MATTHEW GARTHWAIT
NPI 1578929337
Social Worker - Clinical in Rye, NH

Active since January 11, 2016
1245 WASHINGTON RD, RYE, NH 03870(603) 969-7842 Get Directions Write a Review

NPPES record last updated: January 14, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 14, 2026, Jan 11, 2016 (2 updates tracked since 2016).

About Matthew Garthwait NPPES

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

MATTHEW GARTHWAIT (NPI 1578929337) is an individual clinical provider in Rye, New Hampshire, licensed in New Hampshire (2399) and active in the NPI registry since January 2016.

NPPES Registry Identity

NPI1578929337
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMATTHEW GARTHWAIT
Location Address1245 WASHINGTON RDRye, NH 03870-2339
Mailing Address1245 Washington RdRye, NH 03870-2339
Sole ProprietorYes
Enumeration DateJanuary 11, 2016
Last NPPES UpdateJanuary 14, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 14, 2026
NPI 1578929337 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 NH · 2399
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.
1245 WASHINGTON RD, Rye, NH 03870

Accepted Insurance

Other Providers at the Same Location NPPES 7

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

Obstetrics & Gynecology (Gynecology)
1245 WASHINGTON RD
RYE, NH 03870
Counselor (Mental Health)
1245 WASHINGTON RD
RYE, NH 03870
Social Worker (Clinical)
1245 WASHINGTON RD
RYE, NH 03870
Clinic/Center (Mental Health (Including Community Mental Health Center))
1245 WASHINGTON RD
RYE, NH 03870
Counselor (Mental Health)
1245 WASHINGTON RD
RYE, NH 03870
Obstetrics & Gynecology (Gynecology)
1245 WASHINGTON RD
RYE, NH 03870
Obstetrics & Gynecology (Gynecology)
1245 WASHINGTON RD
RYE, NH 03870

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 Matthew Garthwait's NPI number?

The NPI number for Matthew Garthwait is 1578929337. It was assigned to this individual provider in the NPPES registry on January 11, 2016.

Where is Matthew Garthwait located?

Matthew Garthwait practices at 1245 Washington Rd, Rye, NH 03870. The listed phone number is (603) 969-7842.

What is Matthew Garthwait's specialty?

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

What insurance does Matthew Garthwait accept?

Health plans from WellSense Health Plan list Matthew Garthwait as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Matthew Garthwait was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.