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ICD-10-CM 2027 diagnosis code

O00.9Ectopic pregnancy, unspecified

Not billable — use a more specific code

O00.9 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O00.9

O00.9 is the ICD-10-CM diagnosis code for ectopic pregnancy, unspecified. It belongs to category O00 (ectopic pregnancy), block O00-O08 (pregnancy with abortive outcome) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within O00, choose O00.9 (unspecified) only when documentation doesn't support a more specific option: abdominal pregnancy (O00.0), tubal pregnancy (O00.1), ovarian pregnancy (O00.2), cesarean scar ectopic pregnancy (O00.3), cervical ectopic pregnancy (O00.4), cornual ectopic pregnancy (O00.5) and other ectopic pregnancy (O00.8).

To report this condition, pick the subcode that matches the documentation: O00.90 (pregnancy) and O00.91 (pregnancy).

Use an additional code from category O08 to identify any associated complication.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (expanded into subcodes).

Specific codes under O00.9

Notes that apply from higher levels

Instructions written at a parent level also apply to O00.9.

› From O00 Ectopic pregnancy
Includes
  • ruptured ectopic pregnancy
Use additional code
  • code from category O08 to identify any associated complication

Broader instructions also apply from O00-O08 Pregnancy with abortive outcome and Chapter 15: Pregnancy, childbirth and the puerperium.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • FY2017 (effective 10/1/2016): Expanded — no longer billable

Common questions about O00.9

Is O00.9 billable?

No. O00.9 is a header code. Report one of its more specific subcodes instead.