2027 ICD-10-CM Diagnosis Code O45.90Premature separation of placenta, unspecified, unspecified trimester
ICD-10-CM Codes›O00-O9A›O30-O48›O45
- Billable — Valid for Submission
- Not Chronic
O45.90 is a billable ICD-10-CM diagnosis code for premature separation of placenta, unspecified, 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 antepartum hemorrhage, abruptio placentae and placenta previa. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Early, first or unspecified trimester hemorrhage; and Maternal care related to disorders of the placenta and placental implantation.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for O45.90.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Antepartum hemorrhage, abruptio placentae and placenta previa
- Bleeding from female genital tract during pregnancy
- Detached products of conception
- Fetal disorder due to maternal antepartum hemorrhage
- Fetal disorder due to maternal hemorrhage during pregnancy
- Fetal disorder due to placental abruption
- Fetal disorder due to placental hemorrhage
- Placenta previa with hemorrhage
- Placental abruption
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to O45.90: 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.
- 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.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- 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.
- 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 O45.90, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming O45.90: they are not reported together with it, unless the two conditions are unrelated.
- O46 Antepartum hemorrhage, not elsewhere classifiedpremature separation of placenta [abruptio placentae] (O45.-) names O45.-, which includes this code
- O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classifiedpremature separation of placenta [abruptio placentae] (O45.-) names O45.-, which includes this code
- O99.1 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumhemorrhage with coagulation defects (O45.-, O46.0-, O67.0, O72.3) names O45.-, which includes this code
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Placental Abruption
placental separation from the uterus with bleeding (concealed or vaginal) before fetal birth, with or without maternal/fetal compromise. (revitalize)
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 O45.90 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About O45.90Overview
What is the ICD-10 code for premature separation of placenta, unspecified, unspecified trimester?
The ICD-10-CM code for premature separation of placenta, unspecified, unspecified trimester is O45.90 (sometimes written as O4590). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is O45.90 (Premature separation of placenta, unspecified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report premature separation of placenta, unspecified, unspecified trimester on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does O45.90 group to?
When premature separation of placenta, unspecified, 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 O45.90 be reported for?
The Medicare Code Editor checks premature separation of placenta, unspecified, 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 O45.90?
Under the General Equivalence Mappings, premature separation of placenta, unspecified, unspecified trimester converts to ICD-9-CM 641.20 (prem separ placen-unspec). The mapping is approximate, so confirm the match fits the documentation.
