ICD-10 O48.0
Billable / SpecificPost-term pregnancy
About ICD-10-CM O48.0
ICD-10-CM code O48.0 represents Post-term pregnancy. This is a billable/specific code in the Pregnancy, Childbirth, and Puerperium chapter (block O48). The 2026 edition of ICD-10-CM O48.0 became effective on October 1, 2025.
Coding Tips for O48.0
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Most O codes require a 7th character indicating trimester (1 = first, 2 = second, 3 = third). Some require fetus identification character. Code O09 (supervision of high-risk pregnancy) is required as a secondary code when applicable.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under O48.0. Per CMS ICD-10-CM Tabular 2026.
- Pregnancy over 40 completed weeks to 42 completed weeks gestation
Medicare LCD Coverage for O48.0
Local Coverage Determinations (LCDs) from CMS MACs that list O48.0 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O48.0.
1 Aetna
1 Cigna
CPT Codes Commonly Billed with O48.0
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 59400 Vaginal delivery global — uncomplicated delivery, C-section, single liveborn, post-term, preterm labor, premature rupture membranes, small for gestational age, supervision high-risk pregnancy OB/GYN
Convert O48.0 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| O48.0 | 64511 | 10000 |
| O48.0 | 64513 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To O48.0
Other codes in section O30-O48 (Maternal care related to the fetus and amniotic cavity and possible delivery problems).
ICD-10 O48.0, Billing FAQ
Is ICD-10 code O48.0 billable? +
Yes, O48.0 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to O48.0? +
ICD-10 O48.0 includes: Pregnancy over 40 completed weeks to 42 completed weeks gestation.
What CPT codes are commonly billed with O48.0? +
Procedures frequently paired with O48.0 include: 59400.
What ICD-9 codes does O48.0 map to? +
Per CMS GEMs, O48.0 maps to ICD-9 codes: 64511, 64513. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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