2026 ICD-10-CM Diagnosis Code O02.0Blighted ovum and nonhydatidiform mole

ICD-10-CM Codes›O00-O9A›O00-O08›O02

ICD-10-CM O02.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O02.0 is a billable ICD-10-CM diagnosis code for blighted ovum and nonhydatidiform mole. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 817 through 819, 831 through 833. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). Coders also document this condition as blighted ovum. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Molar pregnancy and other abnormal products of conception.

Code Identity

ICD-10-CM Code
O02.0
Billable Status
Yes — Valid for Submission
Code Describes
Blighted ovum and nonhydatidiform mole
Short Description
Blighted ovum and nonhydatidiform mole
Same as the full description in the CMS dataset.
Parent Code
O02
Other abnormal products of conception

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO00-O08Pregnancy with abortive outcome
CategoryO02Other abnormal products of conception
This CodeO02.0Blighted ovum and nonhydatidiform mole

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O02.0.

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.

  • Blighted ovum
  • Carneous mole

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Carneous mole
  • Fleshy mole
  • Intrauterine mole NOS
  • Molar pregnancy NEC
  • Pathological ovum

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.

    • Blighted ovum
    • Blood
      • mole
    • Breus' mole
    • Carneous mole
    • Dead
      • ovum, retained
    • Fleshy mole
    • Molar pregnancy
    • Mole(pigmented)
      • blood
    • Mole(pigmented)
      • Breus'
    • Mole(pigmented)
      • carneous
    • Mole(pigmented)
      • fleshy
    • Mole(pigmented)
      • intrauterine
    • Mole(pigmented)
      • nonhydatidiform
    • Mole(pigmented)
      • pregnancy NEC
    • Pathologic, pathological
      • ovum
    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • retained, retention
          • dead ovum
    • Pregnancy(single) (uterine)
      • molar NEC
    • Retention
      • dead
        • ovum

Clinical ClassificationClinical

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

CCSR PRG006
Molar pregnancy and other abnormal products of conception
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Miscarriage

A miscarriage is an unexpected loss of pregnancy before the 20th week. Most miscarriages happen very early in the pregnancy, often before a woman even knows she is pregnant.

The full article covers:

  • What is a miscarriage?
  • What causes a miscarriage?
  • What are the signs of a miscarriage?
  • How is a miscarriage diagnosed?
  • What is the treatment for a miscarriage?
  • Can a miscarriage be prevented?

Read the full article at MedlinePlus

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

Convert O02.0 to ICD-9-CMHistory

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

ICD-9-CM
631.8 Oth abn prod conception
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 O02.0Overview

Is O02.0 (Other abnormal products of conception) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report blighted ovum and nonhydatidiform mole on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O02.0 group to?

When blighted ovum and nonhydatidiform mole is the principal diagnosis on an inpatient stay, it groups to MS-DRG 817, 818, 819, 831, 832, 833, with relative weights from 0.5229 to 1.6880 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can O02.0 be reported for?

The Medicare Code Editor checks blighted ovum and nonhydatidiform mole 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 O02.0?

Under the General Equivalence Mappings, blighted ovum and nonhydatidiform mole converts to ICD-9-CM 631.8 (oth abn prod conception). 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.