OB/GYN Billing · 2027 Changes

On January 1, 2027, the global OB package goes away. One claim per pregnancy becomes a string of separate claims, each with its own documentation and its own chance to be denied. Here’s what the 2027 OB coding changes actually replace, how to bill the pregnancies already underway, and what to fix before the first January delivery.

What Is Changing in 2027 OB Coding?

The AMA’s CPT 2027 maternity update deletes 17 codes, adds 12 and revises 6. The biggest change is the end of the global package: the bundled codes that covered antepartum care, delivery and postpartum care in a single claim.

In their place, maternity care is reported in four separate phases. Gynecology codes aren’t affected.

Old Codes and What Replaces Them

The delivery-only and delivery-plus-postpartum variants (59409, 59410, 59514, 59515, 59612, 59614, 59620, 59622) are deleted too, along with 59430, 59050 and 59525. Cesarean hysterectomy moves to 59504, and uterine tamponade for postpartum hemorrhage gets its own code, 59623.

The New Labor Management Codes

This is the part most practices have never billed before. Labor management is reported once per calendar date, and the code depends on whether it’s the first day or a later one, and whether labor is straightforward or complex.

Length of labor doesn’t decide complexity on its own, unless prolonged labor is actually diagnosed. Straightforward means everything is routine: a singleton vertex presentation, routine maternal and fetal monitoring, normal progression or a routine induction, stable maternal conditions and no prior cesarean. Any deviation, and it’s complex. That’s a documentation question, not a coding one, so the note has to say why.

How to Bill Pregnancies That Cross Into 2027

Right now, every practice has patients who started prenatal care in 2026 and will deliver in 2027. No single code covers them anymore. The general approach is to split the pregnancy by calendar year and use the rules in effect on each date of service.

Payers are not all doing this the same way. Some Medicaid programs and ACOG guidance tie the method to the date of the first prenatal visit, with September 1, 2026 as a common cutoff for switching to per-visit E/M. Some payers also want the TH modifier on prenatal E/M visits and some don’t. Get each major payer’s transition policy in writing before you bill a single 2027 delivery.

What This Does to OB Revenue and Cash Flow

The AMA designed the new code set to be budget neutral overall. That doesn’t mean your practice comes out even. Three things change for sure.

• Timing. Payment arrives visit by visit instead of in one large check after delivery. Cash flow gets smoother, but only if every claim goes out clean and on time.
• Volume. One pregnancy can turn into 15 or more separate claims. Every one of them is a chance for a denial, a missed charge or a timely filing problem.
• Documentation. Each prenatal visit now has to support its own E/M level, and every labor day has to support straightforward or complex. Thin notes that were fine under a bundled code turn into underpaid claims.

High-risk practices may actually capture more, since complexity now gets paid where it used to be absorbed into one flat fee. Routine practices are more likely to see similar revenue with more work behind it. The practices that lose money will be the ones that miss charges in the handoff between phases.

Want help getting your OB/GYN practice ready for 2027? One multi-provider OB/GYN group we work with lifted monthly collections 25%, with the first 20% gain inside 60 days. See how our physician-led team handles OB/GYN billing, or get a free billing metric audit.

What Changes at the Front Desk and in the Chart

This isn’t only a coding change. Under the global code, you checked eligibility once per pregnancy. Once every prenatal visit becomes its own claim, you need to check eligibility before each visit. That’s because coverage changes mid-pregnancy, and plans often change on January 1. A coverage gap now lands on a specific claim instead of disappearing into one bundled payment.

Charting changes too. In the past, the global fee paid the same no matter how lightly a routine visit was documented. Now each prenatal and postpartum visit has to stand on its own as a billable service. In short, every visit you don’t document is a visit you can’t bill, and every extra claim is one more chance for a denial.

Your Checklist Before January 1, 2027

1. List every patient due on or after January 1, 2027, by payer.
2. Get each major payer’s transition policy in writing, including the TH modifier.
3. Build the 2026 close-out list: which patients need 59425 or 59426, and on which date.
4. Confirm when your EHR, practice management system and clearinghouse load the 2027 codes, and test a claim before January.
5. Update prenatal, labor and postpartum templates so each note supports its own code.
6. Train physicians on the straightforward vs. complex labor criteria and the same-day rules.
7. Check your payer contracts and fee schedules for references to deleted codes.
8. Record your 2026 baseline: denial rate, days in A/R and revenue per delivery, so you can see what 2027 actually changed.

Get a Physician Review Before January

OB is our largest specialty, and we’ve spent most of this year inside the 2027 changes with our own OB clients. If you want to know where your practice is exposed before the first claim goes out, start here.

You can also watch our OB coding webinar and download the full 2027 toolkit on the OB webinar resources page, or read more about our OB/GYN billing services.

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