2027 ICD-10-CM Diagnosis Code O44.20Partial placenta previa NOS or without hemorrhage, unspecified trimester

ICD-10-CM Codes›O00-O9A›O30-O48›O44

ICD-10-CM O44.20
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

O44.20 is a billable ICD-10-CM diagnosis code for partial placenta previa NOS or without hemorrhage, unspecified trimester. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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 placenta previa marginalis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care related to disorders of the placenta and placental implantation.

Code Identity

ICD-10-CM Code
O44.20
Billable Status
Yes — Valid for Submission
Code Describes
Partial placenta previa NOS or without hemorrhage, unspecified trimester
Short Description
Partial placenta previa NOS or without hemor, unsp trimester
Parent Code
O44.2
Partial placenta previa without 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 CodeO44.20Partial placenta previa NOS or without hemorrhage, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O44.20.

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.

  • Placenta previa marginalis
  • Placenta previa partialis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O44.20: its own notes plus those printed at Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name O44.20, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming O44.20: they are not reported together with it, unless the two conditions are unrelated.

  • O46 Antepartum hemorrhage, not elsewhere classified
    placenta previa (O44.-) names O44.-, which includes this code
  • O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified
    placenta previa (O44.-) names O44.-, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming O44.20: its condition is not part of those codes, and both may be reported when the patient has both.

  • O43 Placental disorders
    placenta previa (O44.-) names O44.-, which includes this code

Clinical ClassificationClinical

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

CCSR PRG018
Maternal care related to disorders of the placenta and placental implantation
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Placenta Previa

    abnormal placentation in which the placenta implants in the lower segment of the uterus (the zone of dilation) and may cover part or all of the opening of the cervix. it is often associated with serious antepartum bleeding and premature labor.

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 O44.20 to ICD-9-CMHistory

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

ICD-9-CM
641.00 Placenta previa-unspec
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement O44.20 replaces the following previously assigned code(s):

  • O44.00 - Complete placenta previa NOS or without hemor, unsp tri
  • O44.00 - Placenta previa specified as w/o hemorrhage, unsp trimester
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O44.20Overview

Is O44.20 (Partial placenta previa without hemorrhage) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report partial placenta previa NOS or without hemorrhage, unspecified trimester on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does O44.20 group to?

When partial placenta previa NOS or without hemorrhage, unspecified trimester is the principal diagnosis on an inpatient stay, it groups to MS-DRG 833, 832, 831, 819, 818, 817, with relative weights from 0.5000 to 1.7586 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can O44.20 be reported for?

The Medicare Code Editor checks partial placenta previa NOS or without hemorrhage, unspecified 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 O44.20?

Under the General Equivalence Mappings, partial placenta previa NOS or without hemorrhage, unspecified trimester converts to ICD-9-CM 641.00 (placenta previa-unspec). The mapping is approximate, so confirm the match fits the documentation.