2026 ICD-10-CM Diagnosis Code O00.20

Specific Coding Applicable to Ovarian pregnancy without intrauterine pregnancy

Non-specific codes like O00.20 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for ovarian pregnancy without intrauterine pregnancy:

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Clinical Information

• Ovarian Pregnancy

  an abnormal pregnancy in which the conception is implanted on the ovary.

Replacement Code

O0020 replaces the following previously assigned ICD-10-CM code(s):

• O00.2 - Ovarian pregnancy

Patient Education

Ectopic Pregnancy

What is an ectopic pregnancy?

The uterus, or womb, is the place where a fetus grows during pregnancy. In an ectopic pregnancy, the fertilized egg grows in the wrong place outside the uterus. It usually occurs in the fallopian tubes. These tubes carry eggs from the ovaries to the uterus. Sometimes, an ectopic pregnancy can occur in the ovaries, abdominal cavity, or the lower part of the uterus (cervix).

Ectopic pregnancies can't end in a healthy pregnancy because the egg cannot grow. If the pregnancy continues, the fallopian tube can burst. This can cause internal bleeding, which can be a life-threatening emergency that needs immediate surgery.

What increases my risk of an ectopic pregnancy?

An ectopic pregnancy often happens because there is a problem with your fallopian tubes. But sometimes it's not clear why an ectopic pregnancy happens.

Factors that may increase your risk for an ectopic pregnancy can include:

• Previous ectopic pregnancy
• Prior pelvic, abdominal, or fallopian tube surgery
• Certain sexually transmitted infections (STIs)
• Pelvic inflammatory disease
• Endometriosis
• Becoming pregnant while using an intrauterine device (IUD) for birth control
• Becoming pregnant after a tubal ligation

Other factors that may increase your risk can include:

• Smoking
• Being older than age 35
• Infertility treatments

What are the symptoms of an ectopic pregnancy?

You may not notice any symptoms at first. Or you may have some of the usual signs of pregnancy such as a missed period, breast tenderness, or nausea.

Early signs of an ectopic pregnancy may be light vaginal bleeding and pelvic pain. Ectopic pregnancy can be a medical emergency. Get medical care right away if you have these signs:

• Abdominal (belly) pain
• Shoulder pain
• Vaginal bleeding
• Feeling dizzy or faint

How is an ectopic pregnancy diagnosed?

An ectopic pregnancy can't be diagnosed without blood tests and an ultrasound. Your health care provider will do a pregnancy test to confirm that you're pregnant. They may do a pelvic exam to check for areas of pain, tenderness, or a mass.

What is the treatment for an ectopic pregnancy?

An ectopic pregnancy needs treatment to stop any damage to your organs. Your provider will use medicine or surgery to take out the ectopic tissue.

Losing a pregnancy can be devastating. An ectopic pregnancy is like a miscarriage, but it must be treated to prevent problems. People cope with grief in different ways. It may be helpful to discuss your feelings with your provider or a counselor. Many women who have had ectopic pregnancies go on to have healthy pregnancies later.

Dept. of Health and Human Services Office on Women's Health

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