2027 ICD-10-CM Diagnosis Code O20.9Hemorrhage in early pregnancy, unspecified
ICD-10-CM Codes›O00-O9A›O20-O29›O20
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 817 through 819, 831 through 833. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 247 closely related codes. 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
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for O20.9.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bleeding from female genital tract during pregnancy
- Vaginal bleeding complicating early pregnancy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to O20.9: its own notes plus those printed at O20, block O20-O29, and Chapter 15. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- hemorrhage before completion of 20 weeks gestation
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 O20.9, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Pregnancy (single) (uterine) See Also: Delivery and Puerperal; Z33.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Code HistoryHistory
Questions About O20.9Overview
What is the ICD-10 code for hemorrhage in early pregnancy, unspecified?
The ICD-10-CM code for hemorrhage in early pregnancy, unspecified is O20.9 (sometimes written as O209). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 833, 832, 831, 819, 818, 817, with relative weights from 0.5000 to 1.7586 depending on complications. Higher weights mean higher Medicare reimbursement.
Is O20.9 a CC or MCC?
CMS lists O20.9 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 247 closely related codes in its exclusion list.
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.
