Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

William Prescott Mason

Individual provider Clinical Social Worker · NPI 1134996101

William Prescott Mason is a Clinical Social Worker in Wellesley, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2023.

Licensed in
MA
In the registry since
2023

Practice location Address checks out

11 Chapel Pl
Wellesley, MA 02481-3130
Phone: (781) 235-4950
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 227463 (MA)

Record details

NPI number1134996101
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedDecember 8, 2023
Last updated in NPPESDecember 8, 2023
Certification dateDecember 8, 2023

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