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

NATALIE BIRNBAUM LCSW
NPI 1649920489
Social Worker - Clinical in Waltham, MA

Active since March 25, 2022
1106 TRAPELO RD, WALTHAM, MA 02451(973) 495-3267 Get Directions Write a Review

NPPES record last updated: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Natalie Birnbaum Lcsw NPPES

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

NATALIE BIRNBAUM LCSW (NPI 1649920489) is an individual clinical provider in Waltham, Massachusetts, licensed in New York (092051-01) and active in the NPI registry since March 2022.

NPPES Registry Identity

NPI1649920489
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameNATALIE BIRNBAUMCredential: LCSW
Location Address1106 TRAPELO RDWaltham, MA 02451-3236
Mailing Address1106 Trapelo RdWaltham, MA 02451-3236 · (973) 495-3267
Sole ProprietorYes
Enumeration DateMarch 25, 2022
Last NPPES UpdateSeptember 30, 2026
NPPES CertifiedSeptember 30, 2026
✔ NPI 1649920489 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 · 092051-01
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.
1106 TRAPELO RD, Waltham, MA 02451

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 Natalie Birnbaum's NPI number?

The NPI number for Natalie Birnbaum is 1649920489. It was assigned to this individual provider in the NPPES registry on March 25, 2022.

Where is Natalie Birnbaum located?

Natalie Birnbaum practices at 1106 Trapelo Rd, Waltham, MA 02451. The listed phone number is (973) 495-3267.

What is Natalie Birnbaum'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 Natalie Birnbaum was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.