Most Commonly used OBGYN CPT Codes + Modifiers 2026

Incorrect OBGYN CPT codes cost practices 3–5% of net revenue annually. One wrong modifier, one missed documentation detail, one incorrect global billing choice, these aren’t small mistakes. They’re costly denials, weeks lost in AR, and preventable revenue loss. 

OB/GYN coding spans the full spectrum of women’s healthcare, from well-woman exams to pregnancy, delivery, surgery, and fertility care. In 2026, 400+ CPT code modifications affect OBGYN billing, and 2027’s global OB code changes are coming faster than you think. Each CPT code carries weight in reimbursement, compliance, and revenue. Accuracy is the difference between smooth claims and weeks lost in AR.

As payer scrutiny increases in 2026, OBGYN billing teams are facing greater attention around global obstetric packages, ultrasound medical necessity, modifier usage, fertility services, and preventive care documentation. Understanding the most commonly used OBGYN CPT codes is essential for maintaining clean claims and protecting reimbursement. 

Key OBGYN Billing Updates for 2026

OBGYN billing teams are navigating several coding, reimbursement, and compliance changes in 2026. While many core CPT codes remain unchanged, payer policies, documentation expectations, and upcoming maternity coding reforms make it essential to stay current.

400+ CPT code revisions effective January 1, 2026

The 2026 CPT code set includes hundreds of updates across specialties, reinforcing the need for annual coding reviews and payer policy validation.

Global maternity care codes remain in place for now

CPT codes 59425 and 59426 continue to be valid throughout 2026. However, these codes are scheduled for retirement in 2027 as the industry transitions toward a new maternity care coding framework.

Preparing for the transition away from traditional global OB billing

Industry organizations, including ACOG, continue providing guidance on the upcoming shift from bundled maternity coding to separate reporting for antepartum visits, labor management, delivery services, and postpartum care beginning in 2027.

Modifier TH gains importance

Many payers increasingly recommend the use of Modifier TH (Obstetrical Treatment Services) alongside maternity-related E/M services (99202–99499) to improve claim identification and support future coding transitions.

2026 ICD-10-CM updates impact obstetric reporting

New diagnosis codes and classification refinements affecting pregnancy complications, maternal conditions, and cardiovascular disorders during pregnancy require careful review to ensure diagnosis-to-procedure alignment.

Medicare reimbursement updates

The 2026 Medicare Physician Fee Schedule includes conversion factors of approximately:

• $33.57 for qualifying APM participants
• $33.40 for non-qualifying providers

Practices should also monitor the ongoing 2.5% efficiency adjustment, which may influence reimbursement for commonly reported procedural services.

Why These Updates Matter

Many of the biggest reimbursement risks in OBGYN billing do not come from selecting the wrong CPT code. They stem from outdated documentation practices, incorrect global package reporting, modifier misuse, and failure to adapt to evolving payer requirements.

Understanding these changes early helps practices reduce denials, improve coding accuracy, and prepare for the significant maternity care coding transition expected in 2027.

Preventive and Screening OBGYN CPT Codes

Preventive visits and screenings are the entry point for many OB/GYN encounters. These codes track everything from Pap smears to pelvic ultrasounds, and accuracy here sets the tone for a claim’s success. After preventive care establishes baseline health, pregnancy coding introduces unique bundled payment structures that require careful documentation.

Office and Preventive Visits

CPT 99202–99215: Problem-Oriented Office Visits

Used for evaluation and management services involving gynecologic concerns such as abnormal uterine bleeding, pelvic pain, menopause symptoms, infections, contraception management, or follow-up care. Code selection is based on medical decision-making complexity or total provider time documented during the encounter.

CPT 99381–99397: Preventive Visits

Reported for annual well-woman examinations that include age-appropriate screening, counseling, risk assessment, preventive education, and health maintenance discussions. If a separate problem is evaluated during the same visit, an E/M service with Modifier 25 may also be reported when documentation supports additional work.

Coding Tip: Preventive visit denials often occur when screening ICD-10 codes do not align with payer preventive care policies. Strong eligibility verification ensures screening services are covered before claims go out.

Pap Smear and Cytology

CPT 88141–88167

Cytology codes for Pap smear with variations for manual vs. automated screening. 88141 for manual screening cervical or vaginal smear, 88164–88167 for automated screening with thin-layer preparation. Pair with HPV DNA testing codes 87624, 87625 for co-testing.

CPT 87624, 87625

HPV DNA testing codes, often paired with Pap smears for co-testing. 87624 for high-risk HPV DNA, 87625 for HPV DNA with genotyping. Common pitfall: billing Pap smears with screening ICD-10 when visit was diagnostic. Documentation must show medical necessity and screening purpose clearly to prevent denials.

Common pitfall: Mismatch between screening ICD-10 and diagnostic purpose leads to denials. Document medical necessity explicitly.

Colposcopy and Biopsy

CPT 57452

Colposcopy of cervix without biopsy or endocervical curettage. Basic colposcopic examination only. Documentation should specify procedure type clearly. Without biopsy documentation, coding defaults to lowest level, reducing reimbursement.

CPT 57454

Colposcopy of cervix with biopsy(s) only. Includes cervical biopsy without endocervical curettage. Documentation must specify “with biopsy.” Missing detail defaults to lowest level code, creating underpayments requiring recovery efforts and appeals.

CPT 57461

Colposcopy of cervix with endocervical curettage, with or without biopsy. Includes both ECC and cervical biopsy when performed. Documentation must specify “with biopsy” or “with ECC.” Missing this detail defaults coding to lowest level, reducing reimbursement significantly.

Documentation should specify “with biopsy” or “with ECC.” Missing this detail defaults coding to the lowest level, reducing reimbursement and creating underpayments that require recovery efforts.

OB/GYN Ultrasound 

CPT 76830

Transvaginal ultrasound of pelvis, complete evaluation of uterus, ovaries, endometrium. Requires careful diagnosis linkage, routine pregnancy ICD-10 differs from threatened abortion. Wrong link holds claims in AR. Document clinical indication, measurement findings, and anatomical structures evaluated. Common for early pregnancy evaluation and gynecologic pathology assessment.

CPT 76856

Complete pelvic ultrasound, non-obstetric. Includes transabdominal approach evaluating uterus, ovaries, endometrium, adnexa. Require careful diagnosis linkage. A “routine pregnancy” ICD-10 differs from “pelvic pain” or “abnormal bleeding,” and wrong link can hold claims in AR backlog.

CPT 76801

First trimester obstetric ultrasound, transabdominal approach, real-time with image documentation. Includes fetal heart rate evaluation, gestational age determination. First trimester ultrasound requires specific diagnosis linkage for medical necessity. Document clinical indication and findings clearly.

CPT 76805

Second/third trimester obstetric ultrasound, transabdominal approach, real-time with image documentation. Includes fetal anatomy survey, growth measurements, amniotic fluid assessment. Wrong ICD-10 linkage for routine vs. high-risk pregnancy can delay reimbursement. Document medical necessity clearly.

Ultrasounds require careful diagnosis of linkage. A “routine pregnancy” ICD-10 differs from “threatened abortion,” and wrong link holds claims in AR. New ICD-10-CM 2026 codes include updated pregnancy complication classifications.

Pregnancy and Delivery CPT Codes

Pregnancy coding is unique because many services are bundled into global packages. Coders must know when global billing applies and when to use split care codes to prevent denials. While pregnancy care focuses on bundled services, surgical procedures demand detailed operative documentation to prevent underpayments. 

Global OB Care Codes

CPT 59400

Vaginal delivery including antepartum care and postpartum care (global package). The same provider must deliver all components. If care is shared, separate coding is required. Incorrect global billing is the top denial source in OB. Practices with strong denial management reclaim revenue when payers dispute bundled claims. Document all antepartum visits and postpartum follow-up.

CPT 59510

Cesarean delivery including antepartum care and postpartum care (global package). Includes routine obstetric care, cesarean section delivery, postpartum care. Same provider requirement applies. Common denial trigger: billing global when antepartum care provided by a different physician. Document provider continuity and all care components accurately.

CPT 59610

VBAC (vaginal birth after cesarean) with routine antepartum and postpartum care (global package). Includes previous cesarean history, attempted vaginal delivery, postpartum care. The same provider must deliver all components. Document prior cesarean and current VBAC attempt clearly.

CPT 59618

Attempted VBAC, cesarean performed (global package). Includes previous cesarean history, attempted vaginal delivery that converted to cesarean, postpartum care. Document conversion reason and all care components. Global packages only apply when the same provider delivers all components. If care is shared, separate coding is required.

Global packages only apply when the same provider delivers all components. If care is shared, separate coding is required. ACOG provides guidance on global package usage.

Incorrect global billing is a top source of denials in OB. Practices with strong denial management reclaim revenue when payers dispute bundled claims.

Antepartum and Postpartum Codes

CPT 59425

Antepartum care only, 4–6 office visits. Includes history, examination, routine prenatal care services. Visit count determines code selection, coding 59425 for 7+ visits triggers payer scrutiny. Track each visit carefully. These codes will be deleted in 2027. Use E/M codes with modifier TH as transition preview to new maternity care structure.

CPT 59426

Antepartum care only, 7 or more office visits. Includes history, examination, routine prenatal care services. Visit count matters, coding 59425 for patient with 7 visits triggers payer scrutiny. Track each visit to avoid errors. These codes will be deleted in 2027 when new maternity care codes launch. Use E/M codes with modifier TH.

CPT 59430

Postpartum care only, routine follow-up without delivery. Includes 6-week postpartum visit, routine postpartum care when delivery performed by other provider. Document that postpartum care only, not including delivery. Common when patient delivers elsewhere but follows up with primary OB/GYN provider.

Coding Tip: Visit counts matter. Coding 59425 for a patient with 7 visits triggers payer scrutiny. Tracking each visit avoids errors.

OB Ultrasound in Pregnancy

CPT 76815

Limited obstetric ultrasound, transabdominal approach, real-time with image documentation. Includes assessment of fetal heart rate, amniotic fluid volume, fetal number. Payers often request justification. Notes like “heartbeat confirmation” or “amniotic fluid assessment” make medical necessity clear and reduce AR delays.

CPT 76816

Follow-up obstetric ultrasound, transabdominal approach, real-time with image documentation. Includes evaluation for growth or prior abnormality follow-up. Payers often request justification. Notes like “follow-up scan for low-lying placenta” or “growth restriction monitoring” make medical necessity clear and reduce AR delays significantly.

Requirement: Payers often request justification for repetitive ultrasounds.Notes like “follow-up scan for low-lying placenta” make medical necessity clear and reduce AR delays. Documentation must show medical necessity for follow-up scans.

OBGYN Surgical CPT Codes

Surgical procedures require attention to detail. The approach, specimen count, and modifiers all affect coding. A single missed detail in the operative note can cause weeks of AR backlog. Surgical procedures demand precision, but fertility services demand even more scrutiny due to payer cost concerns and patient-pay responsibility. 

Hysterectomy

CPT 58150

Total abdominal hysterectomy, including cervix when performed. Surgeons often abbreviate techniques (e.g., “TAH”). Coders must match shorthand to full CPT descriptions. Inaccurate coding leads to payer downcoding and underpayment. Operative note must specify approach, specimen count, and any additional procedures performed during the same session.

CPT 58200–58294

Range of vaginal, laparoscopic, and radical hysterectomies. 58260 for laparoscopic simple hysterectomy, 58290 for radical laparoscopic hysterectomy. Surgeons often abbreviate techniques like “TLH” (total laparoscopic hysterectomy). Coders must match shorthand to full CPT descriptions. Inaccurate coding leads to payer downcoding and preventable underpayments.

Important Tip: Inaccurate coding from abbreviations leads to payer downcoding. Match operative note shorthand to complete CPT descriptions.

Myomectomy and D&C CPT Codes 

CPT 58140

Myomectomy, excision of fibroids from uterus, abdominal approach. Dependent on the number and size of fibroids documented. If fibroid sizes aren’t documented, coders must default to lowest-paying code, causing preventable underpayments that need appeal and recovery. Document each fibroid’s size and location.

CPT 58145

Myomectomy, excision of fibroids from uterus, laparoscopic approach. Dependent on number/size of fibroids. The Laparoscopic approach requires different coding than the abdominal. If fibroid sizes aren’t documented, coders default to lowest-paying code, causing preventable underpayments requiring appeal and recovery efforts.

CPT 58120

Dilation and curettage, diagnostic or therapeutic. Includes endocervical and endometrial curettage. If fibroid sizes aren’t documented for myomectomy, coders must default to lowest-paying code. D&C requires pathology documentation for medical necessity. Missing notes often lead to payer denials and revenue loss.

If fibroid sizes aren’t documented, coders must default to the lowest-paying code, causing preventable underpayments that need appeal and recovery.

LEEP and Biopsy

CPT 57522

LEEP (loop electrosurgical excision procedure) of cervix, including introduction of speculum and local anesthesia. Requires pathology documentation for medical necessity. Missing pathology notes often lead to payer denials. Document lesion size, location, and clinical indication for LEEP procedure.

CPT 58100

Endometrial biopsy, without cervical dilation. Requires pathology documentation for medical necessity. Missing notes often lead to payer denials. Document clinical indication (abnormal bleeding, postmenopausal bleeding, endometrial cancer screening). Both LEEP and endometrial biopsy require pathology correlation for payment.

Both require pathology documentation for medical necessity. Missing notes often lead to payer denials and revenue loss.

Laparoscopic Procedures CPT Codes

CPT 58661

Laparoscopic oophorectomy, unilateral or bilateral. Multiple laparoscopic services in one session require modifiers 59 or 51. Without modifiers, payers bundle services, leading to reduced payments. Document each procedure separately, anatomical side, and medical necessity for each service performed during the same operative session.

CPT 58670

Laparoscopic tubal cautery/ligation, partial or total. Multiple laparoscopic services in one session require modifiers 59 or 51. Without them, payers bundle services, reducing payments. The CMS Physician Fee Schedule outlines bundling edits. Document procedure type and anatomical side clearly.

Important Tip: Multiple laparoscopic services in one session require modifiers (59 or 51). Without them, payers bundle services, leading to reduced payments. The CMS Physician Fee Schedule outlines bundling edits.

Fertility and Contraception CPT Codes

Family planning and infertility services require precise documentation. Payers often scrutinize these claims closely due to cost and patient-pay responsibility. Surgical procedures require precision, but fertility services demand even more scrutiny due to payer cost concerns and patient-pay liability. 

IUD and Implant CPT Codes

• 58300, 58301 – IUD insertion/removal.
• 11981, 11982 – Implant insertion/removal.

Lot numbers and product details must be recorded. Missing this information is a common reason for claim rejections.

Tubal Ligation Codes

• 58600, 58615 – Tubal ligation standalone or at cesarean.
  

Errors occur when ligation is billed alongside delivery without correct modifiers. Coders should verify operative notes carefully.

Fertility and IVF Codes

• 58321, 58322 – Artificial insemination.
• 58970 – Oocyte retrieval.
• 58974 – Embryo transfer.

These are high-value services often outside payer coverage. Eligibility checks and upfront patient counseling prevent AR backlogs and unpaid balances.

Practices with strong AR management handle these balances effectively and keep revenue flowing.

Important Modifiers in OB/GYN Coding

Modifiers explain circumstances payers don’t see in the CPT code itself. In OB/GYN, correct modifier use can prevent bundling errors, denials, and audits.

Modifier	Purpose	Example	Documentation Tip	Why it matters
Modifier 22 – Increased Procedural Service	Used when a procedure is significantly more complex or time consuming than usual	A cesarean delivery complicated by extensive adhesions or uncontrolled hemorrhage	Detail the unusual complexity, operative time, and clinical justification	Can increase reimbursement, but only if payers accept the justification
Modifier 25: Significant E/M on Same Day	Used when a problem-oriented E/M service is provided during the same visit as a preventive service or minor procedure	A patient may come in for a Pap smear (preventive), but the provider also treats an acute UTI	Clearly separate preventive vs. problem work. Include a distinct HPI, assessment, and plan for the problem visit	Without this, payers bundle everything into preventive, leaving the E/M unpaid. A well-placed line in the note, “Acute cystitis treated beyond preventive scope”, protects revenue.
Modifier 53 – Discontinued Procedure	Applied when a procedure is started but discontinued due to patient safety or other extenuating circumstance	A D&C aborted because of excessive bleeding risk	Explain why the procedure was discontinued and at what stage	Prevents payers from assuming the full service was delivered
Modifier 79 – Unrelated Procedure During Post-Op Period	Used when a patient returns for an unrelated procedure during the global surgical period	A patient who had a cesarean (global package) later undergoes IUD insertion	Clarify that the service was unrelated to the prior surgery	Allows separate reimbursement for services that would otherwise be included in the global package.

Modifier misuse is one of the most common reasons for claims not being paid. A strong coding support team ensures documentation justifies every modifier.

ICD-10-CM Updates for OBGYN 

New ICD-10-CM codes in 2026 include updated pregnancy complication classifications and heart failure codes. ICD-10 didn’t just change in 2026; rather, it grew significantly. Several new codes directly affect OBGYN billing. Wrong diagnosis linkage can hold claims in AR. Ensure medical necessity matches code selection.

New codes break down heart failure classifications and pregnancy complications more specifically. Ultrasounds require careful diagnosis linkage, a “routine pregnancy” ICD-10 differs from “threatened abortion,” and wrong link holds claims in AR.

Strengthen Revenue Cycle with Smarter OB/GYN Coding 

OB/GYN coding success requires more than CPT accuracy, it demands strong documentation, precise modifier use, denial prevention, payer compliance, and integrated RCM workflows.

AnnexMed helps OBGYN practices improve coding accuracy, strengthen claim quality, reduce denials, and optimize reimbursement across preventive care, pregnancy services, surgical procedures, fertility treatments, and global OB billing workflows.

Practices that invest in coding accuracy and proactive revenue cycle processes don’t just reduce denials and underpayments, they create a steady foundation for sustainable growth.

FAQs

1. What is included in the global OB package?

The global OB package generally includes routine prenatal care, delivery services, and postpartum care when provided by the same physician or group practice. Ultrasounds, high-risk pregnancy management, and certain procedures are typically billed separately.

2. Can Modifier 25 be billed with a preventive visit?

Yes. Modifier 25 may be used when a significant, separately identifiable problem-oriented E/M service is performed during the same visit as a preventive service and documentation supports additional work.

3. What CPT code is used for colposcopy with biopsy?

Colposcopy procedures involving biopsy are generally reported using CPT codes within the 57452–57461 range, depending on whether biopsy, ECC, or additional procedures are performed.

4. Can OB ultrasounds be billed separately from global OB care?

Yes. Most ultrasound services are not included in the global obstetric package and may be billed separately when documentation supports medical necessity.

5. What modifiers are most commonly used in OBGYN billing?

Modifier 25, Modifier 22, Modifier 24, Modifier 51, Modifier 53, Modifier 59, and Modifier 79 are among the most frequently used modifiers in OBGYN coding.

6. What documentation is required for fertility services?

Documentation should include treatment indication, prior authorization information when applicable, treatment plans, laboratory findings, and physician recommendations supporting medical necessity.