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 Michigan
AMS Solutions provides specialized ob/gyn medical billing for practices across Michigan. From Detroit to Grand Rapids and the rest of the state, our AAPC-certified billers handle the OB/GYN code set including the maternity care code family, which the AMA has restructured for 2027 (maternity global), the obstetric ultrasound code set (OB ultrasounds), gynecologic procedure codes (GYN procedures), office and outpatient E/M visit codes (well-woman) and the prior authorization for non-emergent C-sections (some payers), advanced ultrasound (3D/4D), and most gynecologic surgeries that Michigan practices need to navigate.
Michigan-specific payer landscape
We work with Michigan Medicaid (Comprehensive Health Care Program via Blue Cross Complete, Meridian, Molina, Priority Health, UnitedHealthcare Community Plan), plus all major commercial plans: Blue Cross Blue Shield of Michigan, Priority Health, HAP, Aetna, UnitedHealthcare. Michigan operates under Wisconsin Physicians Service (WPS) as the Medicare Administrative Contractor. Michigan has unique no-fault PIP rules (post-2019 reform) — practices must verify auto-insurance coverage tier before billing.
OB/GYN services we bill
Our ob/gyn billing team handles maternity global packages, OB ultrasound billing, gynecologic procedure coding (colposcopy, IUD, hysterectomy), and well-woman annuals. We’re particularly strong at managing the common global maternity carve-outs, ICD-10 Z34/O09/Z3A code accuracy, and 99213+59 vs 99213+25 modifier disputes.
Why Michigan ob/gyn practices choose AMS
- Since 1992, handling Medicare billing across all 8 MAC jurisdictions including Wisconsin
- 95%+ clean claim rate on first submission, vs 85-90% industry average
- Signed BAA for covered services
- AAPC-certified coders: every chart is reviewed by a CPC, COC, or CRC
Frequently asked questions
Yes — every plan listed in Comprehensive Health Care Program via Blue Cross Complete, Meridian, Molina, Priority Health, UnitedHealthcare Community Plan. We verify benefits before each billing cycle.
We bill the maternity global package (59400, 59510, 59610, 59618) per payer rules — some carriers require unbundled billing, others want global. We verify which model each payer uses before each pregnancy.
Yes — we handle all OB ultrasound codes including the obstetric ultrasound code set with proper Z3A trimester staging and units billing for twins or multiples. Auditors love clean documentation here.
Ready to talk? Call 866-973-2221 or book a free 30-minute review with our team. We’ll audit a sample of your Michigan ob/gyn claims at no cost.