Dr. Grant Wintheiser, MD

In their first decade of practice, Dr. Grant Wintheiser represents the newer generation of hematology/oncology providers, MD, after earning their medical degree at Creighton University School Of Medicine in 2019. Dr. currently practices across 10 facilities, including Mayo Clinic in Rochester, Minnesota. Their National Provider Identifier (NPI) is 1043770092, 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. Grant Wintheiser as a lower-volume hematology/oncology provider, treating approximately 71 Medicare beneficiaries and delivering 133 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.