CPT 59400 bundles an entire pregnancy into one code, which works cleanly for a single uncomplicated pregnancy managed by one provider, and breaks down the moment either of those conditions isn't true.
What's actually inside the global package
CPT 59400 covers routine antepartum care, vaginal delivery, and postpartum care through roughly six weeks after birth, for an uncomplicated pregnancy managed start to finish by a single provider or group. Routine prenatal visits, labor management, and the standard postpartum follow-up are all folded into the one global fee.
What's billed separately, every time
Ultrasounds, glucose tolerance testing and other routine labs, and any diagnostic workup outside standard prenatal monitoring are never part of the global fee. They're billed on their own regardless of how routine or uneventful the pregnancy otherwise is, folding them into the global code just leaves that revenue unbilled.
When the pregnancy doesn't stay with one provider
The global code assumes one provider or group carried the pregnancy from the first prenatal visit through the postpartum visit. When care is split, a patient transfers practices mid-pregnancy, or delivers with a different group than the one that provided prenatal care, the global code is the wrong choice for either practice involved. Antepartum-only care uses CPT 59425 (4-6 visits) or 59426 (7 or more visits), and postpartum-only care uses CPT 59430. Billing the full global code when a practice only saw the patient for part of the pregnancy is one of the more common OB-GYN denial patterns, because the payer can see claims from more than one provider covering the same pregnancy.
Well-woman visits complicate same-day billing too
A well-woman visit and a separately identifiable problem visit on the same day follow their own rule, modifier 25 on the problem-focused E/M code, distinct documentation for each. We cover that in more detail on our OB-GYN billing page.
What to check before your next maternity claim
1. Did this practice manage the pregnancy from the first prenatal visit through the postpartum visit, or did care transfer at some point?
2. Are ultrasounds and labs billed separately from the global code, not folded into it?
3. If care was split between providers, are antepartum-only, delivery-only, or postpartum-only codes used instead of the global code?
Sources
American College of Obstetricians and Gynecologists (ACOG), acog.org.
Centers for Medicare & Medicaid Services, Physician Fee Schedule, cms.gov.
AAPC coding resources, aapc.com.
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