2026 ICD-10-CM Diagnosis Code O08.81Cardiac arrest following an ectopic and molar pregnancy

ICD-10-CM Codes›O00-O9A›O00-O08›O08

ICD-10-CM O08.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O08.81 is a billable ICD-10-CM diagnosis code for cardiac arrest following an ectopic and molar pregnancy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac arrest and ventricular fibrillation and Complications following ectopic and/or molar pregnancy.

Code Identity

ICD-10-CM Code
O08.81
Billable Status
Yes — Valid for Submission
Code Describes
Cardiac arrest following an ectopic and molar pregnancy
Short Description
Cardiac arrest following an ectopic and molar pregnancy
Same as the full description in the CMS dataset.
Parent Code
O08.8
Other complications following an ectopic and molar pregnancy

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO00-O08Pregnancy with abortive outcome
CategoryO08Complications following ectopic and molar pregnancy
This CodeO08.81Cardiac arrest following an ectopic and molar pregnancy

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O08.81.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Complication(s) (from) (of)
      • following
        • ectopic or molar pregnancy
          • cardiac arrest
    • Pregnancy(single) (uterine)
      • ectopic (ruptured)
        • complicated (by)
          • cardiac arrest
    • Pregnancy(single) (uterine)
      • molar NEC
        • complicated (by)
          • cardiac arrest

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR018
Cardiac arrest and ventricular fibrillation
Default principal diagnosis: inpatient No · outpatient No
CCSR PRG007
Complications following ectopic and/or molar pregnancy
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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.

The full article covers:

  • What is an ectopic pregnancy?
  • What increases my risk of an ectopic pregnancy?
  • What are the symptoms of an ectopic pregnancy?
  • How is an ectopic pregnancy diagnosed?
  • What is the treatment for an ectopic pregnancy?

Read the full article at MedlinePlus

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

Convert O08.81 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
639.8 Postabortion compl NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O08.81Overview

Is O08.81 (Other complications following an ectopic and molar pregnancy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cardiac arrest following an ectopic and molar pregnancy on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Who can O08.81 be reported for?

The Medicare Code Editor checks cardiac arrest following an ectopic and molar pregnancy against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O08.81?

Under the General Equivalence Mappings, cardiac arrest following an ectopic and molar pregnancy converts to ICD-9-CM 639.8 (postabortion compl NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.