Specialty
OB-GYN billing services
OB-GYN billing services carry two different jobs in one practice: a maternity package that pays once at delivery for months of visits, and a gynecology side of preventive exams, procedures and surgeries with their own frequency limits and global periods.
See where claims are getting stuck. No patient data needed.
Remitwright gives OB-GYN groups a dedicated biller who tracks every pregnancy from the first prenatal visit to the postpartum check, splits the package when a patient changes plans or providers, bills the complication visits the package does not cover, and keeps the Medicare and commercial screening intervals so a Pap, a mammogram order or a bone density test is not denied for frequency.
OB-GYN billing is one of Remitwright's specialty billing services, each set out with its own code families, denial reasons and payer rules.
Last reviewed by the Remitwright billing team. Editorial policy
- 57452-57461
- 58150-58573
- 59025
Denials
Why OB-GYN claims get denied
The reasons that come up most on OB-GYN remittances, with the usual cause and the fix. Code explanations are our own; the official list is maintained by X12.
| Code | Reason | Usual cause | The fix |
|---|---|---|---|
| CO-97 | Bundled, not separately payable | Prenatal visits, routine urinalysis, fetal monitoring in labor, placenta delivery or an uncomplicated postpartum visit billed in addition to a package or delivery code | Package contents mapped per payer, the prenatal flowsheet held as non-billable until delivery, and complication visits coded separately with their own notes |
| CO-18 | Already billed; treated as a duplicate | Visits billed as E/M during the pregnancy and then the complete package billed at delivery covering the same dates, or two physicians in the group each billing the delivery | One maternity episode per patient with one billing provider for the package, and any itemized visits reversed before the package goes out |
| PR-27 | Plan ended before the date of service | The patient's plan ended during the pregnancy and the full package was billed to a plan that was no longer active on the delivery date | Eligibility rechecked monthly through the pregnancy; prenatal-only codes with the date range to the first plan, delivery and postpartum codes to the second |
| CO-119 | Benefit maximum reached | A Medicare screening Pap and pelvic exam billed inside 24 months without a documented high-risk reason, or a screening mammogram ordered inside the yearly window | Last screening dates and the high-risk diagnosis checked before the visit, with the patient told when a test will be hers to pay |
| CO-197 | Authorization absent | Hysterectomy, pelvic surgery, detailed or repeat obstetric ultrasound, or genetic testing performed without the plan's authorization or pregnancy notification | An authorization matrix per plan listing which procedures and how many scans need one, with the pregnancy notification sent at the first prenatal visit |
| CO-4 | Procedure inconsistent with the modifier | Modifier 22 without the operative record, 25 missing on a complication visit, or 57 on the visit before a minor procedure | Modifier edits per code family before release, and documentation attached on first submission where the payer requires it |
| CO-16 | Claim lacks information | Package code sent without the date span the payer wants, more than one unit on a global code, or a Medicaid sterilization claim without the signed federal consent form | Payer-specific claim rules for maternity codes in the scrubber, and the consent form captured at scheduling rather than on the day of surgery |
Codes
Common OB-GYN codes and modifiers
Code families by number with our own one-line explanations. CPT descriptors belong to the AMA and are not reproduced here.
| Codes | What the family covers |
|---|---|
| 57452-57461 | Colposcopy with and without biopsy, endocervical curettage and loop excision. The diagnostic look is folded into a treatment done at the same session. |
| 58150-58573 | Hysterectomy by approach, abdominal, vaginal and laparoscopic, carrying the 90-day global and the modifier rules that go with major surgery. |
| 58300, 58301, 11981-11983, J7296-J7307 | Insertion and removal of intrauterine devices and contraceptive implants, with the device itself billed as a separate supply line. |
| 59025, 76801-76828 | Fetal non-stress testing and obstetric ultrasound, from the first-trimester scan to detailed anatomy, follow-up and biophysical profile. Outside the maternity package when the indication is documented. |
| 59400, 59510, 59610, 59618 | Complete maternity packages for a vaginal or cesarean birth, with and without a prior cesarean. One unit on one claim at delivery, covering the routine prenatal visits, the delivery and the postpartum period. |
| 59409, 59410, 59514, 59515, 59612, 59614, 59620, 59622 | Delivery only, and delivery with postpartum care, for the group that did not provide the prenatal care. |
| 59425, 59426, 59430 | Prenatal care alone, split by how many visits the group provided, and postpartum care alone. These are the codes for a patient who transferred in, transferred out or changed plans during the pregnancy. |
| 99202-99215 | Problem visits for gynecologic complaints and for pregnancy complications that fall outside the routine prenatal flowsheet. |
| 99381-99397, G0101, Q0091 | Preventive visits by age and, for Medicare, the pelvic and breast exam and the Pap specimen collection that Medicare pays on its own screening schedule. |
Modifiers that matter
- 22
- On the delivery or package code when a third- or fourth-degree laceration was repaired, with the operative note attached, since first- and second-degree repairs are part of the delivery payment.
- 25
- On an E/M for a pregnancy complication beyond the routine visit count, reported after delivery, and on a problem visit done with a preventive exam or a minor procedure on the same day.
- 57
- On the visit where the decision for a 90-day surgery such as a hysterectomy is made, the day before or the day of surgery. Never on a visit before a minor procedure.
- 58
- Staged or related procedure within a global period, such as a loop excision that follows a diagnostic colposcopy once the biopsy result is back.
- 24 and 79
- Unrelated E/M and unrelated procedure by the same surgeon during a post-operative period, each with its own documentation; 79 also starts a new global period.
- 33
- Preventive service without cost sharing under the Affordable Care Act for contraception, sterilization counseling and well-woman services on commercial claims, when the code does not already signal screening.
- FP
- Family planning service, required by some state Medicaid programs on contraception claims. Which claims need it is set by the state.
Payers
Payer notes
- Commercial (UnitedHealthcare)The complete maternity codes are paid when one group provides all prenatal, delivery and postpartum care. The package includes about 13 routine prenatal visits, routine urinalysis, the admission history and physical, inpatient E/M within 24 hours of delivery, the delivery with repair of first- and second-degree lacerations, and routine outpatient visits within six weeks of delivery. Prenatal care alone is reported with 59425 for 4 to 6 visits, 59426 for 7 or more, and itemized E/M codes for 1 to 3.1
- Commercial (UnitedHealthcare)Visits for complications or high-risk monitoring beyond the typical 13 are reported after delivery with modifier 25. Extra visits that monitored a problem which never developed are not reported at all. Third- or fourth-degree laceration repair is shown with modifier 22 and the operative record.1
- Medicare and plans that apply NCCITotal obstetric packages do not include ultrasound, amniocentesis, genetic screening, visits for unrelated conditions or extra visits for high-risk conditions. Fetal monitoring during labor, episiotomy and placenta delivery are part of every delivery code, and urinalysis is part of prenatal care. A colposcopy done to confirm a lesion before a surgical procedure is not separately reportable, while a diagnostic colposcopy that leads to a non-colposcopic procedure is reported with modifier 58 on that procedure.2
- MedicareScreening Pap tests and pelvic exams are covered every 24 months, every 12 months for women at high risk or with an abnormal Pap in the past 36 months, and an HPV test with the Pap every 5 years between ages 30 and 65, with no patient cost when the provider accepts assignment.3
- MedicareOne baseline mammogram between ages 35 and 39, a screening mammogram every 12 months from age 40, and diagnostic mammograms more often when medically necessary with 20 percent coinsurance after the Part B deductible.4
- MedicareBone density testing every 24 months, or more often when medically necessary, for an estrogen-deficient woman at clinical risk for osteoporosis and for the other listed conditions, with no patient cost under assignment.5
- Marketplace and ACA-compliant commercial plansWell-woman visits, FDA-approved contraception, sterilization and counseling, mammography every 1 to 2 years from age 40, Pap tests from 21 to 65, gestational diabetes screening from 24 weeks or earlier for high-risk patients, and breastfeeding support and supplies are covered without copayment or coinsurance in network.6
- MedicaidFederal law requires pregnancy-related coverage through 60 days postpartum. The American Rescue Plan Act gave states the option to extend it to 12 months, made permanent by the Consolidated Appropriations Act 2023, so whether a late postpartum visit is covered depends on the state and the date.7
- Medicare global surgeryHysterectomy and other major gynecologic surgery carry a 90-day global that counts the day before surgery, the surgery day and the 90 days after, including routine postoperative visits and complications that do not return the patient to the operating room. The decision visit is paid with modifier 57, and unrelated visits or procedures in the period are paid with 24 or 79.8
Authorizations
Routine prenatal care rarely needs authorization, but most plans want a pregnancy notification early in the first trimester and some Medicaid managed care plans tie prenatal payment to it. Authorization is usual for hysterectomy and other pelvic surgery, for detailed or repeat obstetric ultrasounds beyond the plan's allowance, for maternal-fetal medicine referrals and genetic testing, and for inpatient admissions outside labor. Medicaid sterilization claims need the signed federal consent form with the waiting period your state applies. Your biller sends the notification at the first visit, keeps the authorization matrix per plan, and rechecks eligibility every month because Medicaid coverage can change during and after the pregnancy.
Documentation traps
- A prenatal flowsheet with no dated entry per visit, so the visit count cannot be proven when the patient changes plans and the claim needs an antepartum-only code
- Complication visits written into the routine flowsheet rather than as separate notes, which leaves nothing to support modifier 25 when they are billed after delivery
- Delivery notes that do not state the laceration degree, so a third- or fourth-degree repair is paid as part of the delivery
- Ultrasound reports without the indication, the findings and a signed interpretation, or images not retained, which the payer asks for on review
- Medicare screening Pap and pelvic exam notes without the high-risk factor or the abnormal history, so the annual claim denies as too frequent
- Sterilization consent forms signed on the day of surgery or missing a signature, which Medicaid rejects regardless of the clinical note
What a specialist checks
Specialist or generalist for OB-GYN billing?
A generalist biller can enter an OB-GYN claim. Whether it pays turns on three things specific to OB-GYN billing, and a specialty-aware biller checks each one.
Code families
Each family billed with what the chart has to show for it.
- 57452-57461
- 58150-58573
- 58300, 58301, 11981-11983, J7296-J7307
Modifiers
Applied only where the note supports them, line by line.
- 22
- 25
- 57
If you are moving from another billing company or an in-house biller, switching billing companies follows a plan: the old and new processes run side by side until the new one is proven, and every login and every OB-GYN claim stays in your name.
What we handle
What we handle for OB-GYN practices
- Eligibility verificationCoverage and benefits checked before visits
- Prior authorizationAuths requested, tracked, attached to claims
- Charge entryEvery encounter captured, nothing left unbilled
- Claim submissionScrubbed, submitted and tracked to acceptance
- Denial managementEvery denial read, worked and appealed
- A/R follow-upUnpaid claims chased before filing limits
A dedicated biller with named cover, working inside your system and reporting to you on one written page. How it works sets out the five stages.
Software
Systems OB-GYN practices usually run
Your biller works inside your system as a user you create. All the systems we work in.
Questions
Questions about OB-GYN billing
What is included in the global maternity package?
The routine prenatal visits, the admission and delivery, repair of first- and second-degree lacerations, uncomplicated hospital visits after delivery, and the routine postpartum visits within the payer's postpartum window. Ultrasounds, non-stress tests, lab work other than routine urinalysis, visits for problems unrelated to the pregnancy, and complication visits beyond the routine count are outside it and billed on their own with the diagnosis that supports them.
The patient changed insurance during her pregnancy. How do we bill?
Split the episode by payer. The first plan gets an antepartum-only code chosen by the number of visits it covered, with the date range on the claim, or itemized E/M codes when the count is small. The second plan gets the delivery code, or delivery with postpartum, plus any prenatal visits it covered as antepartum-only. Billing the full package to either plan brings a termination denial from one and a duplicate from the other.
Can we bill extra visits for a high-risk pregnancy?
Yes, once the patient has delivered and the count is known. Visits beyond the routine number that addressed a current complication are billed as E/M with modifier 25 and the complication diagnosis, each with its own note. Visits that watched for a problem that never developed are not billed. Your biller holds the complication visits in the episode and releases them with the delivery claim.
How often does Medicare pay for a Pap and pelvic exam?
Every 24 months for most women, and every 12 months when the record documents a high-risk factor or an abnormal Pap within the past 36 months. An HPV test with the Pap is covered every 5 years between 30 and 65. The claim carries Medicare's own exam and specimen collection codes rather than the preventive visit codes, and the high-risk diagnosis has to be on it for the annual schedule to apply.
How are twins billed?
The package and delivery codes cover a single baby. Each payer's maternity policy has its own section on multiple gestation that says how the second delivery is reported, and plans do not agree with each other. Your biller keeps the rule per payer, bills the second delivery the way that plan's policy reads, and attaches the delivery note when the plan wants records on first submission.
Does Medicaid coverage end after the baby is born?
Federal law requires pregnancy-related coverage through 60 days postpartum, and states have the option, now permanent, to extend it to 12 months. Many have, some have not, and a patient can also move to another eligibility group or lose coverage altogether. Your biller rechecks eligibility before every postpartum and follow-up visit instead of assuming the plan on file is still active.
Why did the colposcopy deny when we did a loop excision at the same visit?
Because a colposcopy done to confirm the lesion or look at the field before a procedure is part of that procedure under the NCCI rules most payers apply. When a diagnostic colposcopy led to the decision to treat at a later session, the treatment code carries modifier 58 and the colposcopy stands. The sequence and the reason for treating have to be in the notes for either claim to hold.
What do you need from an OB-GYN practice to start?
A signed BAA, a user for your biller in your EHR or practice management system and clearinghouse, your payer contracts, your open maternity episodes with first visit dates and expected delivery dates, and each clinician's credentialing status with each plan. Bring an aging report and a denial report to the review if you have them.
Next step
See where your OB-GYN claims are getting stuck.
Three quick questions. No patient data. A billing specialist reads every request and replies in writing.
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- A written reply from a biller, not a sales deck
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- A billing specialist reads your answers and replies by email.
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While you wait: see the sample weekly report or read how switching works. You can also download the sample weekly report (PDF).