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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

NICOLE GELIN
NPI 1952042889
Nurse Practitioner - Psychiatric/Mental Health in Waltham, MA

Active since April 05, 2022
431 RIVER ST STE 2, WALTHAM, MA 02453(781) 891-0555(508) 302-8448 Get Directions Write a Review

NPPES record last updated: June 16, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 4, 2026, Sep 3, 2024, Apr 5, 2022 (3 updates tracked since 2022).

About Nicole Gelin NPPES

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

NICOLE GELIN (NPI 1952042889) is an individual psychiatric/mental health provider in Waltham, Massachusetts, licensed in Massachusetts (APRN10002583) and active in the NPI registry since April 2022.

NPPES Registry Identity

NPI1952042889
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameNICOLE GELIN
Location Address431 RIVER ST STE 2Waltham, MA 02453-5483
Mailing Address431 River St Ste 2Waltham, MA 02453-5483 · (781) 966-5679 · Fax (508) 302-8448
Phone(781) 891-0555
Fax(508) 302-8448
Sole ProprietorNo
Enumeration DateApril 5, 2022
Last NPPES UpdateJune 16, 20263 updates tracked since enumeration
NPPES CertifiedJune 16, 2026
✔ NPI 1952042889 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in MA · APRN10002583
Also ListedRegistered Nurse · Psychiatric/Mental Health, AdultTaxonomy 163WP0809X · License RN2262602 (MA)
431 RIVER ST STE 2, Waltham, MA 02453
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Other Names 1

Former Name (1)N/a N/a Registered Nurse

Other Providers at the Same Location NPPES 10

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

KAITLIN BELOWICH LICSW
Social Worker (Clinical)
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5677
XIAOYENAN XU
Social Worker
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5678
DEBBIE WILLIAMS M.ED.
Counselor (Mental Health)
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5639
KAYLA JEAN BROGAN
Counselor (Mental Health)
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5645
NATHALIA CALDEEF
Community Health Worker
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5685
JOSHUA BEEBE LICSW
Social Worker (Clinical)
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5669
JASMINE WEAVER
Counselor
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5673
MRS. ALLISON SUZANNE WHITE LICSW
Social Worker (Clinical)
431 RIVER ST STE 2
WALTHAM, MA 02453
Middlesex County (781) 966-5666

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 Nicole Gelin's NPI number?

The NPI number for Nicole Gelin is 1952042889. It was assigned to this individual provider in the NPPES registry on April 5, 2022. The provider is also known as N/A N/A Registered Nurse.

Where is Nicole Gelin located?

Nicole Gelin practices at 431 River St Ste 2, Waltham, MA 02453. The listed phone number is (781) 891-0555.

What is Nicole Gelin's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

When was this NPI record last updated?

The NPPES record for Nicole Gelin was last updated on June 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 56 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.