Ectopic pregnancy (O00) ICD-10-CM
The O00 code range covers ectopic pregnancy with 51 ICD-10-CM diagnosis codes. 34 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- ruptured ectopic pregnancy
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code from category O08
Codes in the O00 Range 51 codes · 34 billable
- O00 Ectopic pregnancyNon-billable
- O00.0 Abdominal pregnancyNon-billable
- O00.00 Abdominal pregnancy without intrauterine pregnancy
- O00.01 Abdominal pregnancy with intrauterine pregnancy
- O00.1 Tubal pregnancyNon-billable
- O00.10 Tubal pregnancy without intrauterine pregnancyNon-billable
- O00.101 Right tubal pregnancy without intrauterine pregnancy
- O00.102 Left tubal pregnancy without intrauterine pregnancy
- O00.109 Unspecified tubal pregnancy without intrauterine pregnancy
- O00.11 Tubal pregnancy with intrauterine pregnancyNon-billable
- O00.111 Right tubal pregnancy with intrauterine pregnancy
- O00.112 Left tubal pregnancy with intrauterine pregnancy
- O00.119 Unspecified tubal pregnancy with intrauterine pregnancy
- O00.12 Interstitial ectopic pregnancy without intrauterine pregnancyNon-billable
- O00.121 Right interstitial ectopic pregnancy without intrauterine pregnancy New
- O00.122 Left interstitial ectopic pregnancy without intrauterine pregnancy New
- O00.129 Unspecified interstitial ectopic pregnancy without intrauterine pregnancy New
- O00.13 Interstitial ectopic pregnancy with intrauterine pregnancyNon-billable
- O00.131 Right interstitial ectopic pregnancy with intrauterine pregnancy New
- O00.132 Left interstitial ectopic pregnancy with intrauterine pregnancy New
- O00.139 Unspecified interstitial ectopic pregnancy with intrauterine pregnancy New
- O00.2 Ovarian pregnancyNon-billable
- O00.20 Ovarian pregnancy without intrauterine pregnancyNon-billable
- O00.201 Right ovarian pregnancy without intrauterine pregnancy
- O00.202 Left ovarian pregnancy without intrauterine pregnancy
- O00.209 Unspecified ovarian pregnancy without intrauterine pregnancy
- O00.21 Ovarian pregnancy with intrauterine pregnancyNon-billable
- O00.211 Right ovarian pregnancy with intrauterine pregnancy
- O00.212 Left ovarian pregnancy with intrauterine pregnancy
- O00.219 Unspecified ovarian pregnancy with intrauterine pregnancy
- O00.3 Cesarean scar ectopic pregnancyNon-billable
- O00.31 Cesarean scar ectopic pregnancy without intrauterine pregnancy New
- O00.32 Cesarean scar ectopic pregnancy with intrauterine pregnancy New
- O00.4 Cervical ectopic pregnancyNon-billable
- O00.41 Cervical ectopic pregnancy without intrauterine pregnancy New
- O00.42 Cervical ectopic pregnancy with intrauterine pregnancy New
- O00.5 Cornual ectopic pregnancyNon-billable
- O00.51 Cornual ectopic pregnancy without intrauterine pregnancyNon-billable
- O00.511 Right cornual ectopic pregnancy without intrauterine pregnancy New
- O00.512 Left cornual ectopic pregnancy without intrauterine pregnancy New
- O00.519 Unspecified cornual ectopic pregnancy without intrauterine pregnancy New
- O00.52 Cornual ectopic pregnancy with intrauterine pregnancyNon-billable
- O00.521 Right cornual ectopic pregnancy with intrauterine pregnancy New
- O00.522 Left cornual ectopic pregnancy with intrauterine pregnancy New
- O00.529 Unspecified cornual ectopic pregnancy with intrauterine pregnancy New
- O00.8 Other ectopic pregnancyNon-billable
- O00.80 Other ectopic pregnancy without intrauterine pregnancy
- O00.81 Other ectopic pregnancy with intrauterine pregnancy
- O00.9 Ectopic pregnancy, unspecifiedNon-billable
- O00.90 Unspecified ectopic pregnancy without intrauterine pregnancy
- O00.91 Unspecified ectopic pregnancy with intrauterine pregnancy
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the O00 range.
Pregnancy, Abdominal
A type of ectopic pregnancy in which the EMBRYO, MAMMALIAN implants in the ABDOMINAL CAVITY instead of in the ENDOMETRIUM of the UTERUS.
Pregnancy, Ectopic
A potentially life-threatening condition in which EMBRYO IMPLANTATION occurs outside the cavity of the UTERUS. Most ectopic pregnancies (>96%) occur in the FALLOPIAN TUBES, known as TUBAL PREGNANCY. They can be in other locations, such as UTERINE CERVIX; OVARY; and abdominal cavity (PREGNANCY, ABDOMINAL).
Pregnancy, Ovarian
A type of pregnancy in which EMBRYO IMPLANTATION occurs in an OVARY instead of in the uterine cavity.
Pregnancy, Tubal
The most common (>96%) type of ectopic pregnancy in which the extrauterine EMBRYO IMPLANTATION occurs in the FALLOPIAN TUBE, usually in the ampullary region where FERTILIZATION takes place.
About the O00 Code Range
An ectopic pregnancy occurs when an embryo implants outside the cavity of the uterus. The codes distinguish where implantation occurs and whether an intrauterine pregnancy is also present.
The location branches are abdominal (O00.0), tubal (O00.1), ovarian (O00.2), cesarean scar (O00.3), cervical (O00.4) and cornual (O00.5). The tubal branch also has subdivisions for interstitial ectopic pregnancy. Tubal, interstitial, ovarian and cornual subdivisions further distinguish right, left or unspecified side. Other and unspecified ectopic pregnancies have separate branches.
FY 2027 changes: The FY 2027 ICD-10-CM update, effective October 1, 2026, added O00.121, O00.122, O00.129, O00.131, O00.132, O00.139, O00.31, O00.32, O00.41, O00.42, O00.511, O00.512 and 4 other codes.
Questions About This Page
How many billable codes are in the O00 range?
Of the 51 codes in this range, 34 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the O00 range classify?
The range classifies ectopic pregnancy. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
