From January 1, 2027, maternity care is no longer billed as one global code. The AMA’s 2027 CPT update deletes 17 maternity codes, including the familiar 59400, 59510 and 59610, and replaces them with codes for each phase of care. For out-of-network OB/GYN practices, that changes three things in federal IDR: how plans calculate the QPA, which line items are protected, and what evidence supports your offer.
This guide covers when OB/GYN care is protected by the No Surprises Act, then what the new codes mean for disputes.
When OB/GYN care is protected
| Situation | Protected? | Can the patient waive it? |
|---|---|---|
| Unscheduled labor or obstetric emergency presenting as an emergency | Yes — emergency services | No |
| Post-stabilization care after an emergency admission | Yes, until notice-and-consent conditions are met | Only if every condition is met |
| Scheduled delivery or surgery by an out-of-network OB at an in-network hospital or ASC | Yes | Yes, with valid notice and consent |
| Assistant surgeon at a cesarean, at an in-network facility | Yes | No — ancillary service |
| Prenatal or gynecology visit in your own office | Generally no | — |
| Scheduled care at an out-of-network hospital | Generally no | — |
Two points cause most of the confusion:
- Obstetrics isn’t an ancillary service. Anesthesiology, neonatology, pathology, radiology, assistant surgeons, hospitalists and intensivists can never use notice and consent at an in-network facility. A patient’s own obstetrician can, for scheduled care, if the strict timing and form requirements are met. If consent wasn’t valid, the claim is protected and goes through open negotiation and IDR.
- Labor is often an emergency. Labor that presents unscheduled can be an emergency medical condition, and emergency services can’t be waived. Whether a particular triage visit qualifies depends on the facts, so document how the patient presented.
What changes in 2027
Under the AMA’s 2027 maternity code set, maternity care is reported in four phases:
- Antepartum care: each visit reported as an E/M encounter, replacing the antepartum package codes.
- Labor management: reported once per calendar day, as an initial or subsequent day, at two complexity levels (straightforward and complex).
- Delivery: new codes for vaginal delivery, VBAC, and primary and repeat cesarean, plus separate codes for third- and fourth-degree laceration repair and post-cesarean hysterectomy.
- Postpartum care: each visit reported as an E/M encounter. Routine postpartum care on the day of delivery is included in the delivery code.
In all, 17 codes were deleted, 12 added and 6 revised. Separately, CMS’s proposed 2027 Medicare physician fee schedule includes HCPCS G-codes that would preserve global maternity billing alongside the new CPT codes. ACOG has opposed that dual system. As of this writing the proposal isn’t final, and private plans will set their own policies, so expect some payers to use the new CPT codes and others to keep a global structure.
How the new codes affect the QPA
The QPA is built from a plan’s 2019 contracted rates for the same service code. A code created in 2027 has no 2019 rates. The federal rules treat it as a new service code, and where the plan doesn’t have enough contracted rates, it must:
- Pick a reasonably related code that existed the year before, such as a legacy delivery-only code.
- Scale it by Medicare. If Medicare has set a rate for the new code, the plan multiplies the related code’s QPA by the ratio of the Medicare rate for the new code to the Medicare rate for the related code.
That makes every 2027 maternity QPA a crosswalk, and crosswalks go wrong in predictable ways:
- The wrong related code. A delivery-only code paired with a legacy global code, or the reverse, can distort the QPA badly.
- Labor management with nothing to compare. Per-day labor management codes have no clean legacy equivalent. Ask how the plan arrived at its figure.
- G-codes and CPT codes mixed together. A plan paying on one system and calculating the QPA on the other may not be comparing like with like.
In 2027, ask in writing how each QPA was calculated, including which code it was crosswalked from. Plans must disclose more about the calculation on request, and a first-year QPA is the one most likely to be wrong. Background in What Is a QPA?
Note the irony: Medicare rates drive the plan’s QPA crosswalk, but the IDR entity may not consider Medicare rates when choosing an offer. Your offer has to stand on the permitted factors.
Batching and deadlines
- More line items, more clocks. One global claim used to cover the whole pregnancy. Phase-level billing produces separate claims for labor days, delivery and postpartum care, and the 30-business-day open negotiation window runs from each initial payment or denial.
- Batching follows the code. Federal IDR groups qualifying claims for the same or similar service, which means the same service code. Distinct delivery and labor-management codes make batches cleaner, but a batch that mixes codes or complexity levels can be challenged.
- Pregnancies that span January 1, 2027. Prenatal care started under the global structure, with delivery after the switch, will be billed under each payer’s transition policy. Check those policies before relying on any QPA or payment from that period.
Building the IDR offer
The new codes help here. The IDR entity weighs the QPA alongside patient acuity, service complexity, training and experience and contracting history, and complex labor-management days now document acuity on the claim itself:
- Acuity: high-risk pregnancy, prolonged induction, preeclampsia, multiples or prior cesarean, recorded in the labor-management complexity level and supported by the record.
- Training and experience: maternal-fetal medicine subspecialty care, or round-the-clock in-house coverage.
- Contracting history: documented attempts to join the plan’s network.
Billed charges and Medicare rates can’t be considered. See how to handle out-of-network underpayments for sorting rate disputes from coding errors before you file.
Before January 1, 2027
- Train billing staff on phase-level coding and the labor-management complexity levels.
- Collect each major payer’s 2027 maternity policy: new CPT codes, G-codes or something else.
- Review notice-and-consent forms used for scheduled out-of-network deliveries.
- Set up QPA tracking by new code so first-year crosswalk errors stand out.
This guide is general information, not legal advice. Coding and payment policies for 2027 are still being finalized; confirm current requirements with the AMA, CMS and each payer, and at cms.gov/nosurprises.