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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MAX ELLENHORN
NPI 1245087600
Social Worker in Boston, MA

Active since May 03, 2024
225 FRIEND ST, BOSTON, MA 02114(978) 875-2364 Get Directions Write a Review

NPPES record last updated: September 18, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 18, 2026, Oct 11, 2024, May 3, 2024 (3 updates tracked since 2024).

About Max Ellenhorn NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MAX ELLENHORN (NPI 1245087600) is an individual social worker in Boston, Massachusetts, licensed in Massachusetts (LCSW230749) and active in the NPI registry since May 2024.

NPPES Registry Identity

NPI1245087600
Entity TypeIndividualMale
Primary Taxonomy104100000X
Provider Legal NameMAX ELLENHORN
Location Address225 FRIEND STBoston, MA 02114-1800
Mailing Address225 Friend St Ste 800Boston, MA 02114-1834
Phone(978) 875-2364
Sole ProprietorNo
Enumeration DateMay 3, 2024
Last NPPES UpdateSeptember 18, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2026
✔ NPI 1245087600 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in MA · LCSW230749
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
225 FRIEND ST, Boston, MA 02114
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Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CATHERINE ELIZABETH MAYHEW PSY.D.
Psychologist (Clinical)
225 FRIEND ST
BOSTON, MA 02114
Suffolk County (781) 440-0400
DR. LAUREN GRIFFIN PHD
Psychologist
225 FRIEND ST, STE 800
BOSTON, MA 02114
Suffolk County (844) 232-1250
DR. HOLLY MULLER PHD
Psychologist
225 FRIEND ST
BOSTON, MA 02114
Suffolk County (703) 727-5619
MICHAEL COLLINS
Psychologist (Clinical)
225 FRIEND ST
BOSTON, MA 02114
Suffolk County (978) 325-1550

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Max Ellenhorn's NPI number?

The NPI number for Max Ellenhorn is 1245087600. It was assigned to this individual provider in the NPPES registry on May 3, 2024.

Where is Max Ellenhorn located?

Max Ellenhorn practices at 225 Friend St, Boston, MA 02114. The listed phone number is (978) 875-2364.

What is Max Ellenhorn's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Max Ellenhorn was last updated on September 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.