An OB/GYN practice we support had a patient change employers at 31 weeks. Her old plan ended on the last day of the month, her new plan started the next day, and she delivered five weeks later. The biller submitted 59400, the full global vaginal delivery code, to the new plan. It denied for dates of service outside the coverage period, because the claim listed the first prenatal visit as the start date. Nine antepartum visits belonged to a payer that would never see a claim, and the practice was about to write off two months of work.
OB global package billing is one of the few areas of professional coding where a single code covers care delivered over eight or nine months. That is efficient when nothing changes. Insurance changes, patients move, physicians leave groups, and pregnancies become complicated, and each of those events breaks the package into pieces that have to be billed separately and correctly. Well-woman visits sit next to this work in the same practice and carry their own set of rules, so we cover both here.
A glossary line before we start. The global obstetric package is the CPT convention that bundles routine antepartum (prenatal) care, the delivery, and routine postpartum care into one code. "Routine" is the load-bearing word. Anything that is not routine is billed on its own.
Key takeaways
- The global codes 59400, 59510, 59610 and 59618 include roughly 13 routine prenatal visits, the delivery and about six weeks of postpartum care, and nothing else.
- When one practice or one payer does not cover the whole pregnancy, use the antepartum-only codes 59425 (4 to 6 visits) and 59426 (7 or more), and the delivery-only or delivery-plus-postpartum codes.
- Ultrasounds, non-stress tests, labs, the pregnancy confirmation visit and visits for complications are outside the package and are billed with their own codes and diagnoses.
- Well-woman visits are preventive E/M codes for commercial patients and G0101 plus Q0091 for Medicare, and a same-day problem needs its own E/M with modifier 25.
- Payer rules vary, especially Medicaid; some states require per-visit billing instead of the global, so check before you set the practice default.
What the OB global package includes
CPT describes the global package as routine antepartum care, delivery, and postpartum care. Routine antepartum care means the initial and subsequent history, physical exams, recording of weight, blood pressure and fetal heart tones, routine urine dipsticks, and the visit schedule that runs roughly monthly to 28 weeks, every two weeks to 36 weeks, and weekly until delivery. That works out to about 13 visits in an uncomplicated pregnancy. Delivery includes admission, the history and physical on admission, management of uncomplicated labor, and the vaginal or cesarean delivery. Postpartum care covers the hospital and office visits after delivery through about six weeks.
The four global codes are 59400 for routine vaginal delivery, 59510 for cesarean, 59610 for vaginal delivery after a previous cesarean, and 59618 for an attempted vaginal birth after cesarean that ends in a cesarean. Choose based on what happened at delivery and the patient's history, not on what was planned. A patient with a prior cesarean who delivers vaginally is 59610 even if nobody expected it.
What is not included is the longer list, and it is where practices lose money. The visit that confirms the pregnancy, before the OB record is opened, is a problem-oriented E/M visit. Ultrasounds (76801 and 76802 for the first trimester, 76805 for the detailed anatomy scan, 76815 for a limited study, 76816 for follow-up, 76817 for transvaginal) are separately billable. Non-stress tests are 59025. Laboratory work is billed by whoever runs it. Amniocentesis, cerclage, external cephalic version (59412) and a postpartum tubal ligation are all separate procedures. Visits for complications, such as gestational diabetes management, hypertension or preterm labor evaluation, are E/M visits with the complication diagnosis, not the Z34 supervision code.
The antepartum-only codes and how to count visits
When the practice will not be delivering the patient, or the payer changes, the antepartum work is billed on its own. The rule is based on the visit count. One to three antepartum visits are billed as individual E/M codes at the level documented. Four to six visits are billed together as 59425. Seven or more are billed as 59426. Each of those two codes is billed once, with one unit, on a single claim after the last visit, with the date range covering the first through last antepartum visit.
Delivery without the antepartum portion is 59409 (vaginal), 59514 (cesarean), 59612 (VBAC) or 59620 (attempted VBAC ending in cesarean). Delivery with postpartum care but without antepartum care is 59410, 59515, 59614 or 59622. Postpartum care alone is 59430.
| Situation | What you bill | Notes |
|---|---|---|
| Whole pregnancy, one payer, one group, vaginal delivery | 59400 | One claim after postpartum care ends; date of service is usually the delivery date, but check payer policy |
| Patient transfers out after 5 prenatal visits | 59425 | One unit; new practice bills its own portion |
| Patient transfers in at 34 weeks, 3 visits, vaginal delivery, postpartum | 3 E/M visits plus 59410 | Under four visits means individual E/M codes, not 59425 |
| Insurance changes at 31 weeks after 9 visits; 4 more visits, cesarean, postpartum | Payer A: 59426. Payer B: 59425 plus 59515 | Each payer sees only the care delivered during its coverage |
| Twins, vaginal delivery of both | 59400 plus 59409 with modifier 59 or per payer rule | Many payers want the second delivery on its own line; some pay 59400 with modifier 22 instead |
Back to our opening patient. The fix was two claims. Payer A received 59426 for the nine visits with dates of service spanning the first through ninth visit. Payer B received 59425 for the four visits under its coverage and 59410 for the delivery and postpartum care. Both paid. The lesson we took: when the front desk records an insurance change on a pregnant patient, it should flag the chart so the biller knows a split is coming before the delivery claim goes out.
Transfer of care within and across groups
Physicians in the same group practice, billing under the same tax identification number, are treated as one provider for the global package. If Dr. A sees the patient for prenatal care and Dr. B, a partner, delivers, the group bills one global code. The problem cases are physicians in different groups, a patient who moves to another city, a physician who leaves the practice mid-pregnancy and takes patients along, and a hospitalist or laborist model where the delivering physician is employed by the hospital.
In each of those, the antepartum practice bills 59425 or 59426 based on its visit count, and the delivering party bills delivery only or delivery plus postpartum, depending on who provides the postpartum visits. Communication matters more than coding. We ask practices to send a short transfer summary that states the visit count and dates, so the receiving practice does not accidentally bill a global that overlaps.
Diagnosis coding for the pregnancy
Routine prenatal visits carry a Z34 code: Z34.01, Z34.02 or Z34.03 for a first pregnancy by trimester, Z34.81 to Z34.83 for other normal pregnancies, or Z34.90 to Z34.93 when the type is unspecified. High-risk supervision uses an O09 code, such as O09.523 for supervision of an elderly multigravida in the third trimester. The delivery claim for an uncomplicated full-term vaginal birth uses O80, with Z37.0 for a single live birth as the outcome code. Every pregnancy claim also needs a Z3A weeks-of-gestation code, such as Z3A.39 for 39 weeks, except on the routine postpartum visit, which is Z39.2.
The mistake we see most often is a Z34 code on a visit for a complication. If the patient came in for elevated blood pressure at 32 weeks, the diagnosis is the hypertension code from chapter 15 (for example O13.3 for gestational hypertension in the third trimester), and the visit is a separately billable E/M outside the package. A Z34 code on that claim tells the payer the visit was routine, which means it was already paid inside the global, which means the E/M denies as bundled.
Well-woman visits: preventive codes and the Medicare carve-out
A well-woman visit is an annual preventive exam. For commercial patients it is billed with the preventive medicine E/M codes: 99385, 99386 or 99387 for a new patient aged 18 to 39, 40 to 64 or 65 and over, and 99395, 99396 or 99397 for an established patient in the same age bands. The diagnosis is Z01.419 for a gynecological exam without abnormal findings or Z01.411 with abnormal findings, with Z12.4 added when a cervical screening specimen is collected. Under the Affordable Care Act, most commercial plans cover the well-woman visit with no patient cost sharing, so a copay collected at check-in usually has to be refunded.
Medicare does not pay the 993 series preventive codes. Instead, Medicare covers a screening pelvic and clinical breast exam as G0101 and collection of a Pap specimen as Q0091, once every 24 months, or every 12 months for a patient at high risk. The Annual Wellness Visit (G0438 or G0439) is a separate service with its own requirements and can be billed on the same day.
When the patient raises a problem during the well-woman visit, such as abnormal bleeding that leads to a workup, the problem portion is billed as a separate office E/M with modifier 25, at the level supported by the problem-oriented documentation alone. The note should show two distinct pieces of work. Our medical coding audits find this split is either never done, leaving money on the table, or done for every visit with a trivial complaint, which invites payer review. Neither habit is right.
Questions we hear
When do we submit the global claim?
After the postpartum care is complete, or when the payer's policy allows an earlier submission. Most commercial payers accept the global claim after delivery with the delivery date as the date of service. Some Medicaid programs require the actual postpartum visit to have occurred. Check the payer manual and set a default in your billing system so claims do not go out early and deny.
Our state Medicaid plan says it does not accept global codes. What do we do?
Bill per visit, using the E/M code each visit supports, plus the delivery-only code. Several state Medicaid programs and their managed care plans work this way so they can track prenatal visit counts. It is more work and usually pays less, and it is not optional. Build a payer-specific rule in the practice management system so the OB record produces the right claim type.
The physician documented a "prenatal visit" for a patient with hyperemesis who needed IV fluids. How is that billed?
The IV hydration (96360 and 96361 if it ran over an hour) and the E/M visit for the hyperemesis, with a diagnosis from O21, are billed separately from the global. The visit is not routine antepartum care. If the note only says "prenatal visit" you will need the physician to make clear that the visit addressed the complication.
What to do this week
- Pull every 59400, 59510, 59610 and 59618 claim from the past year and check each patient's eligibility history for a coverage change during the pregnancy.
- Count antepartum visits on your transferred-in and transferred-out patients and confirm 59425, 59426 or individual E/M codes were used correctly.
- Review the last 20 prenatal visits coded with a Z34 diagnosis and confirm none of them addressed a complication that should have been billed separately.
- Write a front desk flag for insurance changes on pregnant patients so the biller knows a split claim is coming.
- Check your top three commercial payers and your state Medicaid plan for their global versus per-visit policy and record it in the payer matrix. Our RCM audit service can run this review for you if the team is stretched.
