O48.0 Post-term pregnancy

Billable ICD-10-CM code, FY2026.

Applicable to

• Pregnancy over 40 completed weeks to 42 completed weeks gestation

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 645.11 Post term pregnancy, delivered, with or without mention of antepartum condition (approximate)
• 645.13 Post term pregnancy, antepartum condition or complication (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Diagnosis Index entries for O48.0

• Post-dates (40-42 weeks) (pregnancy) (mother)
• Post-term (40-42 weeks) (pregnancy) (mother)
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › postmaturity (post-term) (40 to 42 weeks)
• Pregnancy (single) (uterine) › postmature (40 to 42 weeks)
• Pregnancy (single) (uterine) › post-term (40 to 42 weeks)

Nearby codes

• O48 Late pregnancy
• O48.0 Post-term pregnancy (this code)
• O48.1 Prolonged pregnancy