O48.1 Prolonged pregnancy

The ICD-10-CM code for Prolonged pregnancy is O48.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O30-O48: Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)

Category O48

3 codes (2 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O48.1:

• Post-term (40-42 weeks) (pregnancy) (mother) › more than 42 weeks gestation (mother)
• Pregnancy (single) (uterine) › prolonged (more than 42 weeks gestation)
• Prolonged, prolongation (of) › pregnancy (more than 42 weeks gestation)
• Post-dates (40-42 weeks) (pregnancy) (mother) › more than 42 weeks gestation
• Postmaturity, postmature (over 42 weeks) › maternal (over 42 weeks gestation)
• Prolonged, prolongation (of) › gestation (over 42 completed weeks) › mother
• Pregnancy (single) (uterine) › postmature (40 to 42 weeks) › more than 42 weeks gestation
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › postmaturity (post-term) (40 to 42 weeks) › more than 42 completed weeks gestation (prolonged)

Inclusion Terms

• Pregnancy which has advanced beyond 42 completed weeks gestation

U.S. Hospital Utilization

• An estimated 2,250 U.S. inpatient stays in 2023 included O48.1 among the documented diagnoses.
• 1,505 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)