The 2027 global maternity billing transition from bundled to service-based reimbursement is the largest change to OB/GYN billing in decades. Here's what's changing and how to prepare now.
The 2027 maternity billing transition represents the most significant change to OB/GYN reimbursement in a generation. CMS has proposed moving from the current global maternity package model to a service-based (component) billing model — and if your practice is not preparing now, the revenue impact could be severe.
What Is Changing
Under the current global maternity package model, CPT codes like 59400 (vaginal delivery with antepartum and postpartum) bundle all prenatal visits, delivery, and postpartum care into a single fee. This fee is paid once, regardless of how many visits were actually provided.
Under the proposed 2027 model, each service component would be billed separately:
- ›Every antepartum visit billed as a standalone E/M service
- ›Delivery billed as a separate procedure
- ›Postpartum visits billed individually
- ›Additional services (ultrasound, stress tests, amniocentesis) billed as always
This is fundamentally how most other specialties bill — but it's a complete operational overhaul for OB/GYN practices.
Why CMS Is Making This Change
The shift is driven by several policy goals:
1. Better data collection: Under global packages, CMS cannot easily identify how many prenatal visits a patient actually received or the quality of antepartum care
2. Telehealth integration: The telehealth-era flexibility created billing confusion when some visits were virtual and some in-person within a global package
3. Value-based care alignment: Service-based billing allows payers to attach quality metrics to individual service components
4. Equity concerns: Global package underpayment in Medicaid has been linked to access disparities in rural areas
Timeline (As Currently Proposed)
- ›2026: CMS publishes final rule (expected Q3 2026)
- ›January 1, 2027: New service-based codes effective for Medicare and most Medicaid programs
- ›2027–2028: Commercial payer contracts transition over 12–24 months following federal lead
Note: Many commercial payers are already preparing contract language based on the expected transition.
How to Prepare Now
1. Audit Your Current Global Package Revenue
Before the transition, understand your current global maternity revenue baseline:
- ›How many global deliveries per month?
- ›Average reimbursement per global package by payer?
- ›Average antepartum visits per patient?
- ›Current postpartum visit capture rate?
This data tells you whether the transition will increase or decrease your revenue — and by how much.
2. Upgrade Your EHR Visit Tracking
Under service-based billing, every antepartum visit needs an independently billable E/M code (99212–99214 depending on complexity). Your EHR must:
- ›Create a separate charge for every visit
- ›Assign MDM-appropriate E/M level to each prenatal visit
- ›Track which services are billable vs. included
Most EHR systems will require configuration updates when the final rule is published.
3. Renegotiate Commercial Contracts
Global maternity rates are embedded in your current commercial contracts. As payers transition to service-based reimbursement, they will attempt to set individual visit rates that may total less than your current global package rate.
Begin contract review discussions with your major commercial payers in late 2026 — before the transition, while you still have leverage.
4. Update Your Fee Schedule
Your fee schedule will need to include:
- ›Per-visit antepartum E/M codes with appropriate charges
- ›Delivery-only codes with current market rates
- ›Postpartum visit codes
5. Train Your Billing and Clinical Staff
This transition changes how clinical staff documents prenatal visits. Each visit will need visit-level documentation supporting the billed E/M code — not just a "routine OB visit" note that was acceptable under the global package model.
Revenue Impact
For practices that currently underprovide antepartum visits (delivering patients with fewer than the 13-visit standard), service-based billing may reduce revenue. For practices that routinely document high-complexity antepartum care and see patients for the full antepartum schedule, the transition could increase revenue.
The critical factor: documentation quality. Under the current model, documentation errors cost you relatively little because the global fee is predetermined. Under service-based billing, every visit's revenue depends on the documentation supporting the E/M code billed.
What We Recommend
Start the transition preparation now — in 2026 — with a baseline coding audit that:
1. Documents your current global maternity revenue
2. Identifies documentation gaps in your antepartum visit notes
3. Quantifies the revenue impact of the transition under different scenarios
4. Creates a training plan for your clinical team
Practices that wait until Q4 2026 to prepare will struggle with the operational complexity of the transition. Practices that start in mid-2026 will be positioned to maintain or increase revenue from day one of the new model.