I'm curious which insurance companies are denying the global OB code and why. I've only known a few Medicaid plans who require the global to be broken out. Anyway, there are a few ways to bill for AP and PP care.
1. Bill each AP/PP visit separately. A routine AP/PP visit with no complications is considered to be a 99213 per AAPC and ACOG. The initial AP exam with the full physical, medical/family history, etc., is considered a level 5 (99205 or 99215). Be sure and check the charts or ask the provider to level the visits.
2. Use the global AP and PP codes. 59425 is for 4-6 AP visits, 59426 is for 7+ AP visits. 59430 is for routine PP care.
Hope this helps!