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MATTHEW SIDLER
NPI 1093488520
Social Worker - Clinical in Montclair, NJ

Active since July 29, 2021Opted out of Medicare · through Apr 30, 2028
75 MIDLAND AVE STE 3, MONTCLAIR, NJ 07042(973) 532-2132 Get Directions Write a Review

NPPES record last updated: February 25, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 19, 2023, Jul 29, 2021 (2 updates tracked since 2021).

About Matthew Sidler NPPES

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

MATTHEW SIDLER (NPI 1093488520) is an individual clinical provider in Montclair, New Jersey and active in the NPI registry since July 2021. He has opted out of Medicare through April 30, 2028.

NPPES Registry Identity

NPI1093488520
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMATTHEW SIDLER
Location Address75 MIDLAND AVE STE 3Montclair, NJ 07042-2915
Mailing Address301 Claremont Ave Apt 3Montclair, NJ 07042-2832
Phone(973) 532-2132
Sole ProprietorYes
Enumeration DateJuly 29, 2021
Last NPPES UpdateFebruary 25, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2026
✔ NPI 1093488520 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
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.
75 MIDLAND AVE STE 3, Montclair, NJ 07042
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Matthew Sidler has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 30, 2026 through April 30, 2028.

Opt-Out Effective DateApril 30, 2026
Opt-Out In Effect ThroughApril 30, 2028Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES

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

JOYFUL DISCOVERY COUNSELING, LLC
Clinic/Center (Mental Health (Including Community Mental Health Center))
75 MIDLAND AVE STE 3
MONTCLAIR, NJ 07042
Essex County (973) 532-2132

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 Sidler's NPI number?

The NPI number for Matthew Sidler is 1093488520. It was assigned to this individual provider in the NPPES registry on July 29, 2021.

Where is Matthew Sidler located?

Matthew Sidler practices at 75 Midland Ave Ste 3, Montclair, NJ 07042. The listed phone number is (973) 532-2132.

What is Matthew Sidler's specialty?

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

Is Matthew Sidler enrolled in Medicare?

No. Matthew Sidler has opted out of Medicare through April 30, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Matthew Sidler was last updated on February 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.