Lawrence Gassner, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 18404 N TATUM BLVD, Phoenix, AZ, 85032, with a listed phone of (602) 971-5500. NPI 1558379461 was issued on 08/04/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Gassner 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 3,244 prescription claims written by this provider, covering 221 Medicare beneficiaries and totaling roughly $418K in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 1.8%. 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 82.8/100 for the 2023 performance year (Quality 100, Cost 42.7), compared with the national average of 83.1.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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.