Obstetrics and Gynecology BillingComplete Coding & Revenue Guide (2026)Top CPT codes with current RVU data, denial patterns, modifier rules, bundling pitfalls, and revenue opportunities for obstetrics and gynecology practices.
Top CPT Codes
The highest-value obstetrics and gynecology CPT codes with current RVU data and Medicare payment from the CY 2026 Physician Fee Schedule. Click any code for the full payment, bundling, and modifier guide.
Most practices under-capture revenue on these codes through downcoding, missed modifier 25, stale fee schedules, or misapplied bundling. Our coders audit every line against the documentation before submission so the revenue earned actually gets billed.
Bundling Pitfalls
5 trapsThe code pairs that trigger NCCI edits and CO-97 denials in obstetrics and gynecology. Know these before billing.
59400: 99214: Global OB package (59400 vaginal, 59510 C-section) includes ALL antepartum visits, delivery, and postpartum care. Cannot bill E/M (99214) for routine prenatal visits when billing global OB. Exception: separately identifiable non-OB problem with modifier 25.
58558: 58563: Hysteroscopy diagnostic (58555) bundles with surgical hysteroscopy (58558/58563). If you start diagnostic and convert to surgical, bill only the surgical code.
76801: 76805: First trimester US (76801) vs second/third trimester (76805). Cannot bill both on same date. If scanning in first trimester, use 76801 (includes nuchal translucency measurement if performed).
57454: 57460: Colposcopy with biopsy (57454) bundles with LEEP (57460/57461) on same date. If performing LEEP, the colposcopy is included — do not bill separately.
58301: 58300: IUD removal (58301) + insertion (58300) same visit: separately billable. No bundling issue. But some payers require modifier 51 on the second procedure.
CO-97 bundling denials are recoverable with correct modifier documentation. Most billers write them off. We work each one against the clinical record and resubmit with the right modifier 25 or 59 path.
Modifier Guidance
When to apply each modifier in obstetrics and gynecology claims. Wrong modifier application is the top single-line denial trigger and a leading audit target.
Increased procedural service — use for complex deliveries (morbid obesity, extensive adhesions, repeat C-section with significant scar tissue). Requires operative note documentation of complexity.
Unrelated E/M during global OB period — use when seeing an OB patient for a non-pregnancy problem (UTI, URI) during the antepartum period.
Required on E/M when billing with same-day IUD insertion, endometrial biopsy, or Nexplanon placement. Document the E/M problem separately from the procedure.
Decision for surgery — use on E/M when the visit results in decision to perform major surgery (hysterectomy, C-section) within 24 hours.
Staged/related procedure during postpartum global — use for planned procedures during the postpartum period (tubal ligation after vaginal delivery).
Distinct procedure — use for multiple surgical procedures (e.g., hysteroscopy + laparoscopy same session when not bundled).
Assistant surgeon — use when an assistant is needed for complex gynecologic surgery.
Revenue Opportunities
6 playsThe billing codes and services most obstetrics and gynecology practices under-capture. Each one is a recurring revenue lift, not a one-time fix.
Global OB package revenue: 59400 (vaginal) pays $2,500-3,500. 59510 (C-section) pays $3,500-4,500. With 15-20 deliveries/month, that is $500K-900K/year from deliveries alone.
IUD/Nexplanon insertion: Device (J7307 Mirena = $850, J7301 Paragard = $350) + insertion (58300 = $150) = $500-1,000 per insertion. High-margin, 10-minute procedure. With 10-15 insertions/month = $60K-180K/year.
In-office procedures: Endometrial biopsy (58100 = $100-150), colposcopy with biopsy (57454 = $200-300), LEEP (57460 = $400-600). Each in-office procedure saves the patient a facility visit and captures revenue for the practice.
Ultrasound in-office: 76805 pays $120-180. OB practices performing their own ultrasounds (vs referring to radiology) capture this revenue. With 5-10 scans/day = $150K-350K/year. Equipment: $25-50K.
Minimally invasive surgery: Laparoscopic hysterectomy (58571 = $5,000-7,000) has shorter recovery than open, attracts patients, and pays well. Robotic-assisted surgery commands premium facility fees.
Contraceptive counseling Z-codes: Z30.011 (initial contraceptive counseling) is separately billable with E/M. Often missed as a diagnosis code. Including it captures the counseling revenue.
Documentation Checklist
What the chart must contain to support billing. Missing documentation means audit vulnerability.
- Antepartum care (59400/59510 global): Document each antepartum visit — gestational age, weight, BP, fundal height, FHR, urine protein, glucose. Minimum 4 visits for antepartum care only (59426). 13+ visits = global package. Lab results (CBC, type/screen, GBS, GDM screen) must be in chart.
- Hysterectomy (58571 laparoscopic, 58150 abdominal): Document indication (fibroids with menorrhagia, endometriosis, abnormal bleeding refractory to medical therapy), uterine size, surgical approach rationale, organs removed (uterus +/- tubes +/- ovaries), and pathology.
- Colposcopy/LEEP (57454/57460): Document indication (abnormal Pap — ASCUS HPV+, LSIL, HSIL, AGC), colposcopic findings (acetowhite epithelium, punctation, mosaicism), biopsy locations, and LEEP specimen dimensions if performed.
- IUD/Nexplanon (58300/11981): Document counseling, informed consent, device type, insertion technique, and post-procedure verification (ultrasound for IUD if indicated). For removal difficulties, document attempts and complications.
- Ultrasound (76801-76817): Document indication, fetal number, presentation, placental location, amniotic fluid volume, biometry measurements (BPD, HC, AC, FL), estimated fetal weight, and any anomalies.
Coding Workflow
Step by step approach for coding obstetrics and gynecology encounters correctly.
1. Determine encounter type: prenatal (E/M or global OB), gynecologic (E/M + procedure), or surgical. 2. For prenatal care: if billing global OB (59400/59510), do NOT also bill E/M for routine prenatal visits. Only bill separate E/M for non-OB problems (with modifier 24). 3. For gynecologic visits: bill E/M + any procedures with modifier 25. 4. For Pap/cervical cancer screening: use Z01.411 (routine) or Z12.4 (screening for cervical cancer). Bill Q0091 for Pap collection. 5. For contraception: bill insertion (58300 IUD, 11981 Nexplanon) + device (J7307 Mirena, J7301 Paragard, J7306 Liletta) + E/M-25. 6. For surgery: check global period (major GYN surgery = 90 days). All post-op visits within global are included.
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Everything about Obstetrics and Gynecology billing
What CPT codes does Obstetrics and Gynecology bill most often?
Top Obstetrics and Gynecology codes include 99214 (Established patient office visit, moderate MDM or 30-39 minutes); 99213 (Established patient office visit, low MDM or 20-29 minutes); 99215 (Established patient office visit, high MDM or 40-54 minutes); 99204 (New patient office visit, moderate MDM or 45-59 minutes); 59400 (Obstetrical care).
What are the most common denials in Obstetrics and Gynecology billing?
Obstetrics and Gynecology denials concentrate around medical necessity, bundling, prior authorization, and modifier errors.
Does Go Medical Billing handle Obstetrics and Gynecology?
Yes. Go Medical Billing handles Obstetrics and Gynecology billing with AAPC-certified coders, payer-specific scrub rules, and dedicated account management. Starting at 2.49 percent of collections with no setup fees.
Specialty content reviewed by AAPC-certified coders. CPT codes and descriptions are copyright of the AMA. Medicare payment varies by locality. Commercial rates vary by contract.
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