • N80.34 for Deep endometriosis of the pelvic sidewall

  • N80.35 for Endometriosis of the pelvic sidewall, unspecified depth

  • N80.36 for Superficial endometriosis of the pelvic brim

  • N80.37 for Deep endometriosis of the pelvic brim

  • N80.38 for Endometriosis of the pelvic brim, unspecified depth

  • N80.39 for Endometriosis of other pelvic peritoneum

  • N80.3A for Superficial endometriosis of the uterosacral ligament(s)

  • N80.3B for Deep endometriosis of the uterosacral ligament(s)

  • N80.3C for Endometriosis of the uterosacral ligament(s), unspecified depth

  • N80.4 for Endometriosis of rectovaginal septum and vagina

  • Use N80.40 for Endometriosis of rectovaginal septum, unspecified involvement of vagina

  • Use N80.41 for Endometriosis of rectovaginal septum without involvement of vagina

  • Use N80.42 for Endometriosis of rectovaginal septum with involvement of vagina

  • N80.5 for Endometriosis of intestine

  • Use N80.50 for Endometriosis of intestine, unspecified

  • N80.51 for Endometriosis of the rectum

  • N80.52 for Endometriosis of the sigmoid colon

  • N80.53 for Endometriosis of the cecum

  • N80.54 for Endometriosis of the appendix

  • N80.55 for Endometriosis of other parts of the colon

  • N80.56 for Endometriosis of the small intestine

  • Use N80.6 for Endometriosis in cutaneous scar

  • Use N80.8 for Other endometriosis

  • Use N80.9 for Endometriosis, unspecified

  • N80.A for Endometriosis of bladder and ureters

  • Use N80.A0 for Endometriosis of bladder, unspecified depth

  • Use N80.A1 for Superficial endometriosis of bladder

  • Use N80.A2 for Deep endometriosis of bladder

  • N80.A4 for Superficial endometriosis of ureter

  • N80.A5 for Deep endometriosis of ureter

  • N80.A6 for Endometriosis of ureter, unspecified depth

  • N80.B for Endometriosis of cardiothoracic space

  • Use N80.B1 for Endometriosis of pleura

  • Use N80.B2 for Endometriosis of lung

  • N80.B3 for Endometriosis of diaphragm

  • Use N80.B4 for Endometriosis of the pericardial space

  • Use N80.B5 for Endometriosis of the mediastinal space

  • Use N80.B6 for Endometriosis of cardiothoracic space

  • N80.C for Endometriosis of the abdomen

  • Use N80.C0 for Endometriosis of the abdomen, unspecified

  • N80.C1 for Endometriosis of the anterior abdominal wall

  • Use N80.C2 for Endometriosis of the umbilicus

  • Use N80.C3 for Endometriosis of the inguinal canal

  • Use N80.C4 for Endometriosis of extra-pelvic abdominal peritoneum

  • Use N80.C9 for Endometriosis of other site of abdomen

  • N80.D for Endometriosis of the pelvic nerves

  • Use N80.D0 for Endometriosis of the pelvic nerves, unspecified

  • Use N80.D1 for Endometriosis of the sacral splanchnic nerves

  • Use N80.D2 for Endometriosis of the sacral nerve roots

  • Use N80.D3 for Endometriosis of the obturator nerve

  • Use N80.D4 for Endometriosis of the sciatic nerve

  • Use N80.D5 for Endometriosis of the pudendal nerve

  • Use N80.D6 for Endometriosis of the femoral nerve

  • Use N80.D9 for Endometriosis of other pelvic nerve

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N80: its own notes plus those printed at Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N80, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming N80: they are not reported together with it, unless the two conditions are unrelated.

  • N85 Other noninflammatory disorders of uterus, except cervix
    endometriosis (N80.-)

Clinical InformationClinical

  • Endometriosis

    a condition in which functional endometrial tissue is present outside the uterus. it is often confined to the pelvis involving the ovary, the ligaments, cul-de-sac, and the uterovesical peritoneum.

Patient EducationClinical

Endometriosis

The uterus, or womb, is the place where a fetus grows during pregnancy. The uterus is lined with tissue (endometrium). Endometriosis is a disease in which tissue like the lining of the uterus grows in other places in your body. These patches of tissue are called "implants," "nodules," or "lesions." They are most often found:

The full article covers:

  • What is endometriosis?
  • What causes endometriosis?
  • Who is at risk for endometriosis?
  • What are the symptoms of endometriosis?
  • How is endometriosis diagnosed?
  • What are the treatments for endometriosis?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N80Overview

What is the ICD-10 code for endometriosis?

N80 is the ICD-10-CM category for endometriosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is N80 (Endometriosis) a billable code?

No. This is a category header that groups the codes for endometriosis, and headers cannot be submitted on claims. Claims for endometriosis need a more specific code from this category, such as N80.00, N80.01, and N80.02.