ICD-10-CM 2027
ICD-10 code for Inevitable abortion
Incomplete spontaneous abortion without complication
From the official ICD-10-CM alphabetic index entry “Abortion (complete) (spontaneous) › inevitable”. Page updated September 29, 2026.
About coding Inevitable abortion
The ICD-10-CM code for Inevitable abortion is O03.4 (Incomplete spontaneous abortion without complication).
Within O03, choose O03.4 (Incomplete spontaneous abortion without complication) only when documentation doesn't support a more specific option: genital tract and pelvic infection following incomplete spontaneous abortion (O03.0), delayed or excessive hemorrhage following incomplete spontaneous abortion (O03.1), embolism following incomplete spontaneous abortion (O03.2), other and unspecified complications following incomplete spontaneous abortion (O03.3), genital tract and pelvic infection following complete or unspecified spontaneous abortion (O03.5), delayed or excessive hemorrhage following complete or unspecified spontaneous abortion (O03.6), embolism following complete or unspecified spontaneous abortion (O03.7), other and unspecified complications following complete or unspecified spontaneous abortion (O03.8) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 770 (Abortion with D&C, Aspiration Curettage or Hysterotomy, relative weight 1.0992) and DRG 779 (Abortion without D&C, relative weight 1.0203), in MDC 14 (Pregnancy, Childbirth and the Puerperium), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Inevitable abortion ICD-10 codes
What is the ICD-10 code for Inevitable abortion?
- O03.4 — Incomplete spontaneous abortion without complication.
Is O03.4 billable?
- Yes. O03.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can O03.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict O03.4 as a principal diagnosis.
Is O03.4 a CC or MCC?
- No. O03.4 is neither a CC nor an MCC under MS-DRG v44.0.