2026 ICD-10-CM Diagnosis Code O08.5Metabolic disorders following an ectopic and molar pregnancy

ICD-10-CM Codes›O00-O9A›O00-O08›O08

ICD-10-CM O08.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O08.5 is a billable ICD-10-CM diagnosis code for metabolic disorders 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). Coders also document this condition as electrolyte imbalance following ectopic pregnancy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complications following ectopic and/or molar pregnancy.

Code Identity

ICD-10-CM Code
O08.5
Billable Status
Yes — Valid for Submission
Code Describes
Metabolic disorders following an ectopic and molar pregnancy
Short Description
Metabolic disorders following an ectopic and molar pregnancy
Same as the full description in the CMS dataset.
Parent Code
O08
Complications following ectopic and molar pregnancy

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO00-O08Pregnancy with abortive outcome
CategoryO08Complications following ectopic and molar pregnancy
This CodeO08.5Metabolic disorders following an ectopic and molar pregnancy

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O08.5.

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).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Electrolyte imbalance following ectopic pregnancy
  • Electrolyte imbalance following molar pregnancy
  • Metabolic disorder following ectopic pregnancy
  • Metabolic disorder following molar pregnancy

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)
      • ectopic pregnancy
        • metabolic disorder
    • Complication(s) (from) (of)
      • molar pregnancy NOS
        • metabolic disorder
    • Disorder(of)
      • electrolyte (balance) NEC
        • with
          • ectopic pregnancy
    • Disorder(of)
      • electrolyte (balance) NEC
        • with
          • molar pregnancy
    • Disturbance(s)
      • metabolism
        • with
          • ectopic pregnancy
    • Disturbance(s)
      • metabolism
        • with
          • molar pregnancy
    • Electrolyte imbalance
      • with
        • ectopic pregnancy
    • Electrolyte imbalance
      • with
        • molar pregnancy
    • Imbalance
      • electrolyte
        • with
          • molar pregnancy
    • Imbalance
      • electrolyte
        • following ectopic or molar pregnancy
    • Pregnancy(single) (uterine)
      • ectopic (ruptured)
        • complicated (by)
          • electrolyte imbalance
    • Pregnancy(single) (uterine)
      • ectopic (ruptured)
        • complicated (by)
          • metabolic disorder
    • Pregnancy(single) (uterine)
      • molar NEC
        • complicated (by)
          • electrolyte imbalance
    • Pregnancy(single) (uterine)
      • molar NEC
        • complicated (by)
          • metabolic disorder

Clinical ClassificationClinical

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

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 O08.5 to ICD-9-CMHistory

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

ICD-9-CM
639.4 Postabort metabolic dis
Exact Match The mapping is direct, with no qualifiers.

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 O08.5Overview

Is O08.5 (Complications following ectopic and molar pregnancy) a billable code?

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

Who can O08.5 be reported for?

The Medicare Code Editor checks metabolic disorders 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 O08.5?

Under the General Equivalence Mappings, metabolic disorders following an ectopic and molar pregnancy converts to ICD-9-CM 639.4 (postabort metabolic dis). The mapping is a direct match.

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.