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Maternity Obstetrical Care Medical Billing & Coding Guide (2026)

Maternity Obstetrical Care Medical Billing & Coding Guide for 2025

Table of Contents

The Global Obstetrical Package

Maternity billing combines strict coding guidelines, payer policies, and precise documentation requirements. Accurate billing ensures compliance, minimizes denials, and supports appropriate reimbursement for obstetric providers. 

This guide outlines current maternity billing practices, global package rules, coding pathways, documentation expectations, and payer considerations applicable for 2026. 

Partner with Neolytix to bring precision, efficiency, and expertise to your maternity and OB/GYN billing operations. 

The Global Obstetrical Package

The Global Obstetrical Package is the foundation of maternity billing. It bundles routine antepartum, intrapartum, and postpartum services into a single payment for uncomplicated pregnancies — defined by AMA CPT guidance as routine maternity care including antepartum, delivery, and postpartum services. 

The global package generally covers three phases of care: 

Antepartum Care: Routine prenatal visits, examinations, and basic diagnostics throughout pregnancy. 

Intrapartum Care: Labor management, delivery (vaginal or cesarean), and immediate postpartum recovery. 

Postpartum Care: Follow-up visits and routine care typically within six weeks after delivery. 

Key global billing rules: 

  • Care must be provided by one provider or providers within the same group practice (same tax ID) 
  • Documentation must support antepartum, delivery, and postpartum services 
  • If all three phases are not provided by the same provider or group, individual service billing must be used instead of global billing 
  • Individual E&M codes should not be billed for routine prenatal visits when the global package applies, unless services fall outside the routine maternity scope 

Many major commercial insurers — including Blue Cross Blue Shield, UnitedHealthcare, and Aetna — reimburse based on global maternity codes when eligibility criteria are met. 

Services Bundled Within the Global Obstetrical Package

Understanding exactly what is and is not included in the Global Package is a critical part of maternity obstetrical care medical billing. 

Antepartum Care (Included)

  • Initial prenatal history and physical examination 
  • Routine prenatal visits (approximately 13 visits) 
  • Monitoring of weight, blood pressure, and fetal heart tones 
  • Routine urinalysis 
  • Patient education related to pregnancy and breastfeeding 

Important: Any unrelated medical visit during the antepartum period must be billed separately. For example, if a patient presents with the flu during a prenatal visit period, a separate E&M code should be used for that encounter. 

Intrapartum Care — Labor & Delivery (Included)

  • Hospital admission evaluation 
  • Labor management and fetal monitoring 
  • Vaginal or cesarean delivery 
  • Delivery of placenta 
  • Immediate postpartum stabilization 

Postpartum Care (Included)

  • Routine inpatient and outpatient postpartum visits 
  • Basic postpartum recovery care 
  • Breastfeeding guidance 
  • Contraception counseling 

Services Excluded from the Global Obstetrical Package

The following services are always billed separately — they are not included in the Global Package regardless of when they occur during the pregnancy: 

  • Pregnancy confirmation visits 
  • Non-routine laboratory tests 
  • Amniocentesis, chorionic villus sampling (CVS), and fetal testing procedures 
  • External cephalic version 
  • Cerclage procedures 
  • Management of unrelated medical conditions 
  • Surgical procedures unrelated to delivery 
  • Third- or fourth-degree laceration repair 
  • Contraceptive insertions

Documentation must clearly support separate billing for each excluded service. 

CPT Codes for Maternity Care (2026)

Global OB package CPT codes remain structurally unchanged for 2026.

Global Package Codes

CPT Code 

Description 

59400 

Routine obstetric care — antepartum, vaginal delivery (with or without episiotomy and/or forceps), and postpartum care 

59510 

Routine obstetric care — antepartum, cesarean delivery, and postpartum care 

59610 

Routine obstetric care — antepartum, vaginal delivery after previous cesarean (VBAC), and postpartum care 

59618 

Routine obstetric care — antepartum, cesarean delivery following attempted vaginal delivery after previous cesarean, and postpartum care 

Split Billing Scenarios

Split billing is required when care is not provided continuously by one provider or group. Common situations include transfer of care, late prenatal entry, insurance change mid-pregnancy, or delivery performed by a different provider. 

Split Care CPT Codes

CPT Code 

Description 

59425 

Antepartum care only — 4 to 6 visits 

59426 

Antepartum care only — 7 or more visits 

59409 

Vaginal delivery only (with or without episiotomy and/or forceps) 

59514 

Cesarean delivery only 

59612 

Vaginal delivery only after previous cesarean delivery 

59620 

Cesarean delivery only following attempted vaginal delivery after previous cesarean 

59430 

Postpartum care only (separate procedure) 

Billing should reflect only the services rendered. Clear communication with insurers and thorough documentation are essential to prevent denials in split care scenarios. 

Twin Delivery / Multiple Gestation Billing

Multiple gestation billing requires separate coding for each fetus, appropriate modifier usage (Modifier 59, 51, or others based on payer guidance), and clear documentation for each delivery. Guidance remains aligned with recommendations from the American College of Obstetricians and Gynecologists (ACOG). 

High-Risk Pregnancy Billing

High-risk pregnancies require additional monitoring and frequently fall outside the scope of routine global care. Common high-risk conditions include hypertension, diabetes, pre-eclampsia, advanced maternal age, and placental abnormalities. Maternal-fetal medicine (MFM) services are typically billed separately when care is co-managed with a specialist. 

ICD-10-CM updates released October 2024 — still active in 2026 — expanded diagnosis reporting for diabetes staging, obesity classes, hypoglycemia, genetic susceptibility conditions, and social determinants of health. 

Important Coding Rule: When a patient considered high-risk delivers without complications, the delivery must be coded as a normal delivery per ICD-10-CM guidelines — not as a high-risk encounter. 

Example: A patient expected to be 35 at delivery, with supervision coded as O09.523 (supervision of elderly multigravida) during pregnancy, delivers a healthy fetus at 35 weeks gestation at age 34 with no complications. The correct diagnosis codes are O80 (normal vaginal delivery), Z3A.35 (35 weeks gestation), and Z37.0 (single liveborn infant, delivered vaginally). 

Ultrasound Billing

Common obstetric ultrasound CPT codes remain unchanged for 2026. 

CPT Code 

Description 

76801–76810 

Basic fetal evaluation 

76811–76812 

Detailed fetal anatomy scan 

76813–76814 

Nuchal translucency measurement 

76815 

Limited obstetric ultrasound 

76816 

Follow-up or repeat obstetric ultrasound 

76817 

Transvaginal ultrasound 

76818–76819 

Biophysical profile 

59025 

Non-stress test (NST) 

Modifier usage must accurately reflect multiple gestation, separate encounters, and distinct procedures where applicable.

Trimesters of Pregnancy and Gestational Age Coding

ICD-10-CM trimester definitions remain unchanged: 

Trimester 

Gestational Range 

First trimester 

Less than 14 weeks 

Second trimester 

14 weeks to less than 28 weeks 

Third trimester 

28 weeks through delivery 

Code Z3A.- must be reported to specify the gestational week at the time of service. 

Diagnosis Coding for Deliveries

Scenario 

Code Guidance 

Routine prenatal visits without complications 

Z34.- 

Outcome of delivery 

Z37.- (required on all delivery claims) 

Full-term normal delivery with no complications 

O80 

Pregnancy-related complications 

O-code series 

Principal diagnosis selection depends on the reason for admission and the circumstances of delivery. When complications are present, the appropriate O-code takes precedence over Z34.- or O80. 

Common Modifiers in Maternity Billing (2026)

Modifier 

Description 

22 

Increased procedural services — complexity beyond typical 

24 

Unrelated E&M service during postoperative period 

25 

Significant, separately identifiable E&M on the same day as a procedure 

51 

Multiple procedures performed during the same session 

57 

Decision for surgery made at the E&M visit 

78 

Unplanned return to the operating room during postoperative period 

80 / 82 

Assistant surgeon 

59 / XE / XS / XP / XU 

Distinct procedural services 

Documentation must clearly support every modifier applied.

Importance of the Global OB Package: What Coders Must Review

Navigating the complexities of maternity billing shouldn’t burden your team. At Neolytix, we specialize in accurate OB/GYN and multi-specialty billing and coding, revenue cycle management and medical credentialing, and medical coding audits for compliance and accuracy. 

At Neolytix, we provide: 

  • Specialty-specific medical billing and coding for OB/GYN and maternity practices 
  • Medical coding audit services to identify global package errors and reduce denial rates 
  • Revenue cycle management to improve collections and accelerate reimbursement 
  • Compliance support including split billing guidance, modifier accuracy, and high-risk pregnancy coding 

With over 14 years of experience supporting healthcare organizations across the United States, Neolytix brings the expertise your obstetric practice needs to stay compliant, reduce denials, and protect revenue. 

Schedule a Free Consultation to learn how we can optimize your maternity billing operations. 

Frequently Asked Questions

What is the Global Obstetrical Package and what does it include?

The Global Obstetrical Package bundles routine antepartum care (approximately 13 prenatal visits), labor and delivery management, and postpartum care into a single reimbursement for uncomplicated pregnancies. Global billing applies when all three phases of care are provided by the same provider or group practice under the same tax ID. 

Individual codes are used when a provider does not deliver all three phases of care — for example, in transfer of care, late prenatal entry, or when delivery is performed by a different provider. Split billing codes (59425, 59426, 59409, 59514, 59430) are used to bill only the services actually rendered.

Services always billed separately include pregnancy confirmation visits, non-routine laboratory tests, amniocentesis, CVS, external cephalic version, cerclage, management of unrelated medical conditions, third- or fourth-degree laceration repair, and contraceptive insertions. Documentation must clearly support separate billing for each.

Per ICD-10-CM guidelines, when a patient with a high-risk designation delivers without complications, the delivery must be coded as a normal delivery (O80) — not as a high-risk encounter. The high-risk supervision code used during antepartum care does not carry over to the delivery if the delivery itself is uncomplicated.

Modifier 22 is appended to indicate that the service required substantially more work than typically described by the CPT code — for example, a cesarean delivery complicated by severe adhesions or other significant intraoperative findings. An operative report clearly documenting the increased complexity must support its use.