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

TIMOTHY YU-WEN LEE
NPI 1821994989
Behavior Technician in Walnut Creek, CA

Active since October 15, 2026
877 YGNACIO VALLEY RD STE 100, WALNUT CREEK, CA 94596(925) 482-3330 Get Directions Write a Review

NPPES record added: October 15, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Timothy Yu-wen Lee NPPES

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

TIMOTHY YU-WEN LEE (NPI 1821994989) is an individual behavior technician in Walnut Creek, California, licensed in California (2830490) and active in the NPI registry since October 2026.

NPPES Registry Identity

NPI1821994989
Entity TypeIndividualMale
Primary Taxonomy106S00000X
Provider Legal NameTIMOTHY YU-WEN LEE
Location Address877 YGNACIO VALLEY RD STE 100Walnut Creek, CA 94596-3897
Mailing Address877 Ygnacio Valley Rd Ste 100Walnut Creek, CA 94596-3897 · (925) 482-3330
Sole ProprietorNo
Enumeration DateOctober 15, 2026
NPPES CertifiedOctober 15, 2026
✔ NPI 1821994989 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyBehavior TechnicianBehavioral Health & Social Service Providers
Taxonomy Code106S00000X
License✔ Licensed in CA · 2830490
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.
877 YGNACIO VALLEY RD STE 100, Walnut Creek, CA 94596

Other Providers at the Same Location NPPES 20

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

Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596
Behavior Technician
877 YGNACIO VALLEY RD STE 100
WALNUT CREEK, CA 94596

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 Timothy Yu-wen Lee's NPI number?

The NPI number for Timothy Yu-wen Lee is 1821994989. It was assigned to this individual provider in the NPPES registry on October 15, 2026.

Where is Timothy Yu-wen Lee located?

Timothy Yu-wen Lee practices at 877 Ygnacio Valley Rd Ste 100, Walnut Creek, CA 94596. The listed phone number is (925) 482-3330.

What is Timothy Yu-wen Lee'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 Timothy Yu-wen Lee was last updated on October 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.