OB/GYN Billing Services
OB/GYN revenue is decided by one boundary: what the maternity package already paid for and what it did not. One fee covers the routine antepartum care, the delivery and the postpartum care when one practice furnishes all three. The package comes apart on discontinuity: a patient who began prenatal care elsewhere, transferred out before delivery, or changed plans mid-pregnancy is not a package patient, and billing her as one is what gets taken back. Gestational diabetes, preeclampsia, preterm labor and hyperemesis get treated constantly, then folded into a routine prenatal note where nothing can bill them. Obstetric ultrasound is the same story: the indication in the record, not a rule of thumb about frequency, makes the study payable.
We take that boundary work on. We check continuity of care at the first prenatal encounter and at delivery, so the package is billed only when this practice furnished all of it, and split the antepartum, delivery and postpartum billing when it did not. We code complications as they are documented rather than reconstructing them after delivery, verify each plan's own maternity policy, and package high-complexity cesareans with the comparison language an increased-procedural-services review turns on. We bill the gynecologic surgical and preventive side against the same discipline. This is for OB/GYN practices carrying their own prenatal panels and GYN surgery, and for groups whose package-versus-split billing is inconsistent between providers.
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What makes OB/GYN billing different?
The maternity package. One fee covers the routine antepartum care, the delivery and the postpartum care when a single practice furnishes all three, so the work is deciding what actually sits inside that fee and billing the rest on purpose. We check continuity of care before we bill the package, split the antepartum, delivery and postpartum billing when care was shared, and bill complications and indicated testing separately, on the documentation each plan requires. One thing worth settling up front: CPT describes the antepartum component as a schedule — monthly visits to 28 weeks, every two weeks to 36 weeks, weekly until delivery — not as a fixed count, so the widely quoted “13 visits” is arithmetic on that schedule rather than a number CPT publishes, and some payers state outright that no specific count is required. On Medicare's fee schedule these codes also carry a maternity global indicator (MMM), so the usual 10- and 90-day postoperative global rules do not apply to them — a status published in CMS's relative value files and checked 17 September 2026.
- Maternity packages 59400 vaginal, 59510 cesarean, 59610 VBAC — one fee, one practice, all three components
- Split care: antepartum-only 59425 (4–6 visits) or 59426 (7 or more), delivery-only 59409/59514, postpartum-only 59430
- Separately billable: antepartum testing 59025, medically indicated ultrasound, visits for pregnancy complications
- Payer changes and transferred care reconciled against what the other practice already billed
Who This Page Is For
Common Billing Friction in OB/GYN
What the maternity package includes — and when it comes apart
The maternity global codes (59400 vaginal, 59510 cesarean, 59610 VBAC) pay one fee for routine antepartum care, the delivery and postpartum care furnished by the same practice. CPT's maternity care guidelines define the antepartum component as a visit schedule — monthly to 28 weeks, every two weeks to 36 weeks, weekly until delivery — not as a fixed visit count, and payer policy differs on whether a count matters at all: Washington State's Health Care Authority says in its Pregnancy Related Services billing guide (effective 1 January 2026) that it does not require a specific number of antepartum visits to bill the global package. We could not retrieve a published visit-count audit rule from any national commercial carrier, so we do not bill as though one exists. What we do track is discontinuity — care that started elsewhere, care transferred out, a plan change mid-pregnancy — because that is what decides whether the global code is billable in the first place. Worth knowing alongside it: Medicare's physician fee schedule assigns the maternity codes a maternity global indicator (MMM), so the 10- and 90-day postoperative global periods that drive modifier 24 elsewhere do not apply here. What sits inside the fee is set by the maternity package definition and the plan's own policy, not by a surgical global period. Everything in this section is the professional-component claim; the hospital bills its own facility charges separately.
Pregnancy complications billed outside the package (modifier 25 discipline)
Conditions arising during pregnancy that fall outside routine prenatal care are separately billable from the maternity package: gestational diabetes management (ICD-10 O24.4-), preeclampsia monitoring (O14.-), preterm labor evaluation (O60.0-), hyperemesis gravidarum (O21.-) and threatened abortion all generate billable encounters when the record documents the problem and the work done for it. Modifier 25 marks a significant, separately identifiable evaluation and management service furnished on the same day as another procedure or service. The capture depends entirely on the complication being documented as a distinct problem rather than folded into a routine prenatal note — there is no coding trick that recovers a complication the note never separated out. Transferred-care patients follow the same discipline on the package side: antepartum-only 59425 (four to six visits) or 59426 (seven or more), with 59430 for postpartum care alone.
Obstetric ultrasound and antepartum testing — indication before frequency
Obstetric ultrasounds bill outside the maternity package when the record documents a medical indication. 76801 is the first-trimester (under 14 weeks 0 days) transabdominal study of a single or first gestation; 76811 is the detailed fetal anatomic evaluation; 76816 is the follow-up study, reported per fetus, for re-evaluating fetal growth or a finding that was abnormal on a previous scan; 76818 and 76819 are the biophysical profiles with and without non-stress testing. Some commercial maternity policies fold the first dating study into the global package, and some apply frequency edits to repeat growth studies in low-risk pregnancies. We could not retrieve a current published policy from any specific national carrier stating either rule, so we verify the member's own plan document before billing rather than repeating a rule of thumb. What is constant is that the diagnosis has to carry the indication: routine pregnancy alone does not clear a frequency edit.
Cesarean coding — planned, unplanned, and modifier 22 for documented complexity
A routine planned cesarean bills 59510 as the maternity package or 59514 for the delivery only. When a vaginal delivery converts to an unplanned cesarean after labor has begun, coding routes through the cesarean code with documentation establishing the trial of labor and why it was abandoned; a failed trial of labor after previous cesarean that converts adds 59618. Modifier 22 applies when the operative report documents work substantially greater than the typical case — extensive adhesions from prior surgery, morbid obesity, placenta accreta requiring extended dissection. Payment for modifier 22 is not a published percentage uplift; it is an individual-review decision, and the only thing that moves it is an operative note that compares the typical case with this one in specific, measurable terms. We package that comparison for review rather than promising an increase.
Preventive GYN visits, the Pap cytology split, and Medicare's own screening codes
Annual preventive visits for adult women use 99395 (age 18–39, established patient) and 99396 (age 40–64); Pap collection is part of the visit, while the cytology itself is billed by the laboratory that performs it. The cytology code follows the preparation: 88142 is the liquid-based automated thin-layer preparation with manual screening, while conventional smear cytology is a different family (88150 and up). High-risk HPV testing is 87624; 87625 reports types 16 and 18 only. Medicare does not pay the preventive visit codes at all — 99395 and 99396 carry a non-covered status on the physician fee schedule — and uses its own screening codes instead: G0101 for the screening pelvic and clinical breast examination, Q0091 for obtaining and conveying the screening Pap, G0123 for screening thin-layer cytology screened by a cytotechnologist under physician supervision, and G0124 when that same preparation requires interpretation by a physician. Cell-free DNA aneuploidy screening is 81420; 88299 is the unlisted cytogenetic study code and is not a substitute for it. Contraceptive management runs through its own procedures — 11981 for insertion of a non-biodegradable drug delivery implant, 58300 for IUD insertion — and either can be reported on the same day as a problem-focused E/M with modifier 25 when the record supports both. Maternal-fetal medicine consultation follows its own authorization path, and like cell-free DNA screening it is plan-specific enough to check against the member's benefit rather than assume.
OB/GYN-Specific Payer Issues We Watch For
Medicare
Issue: There is no blanket Medicare exclusion for obstetric care — the delivery codes are active, payable codes on the physician fee schedule. What Medicare does not cover is the routine preventive well-woman visit, and beneficiaries carrying Medicare as a secondary payer need the crossover handled or the claim rejects
Our approach: We bill Medicare's own screening codes — G0101 for the screening pelvic and clinical breast examination, Q0091 for obtaining and conveying the screening Pap — rather than the preventive visit codes it does not pay, and sequence primary and secondary claims so covered services survive the crossover
UnitedHealthcare
Issue: Commercial maternity policies differ on what the package absorbs and on how a mid-pregnancy switch between global and split billing is handled; we could not retrieve a current published UnitedHealthcare statement on either, so we will not bill against an assumed rule
Our approach: We pull the member's own plan maternity policy at eligibility, record what it says about the package, and keep antepartum documentation assembled so the billed code can be defended on the record
Aetna
Issue: Whether the first dating ultrasound sits inside the maternity package is a plan-level decision rather than a national one, and billing it separately without checking is a routine denial
Our approach: We verify the specific plan's maternity policy before the first ultrasound is billed, and document the medical indication behind any study billed outside the package
Medicaid
Issue: State Medicaid programs define the maternity package differently — some separate delivery from antepartum care, others bundle everything into one payment, and managed-care plans within a state can differ again
Our approach: We maintain state-specific Medicaid OB billing matrices and bill according to each state's global vs unbundled payment structure
What We Handle
Maternity package billing (59400, 59510, 59610) and the discontinuity check
Per-patient tracking from the first prenatal encounter through the postpartum visit, with the record built to support whichever code is actually billable — the global package when one practice furnished all three components, the split codes when it did not.
Pregnancy-complication billing outside the package with modifier 25
Gestational diabetes, preeclampsia, preterm labor and hyperemesis encounters billed separately from the package with the supporting ICD-10 coding (O24, O14, O60, O21) and modifier 25 where the record documents a separately identifiable service. Antepartum-only 59425/59426 and postpartum-only 59430 for transferred-care patients.
GYN surgical coding (58570/58571 laparoscopic hysterectomy, 58558 hysteroscopy, 57454 colposcopy)
Laparoscopic, robotic and open gynecologic procedures with approach-specific code selection — including the 58570 against 58571 split, which turns on whether tube(s) and ovary(s) were removed — plus modifier 22 packaging for documented high-complexity cases and post-operative global period management.
Maternity ultrasound and antepartum testing (76801, 76811, 76816, 59025)
First-trimester, detailed fetal anatomic, follow-up growth and fetal non-stress testing billed against the documented medical indication, with the plan's own maternity and ultrasound policy pulled at eligibility rather than assumed from a national rule of thumb.
Well-woman, Pap, HPV and cell-free DNA screening authorization
99395–99397 preventive visit billing with Pap collection included in the visit, the separately billed cytology and HPV codes (88142 for thin-layer preparations, 87624/87625 for HPV), Medicare's own G0101, Q0091, G0123 and G0124 screening codes where the beneficiary has Medicare, and prior authorization for 81420 cell-free DNA screening where the plan requires it.
Cesarean and VBAC coding with modifier 22 high-complexity adjudication
Planned and unplanned cesarean coding (59510, 59514, 59618), trial-of-labor documentation, and modifier 22 packaging for placenta accreta, morbid obesity and extensive adhesion cases with comparison-statement operative-note language for individual review.
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Key OB/GYN CPT Codes
| CPT Code | Description | Medicare Amount CY2026 national, non-facility |
|---|---|---|
| 59400 | Routine obstetric care, vaginal delivery (maternity package) | $2,214 |
| 59510 | Routine obstetric care, cesarean delivery (maternity package) | $2,473 |
| 59025 | Fetal non-stress test | $50 |
| 76801 | Obstetric ultrasound, first trimester (under 14 weeks 0 days), single fetus | $117 |
| 58558 | Hysteroscopy, surgical, with endometrial sampling and/or polypectomy | $1,270 |
| 58571 | Laparoscopic total hysterectomy, uterus 250 g or less, with tube(s)/ovary(s) | $829 |
| 57454 | Colposcopy of the cervix with biopsy and endocervical curettage | $166 |
| 59899 | Unlisted obstetric procedure | Carrier-priced |
Amounts are the Medicare national unadjusted non-facility amounts for CY2026, computed from the published CMS relative value file. They are not what a commercial payer pays, and your locality adjustment moves them. A dash means Medicare publishes no amount for that code — because it is non-covered, bundled, or priced outside the fee schedule.
Why General Billing Teams Miss OB/GYN Issues
General billing staff handle dozens of specialties and rarely develop the depth needed for ob/gyn coding nuances. Here is what gets missed.
Modifier and bundling errors
Specialty-specific modifier rules and CCI edits are frequently overlooked by teams that do not work exclusively in ob/gyn.
Under-coding high-complexity visits
OB/GYN encounters often qualify for higher-level E/M codes, but generalist billers default to mid-level codes to avoid audit risk.
Missed payer-specific rules
Each payer has unique coverage and documentation requirements for ob/gyn procedures that general teams rarely memorize.
Slow denial turnaround
Without specialty knowledge, appeal letters lack the clinical specificity needed to overturn ob/gyn denials quickly.
“The maternity package is the largest single payment in this specialty, and it is decided by whether the pregnancy was reconciled — who furnished which component, what the other practice already billed, and which plan was in force when. Complications and high-risk monitoring get absorbed into the package when nobody is tracking that.”
MedPrecision Billing Team
OB/GYN Coding and Compliance Director
Transition Plan
Switching billing partners should not disrupt patient care or cash flow. Our transition plan is designed for zero downtime.
Discovery and Specialty Audit
We review your current ob/gyn billing workflows, denial patterns, and payer mix to build a tailored onboarding plan.
System Integration
We connect to your EHR and practice management system, configure specialty-specific code sets, and validate charge capture workflows.
Parallel Billing Period
We run billing in parallel with your current process for 2-4 weeks to verify accuracy before taking over completely.
Full Transition and Reporting
Once validated, we assume full billing responsibility with monthly reporting dashboards and a dedicated account manager.
OB/GYN Billing Terms
- Global OB Package
- A single payment covering routine antepartum care, the delivery and postpartum care when one practice furnishes all three. CPT defines the antepartum component as a visit schedule — monthly to 28 weeks, every two weeks to 36 weeks, weekly until delivery — rather than a fixed visit count. Services beyond that routine scope are separately billable.
- Antepartum Complication
- A condition arising during pregnancy that falls outside routine prenatal care and is separately billable from the global OB package. Examples include gestational diabetes management, preeclampsia monitoring, and preterm labor evaluation.
- Global Period (OB)
- The span the maternity package covers, from the first antepartum visit through delivery and postpartum care. On Medicare's physician fee schedule these codes carry a maternity global indicator (MMM), so the 10- and 90-day postoperative global-period rules do not apply to them; what falls inside the fee is set by the maternity package definition and the plan's policy.
- Unplanned Cesarean Section
- A C-section performed after labor has begun when vaginal delivery was the planned method. Coded differently from a planned C-section and may require modifier documentation if converting from a trial of labor.
- Fetal Non-Stress Test (NST)
- A monitoring procedure assessing fetal heart rate response to movement. Billed with 59025 and separately billable from the global OB package when medically indicated for high-risk pregnancies.
- Modifier 22 (Increased Procedural Services)
- Applied to surgical procedures when the work required substantially exceeds the typical procedure. Common in OB/GYN for complicated deliveries, extensive adhesion lysis, or procedures on patients with high BMI.
Last updated: 2026-09-17
Common Questions
Common questions about ob/gyn billing services.
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Request ReviewWhat is included in the global obstetric billing package?
It covers routine antepartum care, the delivery, and postpartum care when one practice furnishes all three. CPT describes the antepartum component as a schedule — monthly visits to 28 weeks, every two weeks to 36 weeks, weekly until delivery — rather than a fixed number of visits, so we do not treat “13 visits” as a rule; some payers state plainly that no specific count is required. We track each component and bill separately for what falls outside the package: documented pregnancy complications, antepartum testing such as the fetal non-stress test (59025), and medically indicated ultrasound. Note that Medicare's fee schedule assigns these codes a maternity global indicator, which is why the usual postoperative global-period rules do not apply to them — see the CMS relative value files, checked 17 September 2026.
How do you handle billing when a patient transfers care during pregnancy?
We reconcile the pregnancy before we bill it. If the patient had antepartum care elsewhere, the practice picking the care up must not bill the global package — it bills only the components it actually furnished. Antepartum-only billing is a single line for the whole pregnancy rather than a per-visit charge: 59425 for a total of four to six visits, 59426 for seven or more, and 59430 for postpartum care alone. One to three visits are reported as office visits instead. The same reconciliation runs when coverage changes mid-pregnancy: each plan pays only for care furnished while it was in force, so the package is unbundled along the coverage date rather than billed twice. We confirm with the other practice what has already been claimed before anything goes out.
Can you bill for an E/M visit on the same day as a gynecological procedure?
Yes, when the E/M visit involves a separately identifiable decision to perform the procedure or addresses an unrelated problem. We apply modifier 25 to the E/M code and ensure documentation supports the separate nature of both services.
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