2026 ICD-10-CM Diagnosis Code O20.9Hemorrhage in early pregnancy, unspecified

ICD-10-CM Codes›O00-O9A›O20-O29›O20

ICD-10-CM O20.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O20.9 is a billable ICD-10-CM diagnosis code for hemorrhage in early pregnancy, unspecified. 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 bleeding from female genital tract during pregnancy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Early, first or unspecified trimester hemorrhage.

This medical diagnosis code is frequently used in OB/GYN medical specialties to designate conditions such maternal disorders related to pregnancy.

Code Identity

ICD-10-CM Code
O20.9
Billable Status
Yes — Valid for Submission
Code Describes
Hemorrhage in early pregnancy, unspecified
Short Description
Hemorrhage in early pregnancy, unspecified
Same as the full description in the CMS dataset.
Parent Code
O20
Hemorrhage in early pregnancy

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO20-O29Other maternal disorders predominantly related to pregnancy
CategoryO20Hemorrhage in early pregnancy
This CodeO20.9Hemorrhage in early pregnancy, unspecified

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O20.9.

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.

  • Bleeding from female genital tract during pregnancy
  • Vaginal bleeding complicating early 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.

    • Hemorrhage, hemorrhagic(concealed)
      • antepartum (with)
        • before 20 weeks gestation
    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • hemorrhage
          • before 20 completed weeks gestation
    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • hemorrhage
          • early

Clinical ClassificationClinical

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

CCSR PRG009
Early, first or unspecified trimester hemorrhage
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Health Problems in Pregnancy

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

The full article covers:

  • What are health problems in pregnancy?
  • What raises my risk for health problems during pregnancy?
  • Can chronic health conditions cause problems in pregnancy?
  • Can health problems in pregnancy be prevented?

Read the full article at MedlinePlus

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

Convert O20.9 to ICD-9-CMHistory

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

ICD-9-CM
640.93 Hem early preg-antepart
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 O20.9Overview

Is O20.9 (Hemorrhage in early pregnancy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hemorrhage in early pregnancy, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O20.9 group to?

When hemorrhage in early pregnancy, unspecified 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 O20.9 be reported for?

The Medicare Code Editor checks hemorrhage in early pregnancy, unspecified 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 O20.9?

Under the General Equivalence Mappings, hemorrhage in early pregnancy, unspecified converts to ICD-9-CM 640.93 (hem early preg-antepart). 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.