Global OB Billing Guide: CPT 59400, 59510, 59610, and 59618 Explained

Obstetric billing is unlike most other medical specialties. Instead of billing each service separately, many maternity services are reported using global OB CPT codes that bundle prenatal care, delivery, and postpartum care into a single reimbursement. Using the wrong code or misunderstanding what's included in the global package can lead to denied claims, underpayments, or compliance issues.

For OB/GYN practices, knowing when to bill a global maternity package and when to bill services individually is essential for maintaining clean claims and steady cash flow.

This guide explains four of the most commonly used global obstetric CPT codes: 59400, 59510, 59610, and 59618, what each code includes, when they should be reported, and the billing mistakes practices should avoid.

What Is Global OB Billing?

Global obstetric billing is a reimbursement method that combines routine maternity services into one CPT code instead of billing each visit separately.

A global maternity package generally includes:

• Routine prenatal visits

• Labor and delivery

• Postpartum care

Services that fall outside the global package may be billed separately when supported by documentation and payer policy.

CPT 59400: Routine Vaginal Delivery Package

CPT 59400 reports the complete maternity package for a routine vaginal delivery.

It generally includes:

• Routine prenatal care

• Vaginal delivery

• Routine postpartum care

This code is commonly reported when the same physician or group provides the patient's routine obstetric care from pregnancy through postpartum recovery.

CPT 59510: Cesarean Delivery Package

CPT 59510 is used when the global maternity package includes a cesarean delivery.

The code generally covers:

• Routine prenatal care

• Cesarean section

• Routine postpartum care

If another provider performs part of the patient's care, global billing may not apply, and individual services may need to be reported instead.

CPT 59610: VBAC Global Package

CPT 59610 applies when a patient successfully delivers vaginally after a previous cesarean section (VBAC).

The code includes:

• Routine prenatal care

• Vaginal birth after previous cesarean

• Routine postpartum care

Accurate documentation supporting the successful VBAC is essential for correct code selection.

CPT 59618: Cesarean Delivery After Attempted VBAC

CPT 59618 is reported when a patient attempts a vaginal birth after a previous cesarean but ultimately requires another cesarean delivery.

This global package includes:

• Routine prenatal care

• Cesarean delivery following attempted VBAC

• Routine postpartum care

Proper clinical documentation should clearly describe the attempted VBAC and the medical reason for proceeding with a cesarean delivery.

What Is Not Included in the Global OB Package?

Although global billing covers routine maternity care, several services may be

billed separately when payer guidelines allow.

Examples include:

• Ultrasound examinations

• Non-stress tests

• Biophysical profiles

• Laboratory testing

• Treatment of pregnancy complications

• High-risk maternal care

• Emergency department services

• Services unrelated to pregnancy

Practices should always verify payer-specific rules before billing additional services.

Common OB Billing Mistakes

Many maternity claim denials result from preventable billing errors.

The most common include:

• Billing a global package when another provider performed part of the care

• Reporting the wrong global CPT code

• Billing services already included in the package

• Missing documentation for VBAC services

• Incorrect modifier usage

• Failure to verify payer-specific maternity policies

Regular claim audits can help identify these issues before submission.

Read More About Pediatric CPT Codes: Common Codes Every Practice Should Know (2026 Guide)

Documentation Tips

To support accurate OB billing, documentation should clearly include:

• Estimated due date

• Dates of prenatal visits

• Delivery method

• Operative reports for cesarean deliveries

• VBAC documentation when applicable

• Postpartum visit documentation

• Any pregnancy complications requiring separate billing

Complete documentation helps reduce denials and supports medical necessity.

How Outsourced OB Billing Services Help

Specialized OB/GYN billing teams can improve claim accuracy by:

• Reviewing global maternity coding

• Verifying payer-specific maternity rules

• Identifying separately billable services

• Managing denied maternity claims

• Tracking accounts receivable

• Monitoring reimbursement trends

• Improving clean claim rates

For high-volume OB practices, experienced billing support helps reduce administrative workload while improving revenue cycle performance.

Conclusion

Understanding CPT codes 59400, 59510, 59610, and 59618 is essential for accurate obstetric billing. Selecting the correct global package, documenting services properly, and following payer-specific requirements can significantly reduce denials and improve reimbursement.

Practices that regularly review their maternity billing workflows are better positioned to maintain clean claims, minimize payment delays, and strengthen their overall revenue cycle.