BRIAN COSTELLO, PHYSICIAN ASSISTANT appears in the CMS NPPES registry as a Surgical Physician Assistant provider holding PHYSICIAN ASSISTANT credentials at 2405 SHADELANDS DR STE 300, WALNUT CREEK, CA, 94598, with a listed phone of (925) 939-8585. NPI 1396833257 was issued on 10/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what COSTELLO 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 658 prescription claims written by this provider, covering 163 Medicare beneficiaries and totaling roughly $16K in drug spend, split 2% brand-name and 98% generic by claim count, with an opioid prescribing rate of 26.1%. 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 84.9435/100 for the 2023 performance year (Quality 78.5759, Cost 72.0692), compared with the national average of 83.1.

Surgical Physician Assistant is a mid-sized specialty nationwide, with 16,119 enrolled providers across 54 states and an average of 316 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.