A Major Shift in How Obstetric Care Is Billed
For decades, obstetric practices have relied on a single global billing code to cover an entire pregnancy — from the first prenatal visit through delivery and postpartum recovery. That approach was designed to keep billing simple. But pregnancy care today looks nothing like it did when the global model was created, and the one-size-fits-all code hasn’t kept pace with how varied and complex maternity care has become.
That’s about to change. Beginning January 1, 2027, the Current Procedural Terminology (CPT) code set will unbundle obstetric care into four distinct phases: antepartum care, labor management, delivery, and postpartum care. Each phase will be billed separately, giving practices a far more accurate way to capture the actual work involved in a pregnancy.
The update is substantial: 17 codes are being deleted, 12 new codes are being introduced, and six existing codes are being revised. Subsection guidelines have also been significantly rewritten, and several existing codes have been renumbered. For OB/GYN practices, hospitals, and medical billing teams, this is one of the most significant coding overhauls in maternity care in years — and preparation needs to start well before the effective date.
Here’s a breakdown of what’s changing in each phase of care.
Antepartum Care: Billed Visit-by-Visit, Not as a Package
Antepartum (prenatal) care covers every visit from the confirmation of pregnancy through the onset of labor. Under the new structure, each of these encounters will be billed using the standard evaluation and management (E/M) code that matches the setting and complexity of the visit, rather than being folded into a single global fee.
This change aligns with the American College of Obstetricians and Gynecologists’ (ACOG) clinical consensus on Tailored Prenatal Care Delivery for Pregnant Individuals. Traditionally, prenatal care has followed a fixed schedule — roughly 12 to 14 visits, spaced every four weeks until month seven, every two weeks until month eight, and weekly after that. Starting in 2027, visit frequency will instead be driven by clinical need: medical comorbidities, pregnancy complications, social determinants of health, and individual patient circumstances.
Codes Used for Antepartum Visits
Depending on where and how the visit takes place, antepartum encounters will be reported using:
- Office or outpatient visits: 99202–99205, 99211–99215
- Home or residence visits: 99341, 99342, 99344, 99345, 99347–99350
- Inpatient or observation care: 99221–99223, 99231–99233
- Admission and discharge on the same day: 99234–99236
- Critical care services: 99291, 99292
- Telemedicine visits: 98000–98015
- Virtual check-ins: 98016
Diagnostic and therapeutic procedures performed during pregnancy — including obstetric ultrasounds (76801–76828) and fetal MRI (74712–74713) — remain separately reportable alongside these E/M visits.
One notable deletion: CPT code 59050, previously used when a consulting physician supervised labor and interpreted fetal monitoring, is being retired. Documentation should shift to code 59051 for interpretation and reporting of fetal heart tracings. Any other consultation involving evaluation of the pregnant patient or fetus should simply be reported using the appropriate E/M code.
Modifier -25 Still Applies
If a patient is seen for a non-obstetric issue — say, an unrelated illness or injury — on the same day as a routine OB visit, that encounter requires modifier -25 to indicate it was a significant, separately identifiable service. The visit will also need a diagnosis unrelated to the pregnancy to justify billing it apart from routine obstetric care and to avoid claim denials.
High-risk pregnancy surveillance visits should always carry the diagnosis code that supports the increased visit frequency.
Labor Management: An Entirely New Set of Codes
The intrapartum period — from the onset of regular contractions through delivery of the baby and placenta — gets its own dedicated, brand-new code set in 2027.
Labor management covers care for both the parturient and the fetus(es), including management of comorbid conditions like diabetes or hypertension, and complications such as preeclampsia, abnormal fetal heart rate patterns, or prolonged labor. All of this falls under the labor management umbrella.
Straightforward vs. Complex Labor Management
Labor management is now classified as either straightforward or complex, based on medical decision-making complexity — not on how long labor lasts. Time alone doesn’t justify a higher-complexity code unless the patient is specifically diagnosed with prolonged labor, which ACOG defines as no cervical dilation progress in a patient at 6 cm or more with ruptured membranes, after four hours of adequate contractions (or six hours with Pitocin augmentation for inadequate contractions).
Only the highest level of labor management provided is billed per calendar date. For example, if a patient is admitted in stable condition with no complications (straightforward) but develops fetal heart rate decelerations and a fever hours later, only the complex code is billed for that date — not both.
%%AMCIL_PROTECT_12%% Day Codes
New codes distinguish between the first day of labor management and every day after:
- Initial day codes (59080 or 59081) apply only when:
- It’s the first date of service for labor management or induction
- No prior labor management has been billed during the same admission
- The patient has transferred facilities mid-labor
- A different specialty or subspecialty provider assumes care for medically necessary reasons
- Subsequent day codes apply to each additional day of face-to-face labor management, billed once per calendar date regardless of how many visits occurred or which provider performed them.
Additional Labor Management Rules
- Initial and subsequent day codes cannot both be billed on the same date.
- If a consulting provider doesn’t assume care, bill the standard E/M code instead.
- Labor management codes should not be used for a planned cesarean section with no signs of labor.
- Multiple gestations are billed once per day, regardless of fetus count.
- Patients presenting for induction should be billed with the appropriate labor management code — not hospital observation codes.
- A continuous labor encounter spanning two calendar days is billed once, on one of the two dates.
Delivery Care: Separated from Labor Management
Delivery is considered complete once the fetus crowns or, in the case of a cesarean, once the surgery begins. Immediate post-delivery care on the same calendar day is bundled into the delivery code and isn’t billed separately — and importantly, delivery codes no longer include the work of labor management, which is now billed independently.
Vaginal Delivery
- Repair of a first- or second-degree laceration or episiotomy is included in vaginal delivery codes 59431 and 59432. It can only be billed separately (code 59300) if performed by a different provider than the one who handled delivery.
- Third- or fourth-degree repairs (codes 59433, 59434) can be billed in addition to the vaginal delivery code.
- Placental delivery (59414) is bundled into the delivery service and shouldn’t be billed separately by the delivering provider or a same-specialty colleague in the same group. It’s only reportable when a different, unaffiliated provider performs it.
- Breech deliveries require modifier -22 (increased procedural services) appended to the vaginal delivery code.
- For multiple gestations, bill one vaginal delivery code per fetus delivered vaginally. If some fetuses are delivered vaginally and others via cesarean, bill the vaginal code per vaginal delivery and the cesarean code once, regardless of how many fetuses were delivered surgically.
Cesarean Delivery
- Primary cesarean (59502): used for a patient with no prior cesarean history. These are often unplanned, triggered by complications like arrested labor or fetal distress, though they can also be scheduled in advance for reasons like breech presentation without a prior vaginal delivery, or active genital herpes.
- Repeat cesarean (59503): typically planned due to risk of uterine rupture at a prior incision site. Because the decision for surgery is made in advance, same-day E/M visits aren’t separately billable.
- If a hysterectomy is performed during the same operative session, bill 59504. If the same physician performs both procedures, append modifier -51.
- If a tubal ligation is performed at the same time as a cesarean, bill 58611, with modifier -51 if performed by the same physician who did the delivery and any related procedure.
Postpartum Care
All care provided on the delivery date is bundled into the delivery code. Every visit after that — inpatient, outpatient, or at-home — is billed using the appropriate E/M code based on setting. Non-surgical postpartum complications that require additional visits need a supporting ICD-10-CM diagnosis code to justify the added frequency. Surgical treatment of delivery complications is billed separately using the relevant CPT and ICD-10-CM codes.
What This Means for Your Practice
This isn’t a minor coding update — it’s a structural change to how maternity care is documented, billed, and reimbursed. While the new codes are already priced into the Medicare Physician Fee Schedule, ACOG has raised concerns that CMS may introduce 15 additional HCPCS G-codes in 2027 that would essentially preserve the old global billing structure alongside the new CPT codes. ACOG argues this dual system could discourage adoption of the more accurate CPT model and add unnecessary administrative burden for practices already managing the transition.
How to Prepare Before January 1, 2027
- Update charge capture and EHR systems to reflect the new code set and deleted codes.
- Train providers and coding staff on the distinction between straightforward and complex labor management, and on correctly applying initial vs. subsequent day codes.
- Review documentation templates to ensure visit notes support the level of E/M service billed for each antepartum, labor, and postpartum encounter.
- Monitor the OPPS final rule and CMS guidance closely, particularly regarding the proposed G-codes.
Getting ahead of these changes now — rather than scrambling in early 2027 — will help practices avoid claim denials, underpayment, and compliance risk once the new coding structure takes effect.
