CASSIE TSENG
NPI 1215301783
Occupational Therapist in Thousand Oaks, CA

Active since November 21, 2015
375 ROLLING OAKS DR # 310, THOUSAND OAKS, CA 91361(805) 497-7015(805) 497-7315 Get Directions Write a Review

NPPES record last updated: May 7, 2024. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: May 7, 2024, Nov 14, 2017, Nov 21, 2015 (3 updates tracked since 2015).

About Cassie Tseng NPPES

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

CASSIE TSENG (NPI 1215301783) is an individual occupational therapist in Thousand Oaks, California, licensed in California (OT18151) and active in the NPI registry since November 2015.

NPPES Registry Identity

NPI1215301783
Entity TypeIndividualFemale
Primary Taxonomy225X00000X
Provider Legal NameCASSIE TSENG
Location Address375 ROLLING OAKS DR # 310Thousand Oaks, CA 91361-1023
Mailing Address1540 Alcazar St, Chp-133Los Angeles, CA 90089-0080 · (323) 442-3550
Fax(805) 497-7315
Sole ProprietorNo
Enumeration DateNovember 21, 2015
Last NPPES UpdateMay 7, 20243 updates tracked since enumeration
✔ NPI 1215301783 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOccupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code225X00000X
License✔ Licensed in CA · OT18151
Definition
An occupational therapist is a person who has graduated from an entry-level occupational therapy program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, or approved by the World Federation of Occupational Therapists (WFOT), or an equivalent international occupational therapy education program; has successfully completed a period of supervised fieldwork experience required by the occupational therapy program; has passed a nationally recognized entry-level examination for occupational therapists, and fulfills state requirements for licensure, certification, or registration. An occupational therapist provides interventions based on evaluation and which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapists address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life.
375 ROLLING OAKS DR # 310, Thousand Oaks, CA 91361

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Cassie Tseng is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

Medicare enrollment records show Cassie Tseng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Health Maintenance Organization
5601 DE SOTO AVE
Woodland Hills, CA 91367
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Cassie Tseng's NPI number?

The NPI number for Cassie Tseng is 1215301783. It was assigned to this individual provider in the NPPES registry on November 21, 2015.

Where is Cassie Tseng located?

Cassie Tseng practices at 375 Rolling Oaks Dr # 310, Thousand Oaks, CA 91361. The listed phone number is (805) 497-7015.

What is Cassie Tseng's specialty?

The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.

Is Cassie Tseng enrolled in Medicare?

Yes. Cassie Tseng is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Cassie Tseng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cassie Tseng reassigns Medicare benefits to Southern California Permanente Medical Group (Woodland Hills, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Cassie Tseng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Cassie Tseng was last updated on May 7, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.