Masaru Ishii, M.D.,PH.D.

With 20 years of practice, Masaru Ishii is an established otolaryngology provider, M.D.,PH.D., after earning their medical degree at Perelman School Of Med At The University Of Pennsylvania in 1997. Masaru currently practices across 4 facilities, including Johns Hopkins Bayview Medical Center in Baltimore, Maryland. Their National Provider Identifier (NPI) is 1427004381, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.

CMS Medicare data shows Masaru Ishii as a lower-volume otolaryngology provider, treating approximately 154 Medicare beneficiaries and delivering 532 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.

Under the Physician Payments Sunshine Act, CMS reports that Masaru Ishii received $26 in industry payments in 2023. Payments at this scale are typical for most practicing physicians and generally reflect routine educational activities.