Hemorrhage in early pregnancy (O20) ICD-10-CM
The O20 code range covers hemorrhage in early pregnancy with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- hemorrhage before completion of 20 weeks gestation
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the O20 Range 4 codes · 3 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the O20 range.
Abortion, Threatened
UTERINE BLEEDING from a GESTATION of less than 20 weeks without any CERVICAL DILATATION. It is characterized by vaginal bleeding, lower back discomfort, or midline pelvic cramping and a risk factor for MISCARRIAGE.
About the O20 Code Range
Bleeding in early pregnancy appears here under maternal disorders related to pregnancy.
The subdivisions separate O20.0 for threatened abortion, O20.8 for other bleeding, and O20.9 when the bleeding is unspecified. Threatened miscarriage is an everyday term for threatened abortion.
Questions About This Page
How many billable codes are in the O20 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the O20 range classify?
The range classifies hemorrhage in early pregnancy. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
