MS. JOYCE MIERZEJWSKI LPC
NPI 1417013962
Counselor - Mental Health in Montclair, NJ

Q: What is Joyce Mierzejwski's NPI number?

The NPI number for Joyce Mierzejwski is 1417013962. It was assigned to this individual provider in the NPPES registry on December 29, 2006.

Q: What is Joyce Mierzejwski's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Q: When was this NPI record last updated?

The NPPES record for Joyce Mierzejwski was last updated on March 24, 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.

Active since December 29, 2006

8 HILLSIDE AVE STE 107, MONTCLAIR, NJ 07042(973) 857-5333 Get Directions Write a Review

NPPES record last updated: March 24, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About Ms. Joyce Mierzejwski Lpc NPPES

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

MS. JOYCE MIERZEJWSKI LPC (NPI 1417013962) is an individual mental health provider in Montclair, New Jersey, licensed in New Jersey (PC0515) and active in the NPI registry since December 2006.

NPPES Registry Identity

NPI1417013962

Entity TypeIndividualFemale

Primary Taxonomy101YM0800X

Provider Legal NameMS. JOYCE MIERZEJWSKICredential: LPC

Location Address8 HILLSIDE AVE STE 107Montclair, NJ 07042-2129

Mailing Address7 Pierson PlGlen Ridge, NJ 07028-1208 · (973) 857-5333

Phone(973) 857-5333

Sole ProprietorYes

Enumeration DateDecember 29, 2006

Last NPPES UpdateMarch 24, 2026

NPPES CertifiedMarch 24, 2026

✔ NPI 1417013962 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers

Taxonomy Code101YM0800X

License✔ Licensed in NJ · PC0515

8 HILLSIDE AVE STE 107, Montclair, NJ 07042

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Other Identifiers 1

Other0515NJ · License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Other Providers at the Same Location NPPES

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

THE FAMILY CENTER AT MONTCLAIR

Community/Behavioral Health

8 HILLSIDE AVE STE 107
MONTCLAIR, NJ 07042

Essex County (973) 857-5333

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 Joyce Mierzejwski's NPI number?

The NPI number for Joyce Mierzejwski is 1417013962. It was assigned to this individual provider in the NPPES registry on December 29, 2006.

Where is Joyce Mierzejwski located?

Joyce Mierzejwski practices at 8 Hillside Ave Ste 107, Montclair, NJ 07042. The listed phone number is (973) 857-5333.

What is Joyce Mierzejwski's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

What insurance does Joyce Mierzejwski accept?

Health plans from Providence Health Plan list Joyce Mierzejwski 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 Joyce Mierzejwski was last updated on March 24, 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.