Dr. Daniel Brennan, MD

With 20 years of practice, Dr. Daniel Brennan is an established nephrology provider, MD, after earning their medical degree at University Of Iowa, Rj & L Carver College Of Medicine in 1985. Dr. currently practices across 6 facilities, including Johns Hopkins Hospital, The in Baltimore, Maryland. Their National Provider Identifier (NPI) is 1023036597, 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 Dr. Daniel Brennan as a lower-volume nephrology provider, treating approximately 117 Medicare beneficiaries and delivering 430 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 Dr. Daniel Brennan received $16K in industry payments in 2023. Payments at this scale are in line with specialist-level consulting and speaker-program participation.