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

ELSA NASSAR
NPI 1033020573
Behavior Technician in San Francisco, CA

Active since September 14, 2026
548 MARKET ST STE 99187, SAN FRANCISCO, CA 94104(415) 275-1838(415) 529-5218 Get Directions Write a Review

NPPES record added: September 14, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

About Elsa Nassar NPPES

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

ELSA NASSAR (NPI 1033020573) is an individual behavior technician in San Francisco, California and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1033020573
Entity TypeIndividualFemale
Primary Taxonomy106S00000X
Provider Legal NameELSA NASSAR
Location Address548 MARKET ST STE 99187San Francisco, CA 94104-5401
Mailing Address548 Market St Ste 99187San Francisco, CA 94104-5401 · (415) 275-1838 · Fax (415) 529-5218
Fax(415) 529-5218
Sole ProprietorNo
Enumeration DateSeptember 14, 2026
NPPES CertifiedSeptember 14, 2026
NPI 1033020573 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyBehavior TechnicianBehavioral Health & Social Service Providers
Taxonomy Code106S00000X
Definition
The behavior technician is a paraprofessional who practices under the close, ongoing supervision of a behavior analyst or assistant behavior analyst certified by the Behavior Analyst Certification Board and/or credentialed by a state (such as through licensure). The behavior technician is primarily responsible for the implementation of components of behavior-analytic treatment plans developed by the supervisor. That may include collecting data on treatment targets and conducting certain types of behavioral assessments (e.g., stimulus preference assessments). The behavior technician does not design treatment or assessment plans or procedures but provides services as assigned by the supervisor responsible for his or her work.
548 MARKET ST STE 99187, San Francisco, CA 94104

Other Providers at the Same Location NPPES 18

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

Behavior Technician
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Behavior Technician
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Behavior Analyst
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Assistant Behavior Analyst
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Behavior Technician
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Behavior Technician
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Behavior Analyst
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104
Occupational Therapist (Pediatrics)
548 MARKET ST STE 99187
SAN FRANCISCO, CA 94104

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 Elsa Nassar's NPI number?

The NPI number for Elsa Nassar is 1033020573. It was assigned to this individual provider in the NPPES registry on September 14, 2026.

Where is Elsa Nassar located?

Elsa Nassar practices at 548 Market St Ste 99187, San Francisco, CA 94104. The listed phone number is (415) 275-1838.

What is Elsa Nassar's specialty?

The primary specialty registered for this NPI is Behavior Technician with taxonomy code 106S00000X.

When was this NPI record last updated?

The NPPES record for Elsa Nassar was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.