Marian Callanan, CNS

With 20 years of practice, Marian Callanan is an established certified clinical nurse specialist (cns) provider, CNS, after earning their medical degree at Other in 1976. Marian currently practices across 3 facilities, including Stanford Health Care in Stanford, California. Their National Provider Identifier (NPI) is 1265484984, 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 Marian Callanan as a lower-volume certified clinical nurse specialist (cns) provider, treating approximately 84 Medicare beneficiaries and delivering 114 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.