Gillian Mayersohn, PSY.D., ABPP

In their first decade of practice, Gillian Mayersohn represents the newer generation of clinical psychologist providers, PSY.D., ABPP, after earning their medical degree at Other in 2017. Gillian currently practices across 4 facilities, including Ssm Health Care Group in Saint Louis, Missouri. Their National Provider Identifier (NPI) is 1265917884, 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 Gillian Mayersohn as a lower-volume clinical psychologist provider, treating approximately 11 Medicare beneficiaries and delivering 49 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.