Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

DEREK MATTERN LMSW
NPI 1285532937
Social Worker - Clinical in Queensbury, NY

Active since October 30, 2026
25 WILLOWBROOK RD, QUEENSBURY, NY 12804(518) 926-7100 Get Directions Write a Review

NPPES record added: October 30, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Derek Mattern Lmsw NPPES

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

DEREK MATTERN LMSW (NPI 1285532937) is an individual clinical provider in Queensbury, New York, licensed in New York (126537) and active in the NPI registry since October 2026.

NPPES Registry Identity

NPI1285532937
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameDEREK MATTERNCredential: LMSW
Location Address25 WILLOWBROOK RDQueensbury, NY 12804-5882
Mailing Address22 Us Oval Ste 218Plattsburgh, NY 12903-5902 · (518) 926-7100
Sole ProprietorYes
Enumeration DateOctober 30, 2026
NPPES CertifiedOctober 30, 2026
✔ NPI 1285532937 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 NY · 126537
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.
25 WILLOWBROOK RD, Queensbury, NY 12804

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

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.

Social Worker (Clinical)
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Licensed Practical Nurse
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Counselor (Mental Health)
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Social Worker
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Clinic/Center (Recovery Care)
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Social Worker (Clinical)
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Licensed Practical Nurse
25 WILLOWBROOK RD
QUEENSBURY, NY 12804
Social Worker
25 WILLOWBROOK RD
QUEENSBURY, NY 12804

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 Derek Mattern's NPI number?

The NPI number for Derek Mattern is 1285532937. It was assigned to this individual provider in the NPPES registry on October 30, 2026.

Where is Derek Mattern located?

Derek Mattern practices at 25 Willowbrook Rd, Queensbury, NY 12804. The listed phone number is (518) 926-7100.

What is Derek Mattern'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 Derek Mattern was last updated on October 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.