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

Dr. William Mallon III

Individual provider Mental Health Counselor · NPI 1558737916

Dr. William Mallon III is a Mental Health Counselor in Roslindale, Massachusetts. Licensed in New York. Registered with an NPI since 2015.

Licensed in
NY
In the registry since
2015
Specialties on file
2

Practice location Address checks out

780 American Legion Hwy
Roslindale, MA 02131-3908
Phone: (617) 529-9281
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 023543 (NY)
Mental Health Counselor Taxonomy 101YM0800X

Record details

NPI number1558737916
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedAugust 19, 2015
Last updated in NPPESJuly 13, 2022
Certification dateJuly 13, 2022
Mailing address718 Smyth Rd, Manchester, NH 03104-7007

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