NPPES file of Aug 9, 2026

Sydney Tien, PA-C

Physician Assistant · Duarte, CA

Sydney Tien, PA-C is a physician assistant with a practice address in Duarte, California, and NPI 1124996731, issued on Oct 27, 2025. Check the license (California PA66997, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124996731
Name
Sydney Tien
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License number
PA66997 CA
Self-reported in NPPES; status is on the state search
Practice location
1500 Duarte RD, Duarte, CA 91010
Phone
(626) 301-8247
Enumerated
Oct 27, 2025
Record last updated
Jan 9, 2026
Fax
(626) 218-5334
Medicare enrollment
Enrolled (PECOS I20251203002098); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest physician assistant records → All 14,451 in California → Look up another NPI →

Also registered at 1500 Duarte RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Chelsea Abad, CRNP, AGPCNP - BCGerontology Nurse Practitioner1952848137
  2. Wajidah Abdul-KhabirHospitalist Physician1215323522
  3. Farah Abdulla, MDDermatology Physician1093934390
  4. Megan Abel, PA-CPhysician Assistant1104100619
  5. Michelle Afkhami, M.D.Hematology (Pathology) Physician1326230228
  6. Vaibhav Agrawal, M.D.Hematology & Oncology Physician1538402565

Verify Sydney Tien in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PA66997    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. City OF Hope Medical FoundationDuarte, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sydney Tien among 14,451 physician assistant records in California

Sydney Tien, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 93% of them.

  • NPI issued2025 · 93% of these records are older, 3% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 50% of these records are
  • Graduated2025 · median 2018 among the 7,214 with a school on file
  • Record last updated2026 · 40% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

54 physician assistant records list a practice address in Duarte

They are 54 of the 1,287 NPPES records with a practice address in Duarte, and 14,451 physician assistant records in California.

All 14,451 in California → Every provider in Duarte → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Seda Barzegar, PADuarte, CA 910101780613943
  2. Mario Cuevas, PACDuarte, CA 910101881763639
  3. Mildred Fabros, PA-CDuarte, CA 910101366405896
  4. Patricia Fann, PACDuarte, CA 910101184731101
  5. Hilary Gibbins, P.A.Duarte, CA 910101639258395
  6. Rose Hiu, PACDuarte, CA 910101538255914
  7. Kalika Johnson, PA-CDuarte, CA 910101689619504
  8. Felicia Kinnard, PA CDuarte, CA 910101982795597

Common questions

What is Sydney Tien, PA-C's NPI number?

Sydney Tien, PA-C's National Provider Identifier (NPI) is 1124996731, issued on Oct 27, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Sydney Tien, PA-C located?

The NPPES record lists a practice address at 1500 Duarte RD, Duarte, CA, 91010. Phone: (626) 301-8247. Providers update this record themselves, so call before visiting.

How can I verify Sydney Tien, PA-C's license?

NPPES lists California license number PA66997, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.