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  6. 2026 ICD-10-CM Code N80

2026 ICD-10-CM Diagnosis Code N80

Endometriosis

ICD-10-CM Code:
N80
ICD-10 Code for:
Endometriosis
Is Billable?
Not Valid for Submission
Code Navigator:

N80 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of endometriosis. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Endometriosis

Non-specific codes like N80 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for endometriosis:

  • 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

Code Classification

  • Diseases of the genitourinary system
    N00–N99
    • Noninflammatory disorders of female genital tract
      N80-N98
      • Endometriosis
        N80

Clinical Information

  • 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 Education


Endometriosis

What is 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:

  • On or under the ovaries
  • On the fallopian tubes, which carry eggs from the ovaries to the uterus
  • Behind the uterus
  • On the tissues that hold the uterus in place
  • On the bowels or bladder

In rare cases, the tissue may grow on your lungs or in other parts of your body.

What causes endometriosis?

Researchers don't know what causes endometriosis.

Who is at risk for endometriosis?

Endometriosis can affect anyone who menstruates. Certain factors can raise or lower your risk of getting it.

You are at higher risk if:

  • You have a mother, sister, or daughter with endometriosis
  • Your period started before age 11
  • Your monthly cycles are short (less than 27 days)
  • Your menstrual cycles are heavy and last more than 7 days

You have a lower risk if:

  • You have been pregnant before
  • Your periods started late in adolescence
  • You breastfeed your babies

What are the symptoms of endometriosis?

The main symptoms of endometriosis are:

  • Pelvic pain, which often happens during your period
  • Infertility

Other possible symptoms include:

  • Painful menstrual cramps, which may get worse over time
  • Pain during or after sex
  • Pain in the intestine or lower abdomen
  • Pain with bowel movements (pooping) or urination (peeing), usually during your period
  • Heavy periods
  • Spotting or bleeding between periods
  • Digestive or gastrointestinal symptoms
  • Fatigue or lack of energy

How is endometriosis diagnosed?

Surgery is the only way to know for sure that you have endometriosis. First, however, your health care provider will ask about your symptoms and medical history. You will have a pelvic exam and may have some imaging tests.

The most common surgery to diagnose endometriosis is a laparoscopy. This is a type of surgery that uses a laparoscope, a thin tube with a camera and light. The surgeon inserts the laparoscope through a small cut in the skin near your belly button. Your provider can make a diagnosis based on how the patches of endometriosis look. They may also do a biopsy to get a tissue sample.

What are the treatments for endometriosis?

There is no cure for endometriosis, but there are treatments for the symptoms. Your provider will work with you to decide which treatments would be best for you.

Treatments for endometriosis pain include:

  • Pain relievers, including nonsteroidal anti-inflammatory drugs (NSAIDS) such as ibuprofen and a prescription medicine specifically for endometriosis. Providers may sometimes prescribe opioids for severe pain.
  • Hormone therapy, which stops the ovaries from making hormones. This may slow the growth of the endometrial tissue and may stop new areas from growing. Types of hormone therapy include:
    • Birth control pills.
    • Progestin therapy.
    • Gonadotropin-releasing hormone (GnRH) medicines (GnRH agonists and antagonists). These medicines cause a temporary menopause. After your stop taking the medicines, your menstrual periods will start again, and pregnancy is possible.
  • Surgical treatments for severe pain, including procedures to remove the endometriosis patches or cut some nerves in the pelvis. The surgery may be a laparoscopy or major surgery.

Treatments for infertility caused by endometriosis include:

  • Laparoscopy to remove the endometriosis patches
  • In vitro fertilization

    • NIH: National Institute of Child Health and Human Development


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.