What Is the OB Global Code Sunset?
As of September 2026, the American Medical Association has confirmed that 17 global obstetric CPT codes will be deleted on January 1, 2027, and replaced with itemized per-encounter codes across four separate phases of maternity care. For entrepreneurs starting a medical billing business, this is the largest single-specialty billing overhaul in decades, and it creates immediate demand for billing companies that understand the new code structure before most practices have started preparing.
- What is changing: Global bundled codes like 59400 (vaginal delivery package) and 59510 (cesarean delivery package) are being deleted. Practices will bill individual E/M codes for prenatal visits, new labor management codes for delivery, and separate postpartum codes instead of one lump-sum package.
- Why practices need help: The transition affects documentation workflows, payer contracts, revenue timing, and cash flow. A practice that bills a global code receives one payment after delivery. Under the new structure, the same care generates dozens of individual claims spread across the pregnancy.
- The business opportunity: OB/GYN practices that currently outsource billing will need a partner who understands the new codes. Practices that currently bill in-house may outsource for the first time because the complexity just doubled.
What Changed and Why It Matters Now
The AMA CPT Editorial Panel voted in September 2025 to restructure maternity care billing, and CMS released the proposed 2027 Medicare Physician Fee Schedule on July 14, 2026, which includes proposed relative values for the new obstetric codes. The comment period on the CMS proposed rule closes September 14, 2026, and the final rule is expected in November. The new codes take effect January 1, 2027, and nothing about the timeline is tentative.
The codes being deleted have been in use since the 1990s. Under the current system, a practice bills one global code that bundles all antepartum visits, the delivery, and postpartum care into a single payment. It is simple, but it has not reflected the reality of modern obstetric care for years. The new structure unbundles that package into four distinct phases:
- Antepartum care: billed per encounter using standard E/M codes, not bundled antepartum codes
- Labor management: billed using new dedicated codes (59080 through 59083) that did not previously exist
- Delivery care: billed using simplified delivery-only codes (59431, 59432, 59502, 59503)
- Postpartum care: billed per encounter using E/M codes, not bundled postpartum codes
For new billing company owners, the practical significance is this: a single pregnancy that used to generate one claim will now generate 15 to 25 individual claims, depending on the number of prenatal visits and the complexity of labor and delivery. That is a fundamental increase in billing volume per patient, and it requires a billing partner who can manage the documentation, coding, and submission for each encounter separately.
Who Does This Affect?
The OB global code sunset directly affects every practice that provides maternity care in the United States. That includes OB/GYN practices, family medicine physicians who deliver babies, certified nurse-midwife practices, and maternal-fetal medicine specialists. According to the American College of Obstetricians and Gynecologists, there are approximately 60,000 OB/GYNs practicing in the United States, and a significant share of them currently bill using the global codes that are being deleted.
The practices hit hardest will be small to mid-sized OB groups with 2 to 10 providers. These groups typically have one or two billers managing the entire revenue cycle, and the current global-code workflow is straightforward enough that many handle it in-house. The unbundled structure changes that equation. The volume of individual claims, the per-encounter documentation requirements, and the revenue timing shift from one post-delivery payment to ongoing per-visit billing will overwhelm practices that do not scale their billing capacity.
One question we hear constantly from new billing business owners is how to choose a specialty that has genuine outsourcing demand. The OB global code sunset is the clearest example we have seen in years: a specific regulatory change creating a specific operational problem that a billing company is built to solve.
What the Revenue Timing Shift Means for Practices
The revenue timing change is the part of this transition that most coverage of the OB code sunset overlooks, and it is the part that will push practices toward outsourcing.
Under the current global-code model, a practice submits one claim after delivery and receives one payment that covers the entire episode. Cash flow is simple but delayed: the practice performs 10 to 14 prenatal visits over 9 months before seeing any revenue from the pregnancy.
Under the new unbundled model, each prenatal visit is billed individually as an E/M encounter. Labor management is billed separately. Delivery is billed separately. Postpartum visits are billed separately. This means revenue starts flowing from the first prenatal visit rather than waiting until delivery, which is better for cash flow in theory, but only if every encounter is actually coded, documented, submitted, and collected. A practice that misses claims or falls behind on submissions will see the cash flow advantage evaporate.
| Factor | Global Code (Current) | Unbundled Codes (January 2027) |
| Claims per pregnancy | 1 | 15 to 25 |
| Revenue timing | One payment after delivery | Per-visit payments throughout pregnancy |
| Documentation burden | Summary documentation | Per-encounter documentation required |
| Denial risk surface | 1 claim to track | 15+ individual claims to track |
| Payer contract impact | One negotiated global rate | Individual rates per code, per payer |
| Cash flow pattern | Delayed lump sum | Distributed over pregnancy |
| Billing workload | Low | Significantly higher |
In our experience training new billing company founders, the practices most likely to outsource billing are those facing a sudden increase in administrative complexity. The OB global code sunset is exactly that kind of event: it multiplies the billing workload overnight, and the practices that were managing billing in-house with minimal staff are the ones most likely to need outside help.
The OB global code sunset is creating a specialty niche that did not exist six months ago. Billing companies that understand the new unbundled structure before January 2027 will have a measurable advantage over those that wait. Medical Billing Opportunity gives you the training and frameworks to launch a billing business built around high-demand specialties like OB/GYN. Over 15 years in the medical billing industry.
How to Position a New Billing Company for This Opportunity
If you are starting a medical billing business or looking for a specialty niche, the OB global code sunset provides a clear positioning strategy. Here is how to build toward it:
- Learn the new code structure now. Study the four phases (antepartum E/M, labor management, delivery, postpartum) and understand how each phase is documented and billed separately.
- Focus your outreach on small to mid-sized OB/GYN practices that currently bill in-house. These are the groups most likely to need outside help when the transition hits.
- Lead your prospecting with the transition itself. An email that says “Your global OB codes are being deleted on January 1 and your billing workflow needs to change” is far more specific than “We offer medical billing services.”
- Understand payer variation. CMS has proposed accepting the new codes for Medicare, but each commercial payer and state Medicaid program will set its own adoption timeline. A billing company that tracks which payers have adopted the new structure and which are still on the old codes provides value that practices cannot easily replicate in-house.
- Position yourself as transition-ready before January 2027. Practices that start looking for billing partners in December will choose the company that already speaks the new coding language.
For the broader client acquisition strategy, see our guide on how to get more leads for your medical billing business.
Common Misunderstandings About the OB Code Change
Across the entrepreneurs we work with at Medical Billing Opportunity, several misunderstandings about this transition keep surfacing. Clearing them up early will strengthen your positioning.
- The change is optional. It is not. The global codes are being deleted from the CPT code set entirely. After December 31, 2026, they cannot be billed. This is not a voluntary transition.
- It only affects Medicare. The CPT code deletion affects all payers. CMS has proposed accepting the new codes for Medicare. Commercial payers and state Medicaid programs will each set their own timelines, but the global codes disappear from the CPT book for everyone.
- Practices can figure it out themselves. Some will. But the jump from 1 claim per pregnancy to 15 to 25 claims per pregnancy is not a minor workflow adjustment. It requires new documentation templates, new claim submission cadences, and new denial tracking processes. That is exactly the operational complexity that drives outsourcing.
- It is too early to prepare. ACOG is already recommending that practices begin transition planning now and use modifier TH during the remainder of 2026 to flag claims for tracking. Billing companies that wait until January will be competing for clients that already chose a partner in the fall.
Where This Fits in the Billing Business Landscape
The OB global code sunset is the most concrete example of a trend that has been building across the medical billing industry: increasing coding complexity drives increasing outsourcing demand. The U.S. medical billing outsourcing market is projected to grow from $7.24 billion in 2026 to $21.41 billion by 2035, according to Towards Healthcare, driven largely by exactly this kind of regulatory complexity.
For a broader view of which specialties are generating the most outsourcing demand right now, see our analysis of which medical billing specialties need outside help most.
And if you are exploring the income potential of a specialty billing company, our medical billing business income breakdown covers revenue projections by provider type and claim volume.
Frequently Asked Questions
When do the global OB codes get deleted?
The 17 global obstetric CPT codes are deleted from the CPT code set on January 1, 2027. Practices should continue billing under the current codes through December 31, 2026, as confirmed by the AMA during its June 2026 educational webinar. The deletion is not optional, and it applies to all payers.
How many new codes replace the global OB package?
The AMA is adding 12 new codes and revising guidelines across four phases of maternity care: antepartum (E/M codes), labor management (new codes 59080 through 59083), delivery (59431, 59432, 59502, 59503), and postpartum (E/M codes). The final code language will appear in the CPT 2027 Professional Edition.
Does this create a real business opportunity for new billing companies?
Yes. The transition multiplies the number of claims per pregnancy from 1 to approximately 15 to 25, significantly increasing the billing workload. Small to mid-sized OB practices that currently bill in-house will face pressure to outsource, creating demand for billing companies that specialize in the new code structure.
Do I need OB/GYN experience to bill under the new codes?
No clinical experience is required. You need training on the new CPT code structure, E/M documentation requirements, and the payer-specific adoption timelines. Medical Billing Opportunity provides the foundational billing training that allows you to build specialty expertise on top of it.
How do commercial payers handle the transition?
Each commercial payer and state Medicaid program sets its own adoption timeline. CMS has proposed accepting the new codes for Medicare starting January 2027. Billing companies must track which payers have adopted the new structure and which require the old codes, creating ongoing operational value for provider clients.
What is modifier TH and why does it matter?
ACOG recommends that practices begin using modifier TH during the remainder of 2026 to flag obstetric claims for tracking purposes. This helps practices prepare for the transition and gives billing companies a data trail to analyze before the new codes take effect.
Next Steps
- New to the billing business? Start with our step-by-step startup guide to build your foundation before specializing.
- Want to understand billing business income? See our full income breakdown by provider type.
- Ready to build a billing business around a high-demand specialty? Schedule a discovery call with Medical Billing Opportunity.
The OB global code sunset is the kind of regulatory shift that creates new billing companies. Practices that need help will choose the billing partner who already understands the new code structure. Medical Billing Opportunity gives you the training, tools, and frameworks to launch a home-based billing business built for exactly this kind of opportunity. Over 15 years of experience in the medical billing industry. Your discovery call is free.
