Read this first — the maternity global package ends 1 January 2027. Under the AMA’s CPT 2027 maternity restructure, the global obstetric package is retired: 17 codes are deleted, 12 are new and 6 are revised, effective 1 January 2027. Obstetric care moves to four separately reported phases — antepartum, labor management, delivery and postpartum. The codes referenced on this page remain valid through 31 December 2026. We are already migrating client workflows ahead of the change — see our 2027 maternity coding changes guide.
OB/GYN Medical Billing Services in California
AMS Solutions provides specialized ob/gyn medical billing for practices across California. Whether you’re in Los Angeles, San Francisco, San Diego, Sacramento, or anywhere statewide, our AAPC-certified billers handle the full ob/gyn code set (the maternity global package (59400, 59510, 59610, 59618), the full ultrasound set (the obstetric ultrasound code set), and GYN procedures) and the complex California payer landscape including Medi-Cal Managed Care that California practices encounter.
California-specific payer landscape
California OB/GYN billing crosses Medi-Cal Managed Care (Anthem Blue Cross Partnership, Blue Shield Promise, Health Net, L.A. Care, Inland Empire Health Plan), commercial Blue Shield and Anthem, Kaiser (when out-of-network), UnitedHealthcare, Cigna, and Aetna. Noridian is the MAC for CA Medicare Part B with its own LCDs.
Where California ob/gyn revenue leaks
- Medi-Cal Managed Care patient transfers mid-pregnancy — antepartum-only splits (59425/59426)
- Multi-gestation ultrasound coding (76802, 76810) on twins/IVF pregnancies
- Same-day GYN procedure + E/M bundling without Modifier 25
- Medi-Cal Family PACT enrollment and billing for family planning services
- 21-day Medi-Cal claim submission window — late = denied
What AMS handles for California practices
- Pre-encounter eligibility verification and benefit checks
- Coding, charge entry, and claim submission
- Denial management and appeals (we don’t write off — we fight)
- A/R follow-up and patient statements
- Monthly reporting tied to your practice management system
California compliance
California Health & Safety Code requires patient itemized billing on request within 30 days. We sign a BAA for covered services and meet California Confidentiality of Medical Information Act (CMIA) requirements. AMS Solutions, Inc. serves California practices remotely with secure data exchange under a signed BAA.
Get a OB/GYN Billing Assessment for Your California Practice
Call 866-973-2221 or book a 30-minute review with our team. We’ll audit your last 90 days of claims, flag every recoverable issue, and show you exactly what’s leaking — no obligation.
Yes — Anthem Blue Cross Partnership, Blue Shield Promise, Health Net, L.A. Care, IEHP, Molina, and the regional plans.
We split the global maternity package into antepartum (59425 4-6 visits, 59426 7+ visits), delivery (59409/59514), and postpartum (59430) — billed to the correct payer for each segment.
Yes. We bill Family PACT for participating providers with the correct service codes and confidentiality protections.
95%+ on first pass. Complex Medi-Cal Managed Care requires precise plan-specific submission.
Yes — we meet both standards. All BAAs reflect CMIA requirements.
Related resources
See our full OB/GYN Medical Billing services, California medical billing services, or download the 2026 OB/GYN CPT Cheat Sheet.