OB/GYN Billing Services: Why Obstetrics and Gynecology Practices Lose Revenue on Every Delivery and Procedure

By Medtransic Team | March 8, 2026 | 10 min read | Updated: July 3, 2026

Quick Summary: OB/GYN billing is dominated by one unusual structure: the global obstetric package, where nine months of care becomes a single code billed after delivery. Everything that doesn't fit that package — transfers of care, complications, twin deliveries, gyn procedures, contraceptive devices — is where the revenue decisions actually happen. Here are the real rules.

Obstetric billing concentrates risk in a way no other specialty does: months of care, dozens of encounters, one claim. The global OB package means your practice provides antepartum visits, delivery, and postpartum care — and then bills a single code whose payment has to carry all of it. When that structure fits, billing looks simple. But pregnancies routinely refuse to fit — patients transfer in at 28 weeks, develop complications that generate visits far beyond the package norm, deliver twins, or move away at 36 weeks — and each deviation changes what should be billed, by how much, and when.

A billing operation that defaults everything to the global code gets paid — once — and silently absorbs every deviation. This article lays out how the package actually works, when to break it apart, and where the gynecology side leaks separately. It's the working rulebook behind Medtransic's OB/GYN billing program.

• Global Vaginal Delivery Package - Antepartum + delivery + postpartum, one claim
• 7+ visits Antepartum Only - The transfer-of-care workhorse
• Postpartum Care Only - When you provided just the aftercare
• IUD Insertion + Device - Device supply billed as its own second line

The Global OB Package: One Code for Nine Months

The global codes are the spine of OB revenue: one code covers routine antepartum care, vaginal delivery, and postpartum care; a separate code covers the cesarean version; others cover VBAC and attempted-VBAC-that-became-cesarean. Each assumes a routine course — commonly understood as roughly thirteen antepartum visits, the delivery with its immediate follow-up, and the postpartum visit sequence. The claim goes out after delivery, which creates OB's distinctive cash-flow reality: your practice finances months of care before the payer sees a bill. That makes two operational disciplines non-negotiable: verifying coverage early and re-verifying it late (patients change plans mid-pregnancy constantly — the payer at the first visit is frequently not the payer at delivery), and tracking every antepartum encounter, because the visit count is exactly what you'll need if the package breaks.

When the Package Breaks: Transfers, Complications, Twins

The global package assumes one practice provided the whole course. Real pregnancies break that assumption in predictable ways, and coding provides the pieces for every fracture pattern:

Notice the asymmetry: some failure modes overbill (compliance exposure) and some underbill (donated care), and a billing operation without OB-specific logic commits both simultaneously on different patients. The raw material for getting every row right is the same: a per-patient antepartum visit count, maintained in real time, and payer-specific package policies on file — because payers genuinely differ on twin billing and on what a "transfer" requires documentation-wise.

What's Billable Outside the Package

The most expensive misunderstanding in OB billing is treating the global package as covering everything that happens during a pregnancy. It covers routine care. A pregnancy complicated by gestational diabetes, hypertension, or preterm labor scares generates encounters well beyond the routine schedule — and visits addressing complications are separately billable office visits carrying the complication's diagnosis, distinct from routine prenatal visits. The same is true for problems unrelated to the pregnancy entirely (the UTI, the sinus infection). Practices that swallow every encounter into the global are giving away precisely the visits that made the pregnancy hard.

Ultrasounds follow the same outside-the-package logic with their own code family — and their own payer frequency limits for routine versus medically indicated studies, which is where high-risk practices need their diagnosis coding aligned with what was ordered and why.

The Gyn Side: Procedures, Devices, and Preventive Visits

Gynecology revenue runs on different rails. Three patterns account for most of the leakage. First, contraceptive devices: LARC billing is always two lines — the insertion procedure (one code for an IUD, a different one for a contraceptive implant) plus the device itself under its specific supply code. The device line is the expensive one, and it's the one that goes missing when a superbill template or a rushed biller treats insertion as the whole event. A practice that stocked the device paid for it; dropping the supply line means eating that cost, patient after patient.

Second, same-day preventive and problem care. The annual well-woman visit that surfaces a real problem — abnormal bleeding, a breast complaint — legitimately supports both the preventive service and a separately identifiable problem visit, flagged as distinct from the preventive service, when the documentation keeps them distinct. Practices without a same-day policy do the extra work free. Third, office procedures — colposcopy, LEEP, endometrial biopsy, hysteroscopy — each carry their own bundling relationships and, for the surgical ones, global periods that pull routine follow-up inside the payment. The pattern to watch is biopsy-plus-procedure encounters, where what's separately billable depends on the specific code pair.

What to Ask an OB/GYN Billing Partner

OB/GYN billing competence shows up in specific answers:

1. How do you track antepartum visit counts per patient — and what happens to that count when a patient transfers in or out?
2. A patient transfers out at 34 weeks after nine visits with us. What goes on the claim? (The answer itemizes the antepartum visits we actually provided. Silence or "just the global code" ends the interview.)
3. How do you bill twin deliveries for our top three payers — specifically?
4. What's your process for identifying complication visits that should bill outside the global — and how often do you query ambiguous prenatal notes?
5. Show me an IUD insertion claim from a client (redacted): is the device supply line on it?
6. How do you re-verify coverage late in pregnancy, before the delivery claim is built on stale insurance information?

The global package makes OB revenue look simpler than it is — one code, one claim, months of exposure. The practices that collect what they earn are the ones whose billing operation knows exactly when the package applies and exactly how to take it apart when it doesn't. That's the daily work of Medtransic's OB/GYN billing program, backed by eligibility verification and denial management. Request a billing review and we'll walk your recent OB episodes against every scenario in this article.

Sources & References

• ACOG — Coding resources for obstetrics and gynecology
• AMA — maternity care and delivery code definitions
• CMS — National Correct Coding Initiative — bundling edits for gyn procedures