2026 ICD-10-CM Diagnosis Code O44.33Partial placenta previa with hemorrhage, third trimester

ICD-10-CM Codes›O00-O9A›O30-O48›O44

ICD-10-CM O44.33
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O44.33 is a billable ICD-10-CM diagnosis code for partial placenta previa with hemorrhage, third trimester. 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). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hemorrhage after first trimester and Maternal care related to disorders of the placenta and placental implantation.

Code Identity

ICD-10-CM Code
O44.33
Billable Status
Yes — Valid for Submission
Code Describes
Partial placenta previa with hemorrhage, third trimester
Short Description
Partial placenta previa with hemorrhage, third trimester
Same as the full description in the CMS dataset.
Parent Code
O44.3
Partial placenta previa with hemorrhage

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO44Placenta previa
This CodeO44.33Partial placenta previa with hemorrhage, third trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O44.33.

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).

Clinical ClassificationClinical

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

CCSR PRG010
Hemorrhage after first trimester
Default principal diagnosis: inpatient No · outpatient No
CCSR PRG018
Maternal care related to disorders of the placenta and placental implantation
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

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

Convert O44.33 to ICD-9-CMHistory

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

ICD-9-CM
641.11 Placenta prev hem-deliv
Approximate The match is approximate rather than exact.
ICD-9-CM
641.13 Placen prev hem-antepart
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement O44.33 replaces the following previously assigned code(s):

  • O44.13 - Complete placenta previa with hemorrhage, third trimester
  • O44.13 - Placenta previa with hemorrhage, third trimester
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O44.33Overview

Is O44.33 (Partial placenta previa with hemorrhage) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report partial placenta previa with hemorrhage, third trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O44.33 group to?

When partial placenta previa with hemorrhage, third trimester 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 O44.33 be reported for?

The Medicare Code Editor checks partial placenta previa with hemorrhage, third trimester 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 O44.33?

Under the General Equivalence Mappings, partial placenta previa with hemorrhage, third trimester converts to ICD-9-CM 641.11 (placenta prev hem-deliv) and 641.13 (placen prev hem-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.