ICD-10-CM 2027
ICD-10 code for prolonged pregnancy
From the official ICD-10-CM alphabetic index entry “Pregnancy (single) (uterine) › prolonged (more than 42 weeks gestation)”. Page updated September 29, 2026.
About coding prolonged pregnancy
The ICD-10-CM code for prolonged pregnancy is O48.1 (Prolonged pregnancy).
Within O48 (late pregnancy), O48.1 is specifically for prolonged pregnancy. Related codes cover Post-term pregnancy (O48.0).
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 817 (Other Antepartum Diagnoses with O.R. Procedures with MCC, relative weight 2.0534), DRG 818 (Other Antepartum Diagnoses with O.R. Procedures with CC, relative weight 1.2942), DRG 819 (Other Antepartum Diagnoses with O.R. Procedures without CC/MCC, relative weight 0.7739), DRG 831 (Other Antepartum Diagnoses without O.R. Procedures with MCC, relative weight 1.1558), DRG 832 (Other Antepartum Diagnoses without O.R. Procedures with CC, relative weight 0.7585) and DRG 833 (Other Antepartum Diagnoses without O.R. Procedures without CC/MCC, relative weight 0.5002), 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 prolonged pregnancy ICD-10 codes
What is the ICD-10 code for prolonged pregnancy?
- O48.1 — Prolonged pregnancy.
Is O48.1 billable?
- Yes. O48.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can O48.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict O48.1 as a principal diagnosis.
Is O48.1 a CC or MCC?
- No. O48.1 is neither a CC nor an MCC under MS-DRG v44.0.