JOHN W MAZELLAN LCSW
NPI 1851577472
Social Worker - Clinical in Hillsborough, NJ

Active since January 14, 2008
390 AMWELL RD, BLDG 4 / SUITE 401, HILLSBOROUGH, NJ 08844(908) 431-9200(908) 431-9205 Get Directions Write a Review

NPPES record last updated: January 14, 2008. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About John W Mazellan Lcsw NPPES

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

JOHN W MAZELLAN LCSW (NPI 1851577472) is an individual clinical provider in Hillsborough, New Jersey, licensed in New Jersey (44SC00606600) and active in the NPI registry since January 2008.

NPPES Registry Identity

NPI1851577472
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameJOHN W MAZELLANCredential: LCSW
Location Address390 AMWELL RD, BLDG 4 / SUITE 401Hillsborough, NJ 08844-1225
Mailing Address390 Amwell Rd, Bldg 4 / Suite 401Hillsborough, NJ 08844-1225 · (908) 431-9200 · Fax (908) 431-9205
Fax(908) 431-9205
Sole ProprietorYes
Enumeration DateJanuary 14, 2008
NPI 1851577472 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in NJ · 44SC00606600
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
390 AMWELL RD, Hillsborough, NJ 08844

Other Providers at the Same Location NPPES 20

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

Family Medicine
390 AMWELL RD, STE 405
HILLSBOROUGH, NJ 08844
Pediatrics
390 AMWELL RD, SUITE 106
HILLSBOROUGH, NJ 08844
Internal Medicine
390 AMWELL RD, BLDG 5 SUITE 501
HILLSBOROUGH, NJ 08844
Pediatrics
390 AMWELL RD, SUITE 106
HILLSBOROUGH, NJ 08844
Clinic/Center (Rehabilitation)
390 AMWELL RD, SUITE 104
HILLSBOROUGH, NJ 08844
Audiologist-Hearing Aid Fitter
390 AMWELL RD, SUITE 407
HILLSBOROUGH, NJ 08844
Dentist (Orthodontics and Dentofacial Orthopedics)
390 AMWELL RD, SUITE-102
HILLSBOROUGH, NJ 08844
Dietitian, Registered
390 AMWELL RD
HILLSBOROUGH, NJ 08844

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 John Mazellan's NPI number?

The NPI number for John Mazellan is 1851577472. It was assigned to this individual provider in the NPPES registry on January 14, 2008.

Where is John Mazellan located?

John Mazellan practices at 390 Amwell Rd Bldg 4 / Suite 401, Hillsborough, NJ 08844. The listed phone number is (908) 431-9200.

What is John Mazellan's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for John Mazellan was last updated on January 14, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years 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.