OB/GYN Medical Billing Services Built to Protect Your Maternity and Gynecology Revenue
What Is OB/GYN Medical Billing?
OB/GYN medical billing is the process of submitting, tracking, and collecting on insurance claims for obstetric and gynecologic care, from a routine annual exam to a full nine-month global maternity package. It runs on two different billing systems under one specialty. Obstetrics bills mostly through bundled global codes tied to an entire pregnancy episode. Gynecology bills more like standard outpatient care, visit by visit, procedure by procedure. Mix up which rules apply to which patient and a practice either underbills a delivery or gets a claim denied for something that was never billable on its own.
That distinction matters more in 2026 than it has in years. The American College of Obstetricians and Gynecologists (ACOG) and CMS are actively moving payers away from the traditional global obstetric package toward itemized antepartum visit billing, and a full CPT code restructuring is scheduled for January 2027. We cover exactly what that means for your practice below.
As part of our comprehensive Medical Billing Services, our OB/GYN billing team handles eligibility, coding, claim submission, and A/R follow-up, so your providers can stay focused on patients instead of payer portals.
What Does OB/GYN Billing Include, From Eligibility to A/R Follow Up?
OB/GYN billing covers seven connected steps, and a miss at any one of them slows down payment or triggers a denial.
Eligibility & Benefits Check
Through our insurance verification services, we confirm maternity benefits, global package coverage, and gynecology procedure coverage before the visit happens. Newborn and mother coverage are separate eligibility checks and we run both.
Prior Authorization
High risk pregnancy monitoring, non invasive prenatal genetic testing, gynecologic oncology referrals, and several surgical procedures need prior authorization. We track payer specific rules so a missing auth never becomes a missing payment.
Obstetric & Gynecologic Coding
CPT, ICD-10, and modifier selection differ sharply between obstetric and gynecologic services. Our coders hold CPC certification from AAPC and apply the right rule set to the right encounter.
Claim Submission
Every claim runs through payer specific edits before it goes out the door, including the Medicaid rules that vary state by state for maternity coverage.
Payment Posting
Global package payments post differently than itemized payments. We reconcile both against the contracted rate so underpayments get flagged, not missed.
Denial Management
Global package unbundling is the single biggest denial driver in OB/GYN billing. Our denial management services team appeals these fast, with the documentation payers actually ask for.
A/R Follow Up & Episode Tracking
Maternity claims run on a longer cycle than a typical outpatient visit, sometimes spanning nine months from first prenatal visit to final postpartum payment. We track days in A/R against that full episode, not just a single date of service.
OB/GYN Coding : CPT, ICD-10, Modifiers, and Documentation
Coding accuracy is where OB/GYN billing either protects revenue or quietly loses it.
● CPT. Maternity-specific codes live in the 59000 to 59899 range. Gynecologic surgery lives in the 58000 series. E/M codes (99202 to 99499) apply outside the global bundle and, starting in 2026, increasingly inside it too as antepartum billing shifts toward itemized visits. For a deeper look at proper CPT documentation, see our CPT Code Documentation Essentials guide.
● ICD-10. Obstetric claims lean on O codes (pregnancy, childbirth, and the puerperium) and Z codes (encounter for supervision of pregnancy). Gynecologic claims commonly use N codes for conditions of the female reproductive system. See our ICD-10 vs CPT Code Differences breakdown for a fuller comparison.
● Modifiers. Modifier 22 flags significantly increased procedural work, common on complicated cesarean deliveries. Modifier 25 supports a separately identifiable E/M service on the same day as a procedure. Modifier 59 (or its more specific X modifiers) separates distinct procedural services. Modifier TH, new to widespread use in 2026, flags an antepartum E/M visit as maternity related.
● Documentation. Every one of those codes needs a documentation trail that supports it. Global package claims need documentation covering the full episode. Itemized antepartum claims need documentation for each individual visit. Screening procedures need medical necessity tied to a specific diagnosis, not a general wellness note.
Our team applies our full Medical Billing and Coding Services methodology to every OB/GYN claim, with coders who track payer-specific global maternity policies as they shift through 2026.
The global maternity package is shifting fast, and a missed antepartum E/M claim or a forgotten modifier TH can cost your practice real revenue during the transition.
How Does Dermatology Billing and Coding Work?
Dermatology billing and coding starts with the CPT code, not the claim form. Get the procedure code wrong (biopsy technique, lesion count, excision margin) and everything downstream (modifier selection, medical necessity linkage, reimbursement amount) breaks.
Maternity-specific codes live in the 59000 to 59899 range, while gynecologic surgery lives in the 58000 series. E/M codes (99202 to 99499) apply outside the global bundle and, starting in 2026, increasingly inside it too as antepartum billing shifts toward itemized visits. For a deeper look at proper documentation, see our CPT Code Documentation Essentials guide.
Obstetric claims lean heavily on O codes (pregnancy, childbirth, and the puerperium) and Z codes (encounter for supervision of pregnancy). Gynecologic claims commonly use N codes for conditions of the female reproductive system. See our ICD-10 vs CPT Code Differences breakdown for a fuller comparison.
Modifier 22 flags significantly increased procedural work, common on complicated cesarean deliveries. Modifier 25 supports a separately identifiable E/M service on the same day as a procedure. Modifier 59 (or its more specific X modifiers) separates distinct procedural services. Modifier TH, new to widespread use in 2026, flags an antepartum E/M visit as maternity related.
Every code needs a robust documentation trail to back it up. Global package claims need documentation covering the full episode, while itemized antepartum claims need documentation for each individual visit. Screening procedures require medical necessity tied to a specific diagnosis rather than a general wellness note. Our team applies our full Medical Billing and Coding Services methodology to every OB/GYN claim, with expert coders who track payer-specific global maternity policies as they shift through 2026.
A routine pregnancy includes roughly 13 antepartum visits. Under the global package, none of these bill separately. They're bundled into the final delivery code.
The four core global delivery codes are CPT 59400 (vaginal delivery), 59510 (cesarean delivery), 59610 (vaginal birth after cesarean), and 59618 (attempted VBAC converting to cesarean). Each carries a 90 day global period from the delivery date, defined under CMS global surgery and maternity payment rules.
The six week postpartum visit is included in the global package. Billing CPT 59430 separately during that 90 day window is a common, avoidable denial.
If your practice provided every stage of care for one pregnancy, the global code is the correct claim. Period. Complications, unrelated illness treated during pregnancy, and services outside the routine definition get billed separately using standard E/M codes (the 99xxx series), often with modifier 22 attached when documentation supports significantly increased work.
Here's the part every OB/GYN practice manager needs on their radar right now. ACOG recommends that health plans begin transitioning away from the bundled global obstetric payment model, starting no later than September 1, 2026, by allowing individual E/M codes for antepartum visits without prior authorization limits. ACOG's guidance also calls for appending HCPCS modifier TH to antepartum E/M claims to flag them as maternity related. That's a bridge to a bigger change: the AMA CPT Editorial Panel has already approved a full restructuring of obstetric codes, a new 59XX1 through 59X12 series, effective January 1, 2027, that will replace much of today's global package structure.
What Does OB/GYN Revenue Cycle Management Actually Look Like?
OB/GYN RCM manages the full financial life of a claim, from the moment a patient books an appointment to the moment the final payment posts, and for obstetric claims, that life cycle can stretch across an entire pregnancy.
We’ve processed more than 100,000 claims across 50 plus specialties, and OB/GYN carries its own RCM wrinkle most general billing teams miss: a single patient can generate one enormous bundled claim and a dozen small gynecologic claims in the same calendar year, and each needs to be tracked against a different global period clock.
You get weekly reports showing denial rate, days in A/R, and global package completion status, broken out separately from routine gynecologic visit collections, so you can see exactly where revenue is moving and where it’s stuck.
What Results Can Dermatology Practices Expect?
Practices that move their dermatology billing to Medicotech typically see four things change within the first 90 days: cleaner claims going out the door, fewer coding related denials coming back, faster payment posting, and clearer reporting on where the practice actually stands financially.
Precision Revenue Performance for OB/GYN Practices
Our OB/GYN clients protect their revenue margins by eliminating the top billing traps in women's health. By aligning every claim with shifting 2026 antepartum guidelines, managing multi-policy eligibility, and applying specialty-trained coding oversight, we ensure complex maternity and gynecological episodes are reimbursed accurately the first time.
Global package unbundling errors—such as billing antepartum visits separately when they belong inside the bundle or failing to trigger separate E/M billing for complications—represent the single biggest denial driver in obstetric billing, especially as the 2026 transition rolls out unevenly across payers.
Modifiers 22, 25, and TH demand precise documentation support to avoid instant denials. Furthermore, treating mother and newborn coverage as a single policy creates critical eligibility gaps, just as high-risk genetic testing and fetal medicine referrals require proactive prior authorization tracking.
General billing teams can handle routine visits, but global maternity coding requires specialized expertise. When trained OB/GYN billers leave, vital knowledge departs with them—making dedicated specialty support essential to protect your practice against ongoing revenue leakage.
How Is Gynecology Billing Different From Obstetrics Billing?
Gynecology billing looks a lot more like standard outpatient billing. There’s no nine month bundle and no global period tying one visit to the next.
| Aspect | Obstetrics Billing | Gynecology Billing |
|---|---|---|
| Billing model | Bundled global package (one code, one episode) | Fee for service, visit by visit |
| Typical CPT range | 59000 to 59899, plus 99xxx for excluded services | 99202 to 99215 (E/M), 58000 series (surgery) |
| Documentation window | Up to 9 months per pregnancy episode | Single encounter or single procedure |
| Top denial driver | Global package unbundling, missing modifier TH | Missing medical necessity for screening or procedure |
| 2026 to 2027 change to watch | ACOG antepartum E/M transition, 2027 CPT restructuring | No major structural change expected |
Seamless Integration & Specialized OB/GYN Revenue Expertise
Built specifically to support women's health practices without disrupting your clinical workflows or forcing costly software migrations.
Supported EHR Systems
Medicotech integrates with the EHR your practice already runs. No forced migration, no disruption to your existing workflow, and no retraining your front desk on new software.
We work inside athenahealth, NextGen Healthcare, Epic, Greenway Health, eClinicalWorks, Kareo (Tebra), and AdvancedMD, among others—several of which carry OB/GYN specific charting templates for antepartum flow sheets and delivery summaries. If your practice runs something else, tell us; most OB/GYN practice management systems export in formats our team already knows.
Who We Serve
- Solo and small OB/GYN practices needing billing expertise without the overhead of an in-house team.
- Multi-provider women's health groups managing high claim volume across multiple providers and locations.
- Maternal fetal medicine & high-risk obstetrics practices where prior authorization tracking and complex modifier use are constant.
- Gynecologic oncology & urogynecology subspecialists requiring precise surgical global period and oncology-specific documentation.
Why Choose Medicotech for OB/GYN Medical Billing
Most OB/GYN practices spend their vendor vetting time asking about EHR integrations and barely ask how a billing partner handles global package unbundling—which is exactly where OB/GYN revenue actually disappears. We think that's backward, and we built our OB/GYN service around the part that gets overlooked.
Your practice delivers babies and treats patients through decades of care, and handles some of the most complex coding in medicine. Your billing partner should match that complexity.
Frequently Asked Questions
What is OB/GYN medical billing?
OB/GYN medical billing is the process of coding, submitting, and collecting on insurance claims for obstetric and gynecologic care. It combines bundled global maternity billing with standard fee for service gynecology billing under one specialty, each governed by different CPT rules.
What is included in the OB/GYN global maternity package?
The global maternity package bundles routine antepartum care (about 13 visits), the delivery itself, and the six week postpartum visit into one CPT code, such as 59400 for a vaginal delivery. Complications and unrelated illness bill separately.
What is CPT 59400 used for?
CPT 59400 covers routine obstetric care for a vaginal delivery, including antepartum care, the delivery, and postpartum care, billed as one bundled global code with a 90 day global period from the delivery date.
Is global maternity billing changing in 2026 or 2027?
Yes. ACOG recommends payers begin shifting to itemized E/M billing for antepartum visits, using modifier TH, no later than September 1, 2026. A full CPT restructuring of obstetric codes takes effect January 1, 2027, replacing much of the current global package model.
What is modifier TH in obstetric billing?
Modifier TH is a HCPCS modifier appended to an E/M code to identify the visit as maternity related, part of ACOG’s recommended transition away from bundled global obstetric billing toward itemized antepartum visit billing.
How is gynecology billing different from obstetrics billing?
Gynecology billing is fee for service, with each office visit, procedure, or surgery billed and paid individually. Obstetrics billing is mostly bundled under global codes covering an entire pregnancy episode. The two use different CPT ranges and different denial patterns.
What ICD-10 codes are common in OB/GYN billing?
Obstetric claims commonly use O codes for pregnancy, childbirth, and the puerperium, along with Z codes for pregnancy supervision encounters. Gynecologic claims typically use N codes for conditions of the female reproductive system.
How much does outsourced OB/GYN medical billing cost?
Medicotech charges a percentage of collections, typically 4 to 8 percent depending on specialty and claim volume, with no setup fees and no long term contract. A free billing audit before engagement shows your practice the expected cost against your current claim volume.
Which EHR systems work with your OB/GYN billing services?
We work inside athenahealth, NextGen Healthcare, Epic, Greenway Health, eClinicalWorks, Kareo (Tebra), and AdvancedMD, without requiring your practice to migrate systems.
Do you handle prior authorization for high risk pregnancy or gynecologic oncology referrals?
Yes. Our authorization team tracks payer specific requirements for maternal fetal medicine referrals, non invasive prenatal genetic testing, and gynecologic oncology consults, so approvals happen before the appointment, not after a denial.