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

William Diaz

Individual provider Counselor · NPI 1811464266

William Diaz is a Counselor in Boston, Massachusetts. Registered with an NPI since 2018.

In the registry since
2018

Practice location Address checks out

39 Boylston St
Boston, MA 02116
Phone: (617) 654-1218
Show map & directions

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

Specialties & licences

Counselor (primary) Taxonomy 101Y00000X

Record details

NPI number1811464266
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedOctober 24, 2018
Last updated in NPPESOctober 24, 2018
Mailing address39 Boylston St, Boston, MA 02116-4702

Other providers in Boston