AHMAD ABOU ABBASS, M.D appears in the CMS NPPES registry as a Transplant Surgery Physician provider holding M.D credentials at 26732 CROWN VALLEY PKWY STE 351, MISSION VIEJO, CA, 92691, with a listed phone of (949) 364-1007. NPI 1790946895 was issued on 06/20/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ABOU ABBASS most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 71 prescription claims written by this provider, covering 37 Medicare beneficiaries and totaling roughly $13K in drug spend, split 30% brand-name and 70% generic by claim count, with an opioid prescribing rate of 21.1%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86.0645/100 for the 2023 performance year (Quality 80.7704, Cost 64.0709), compared with the national average of 83.1.

Transplant Surgery Physician is a narrow specialty nationwide, with 1,026 enrolled providers across 48 states and an average of 275 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.