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

William John Pierson

Individual provider Mental Health Counselor · NPI 1275773129

William John Pierson is a Mental Health Counselor in Holyoke, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2009.

Licensed in
MA
In the registry since
2009

Practice location Address checks out

319 Beech St
Holyoke, MA 01040-3925
Phone: (413) 540-1155
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence 3674 (MA)

Record details

NPI number1275773129
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 4, 2009
Last updated in NPPESMarch 4, 2009
Mailing address3 Pine Brook Dr, Belchertown, MA 01007-9707

Other providers in Holyoke