Cassie Tseng
Occupational Therapist · Thousand Oaks, CA
Cassie Tseng is an occupational therapist with a practice address in Thousand Oaks, California, and NPI 1215301783, issued on Nov 21, 2015. Check the license (California OT18151, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassie Tseng
- Primary taxonomy
- Occupational Therapist 225X00000X
- License number
- OT18151 CA
Self-reported in NPPES; status is on the state search - Practice location
- 375 Rolling Oaks Dr # 310, Thousand Oaks, CA 91361
- Phone
- (805) 497-7015
- Enumerated
- Nov 21, 2015
- Record last updated
- May 7, 2024
- Fax
- (805) 497-7315
- Medicare enrollment
- Enrolled (PECOS I20171212002122); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest occupational therapist records → All 9,244 in California → Look up another NPI →
Verify Cassie Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OT18151Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Southern California Permanente Medical GroupBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassie Tseng among 9,244 occupational therapist records in California
Cassie Tseng is one of 9,244 occupational therapist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 33% of them.
- NPI issued2015 · 33% of these records are older, 62% newer
- In a Medicare fileYes · 9% of these records are
- In the CMS Doctors and Clinicians fileYes · 10% of these records are
- Graduated2017 · median 2018 among the 910 with a school on file
- Record last updated2024 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 225X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 occupational therapist records list a practice address in Thousand Oaks
They are 29 of the 2,434 NPPES records with a practice address in Thousand Oaks, and 9,244 occupational therapist records in California.
All 9,244 in California → Every provider in Thousand Oaks → Occupational Therapist nationwide →
The 8 occupational therapist records with the nearest ZIP codes
- Sandra HarouniWestlake Village, CA 913611003440819
- Sarah Heringer, OTRWestlake Village, CA 913611922632918
- Marcella HernandezWestlake Village, CA 913611487275392
- Chinh Ho, OTRWestlake Village, CA 913611932732377
- Rebecca Kannapell, OTR/LWestlake Village, CA 913611134753098
- Roslynn Koran, OTRWestlake Village, CA 913611679106280
- Kristine Lucas, MA,OTR/LWestlake Village, CA 913611770910382
- Maria NievesWestlake Village, CA 913611508487802
Common questions
What is Cassie Tseng's NPI number?
Cassie Tseng's National Provider Identifier (NPI) is 1215301783, issued on Nov 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Cassie Tseng located?
The NPPES record lists a practice address at 375 Rolling Oaks Dr # 310, Thousand Oaks, CA, 91361. Phone: (805) 497-7015. Providers update this record themselves, so call before visiting.
How can I verify Cassie Tseng's license?
NPPES lists California license number OT18151, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.