Jonathan Pui-Kay Siu, D.O.
Family Medicine Physician · Claremont, CA
Jonathan Pui-Kay Siu, D.O. is a family medicine physician with a practice address in Claremont, California, and NPI 1346652179, issued on May 28, 2014. Check the license (California 20A14265, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan Pui-Kay Siu
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A14265 CA
Self-reported in NPPES; status is on the state search - Practice location
- 250 W San Jose Ave, Claremont, CA 91711
- Phone
- (888) 750-0036
- Enumerated
- May 28, 2014
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 250 W San Jose Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathan Pui-Kay Siu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average family medicine physician in 2024
787 Medicare Part D claims for 143 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium72 claims
- Lisinopril38 claims
- Amlodipine Besylate33 claims
- Metformin Hcl31 claims
- Simvastatin23 claims
- Gabapentin21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $19.31
1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Jonathan Pui-Kay Siu among 17,133 family medicine physician records in California
Jonathan Pui-Kay Siu, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 71% of them.
- NPI issued2014 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 family medicine physician records list a practice address in Claremont
They are 34 of the 800 NPPES records with a practice address in Claremont, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Claremont → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Alan Bergen, M.D.Claremont, CA 917111700022118
- Javier Chang, M.D.Claremont, CA 917111558565366
- Jennie Ho, M.D.Claremont, CA 917111013082403
- Lester Holstein, MDClaremont, CA 917111720088792
- Robyn Jacoby, DOClaremont, CA 917111487623575
- Mary Kasem, MDClaremont, CA 917111982639993
- Yen Lai, MDClaremont, CA 917111033110671
- Paul Orr, M.D.Claremont, CA 917111417950221
Common questions
What is Jonathan Pui-Kay Siu, D.O.'s NPI number?
Jonathan Pui-Kay Siu, D.O.'s National Provider Identifier (NPI) is 1346652179, issued on May 28, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Pui-Kay Siu, D.O. located?
The NPPES record lists a practice address at 250 W San Jose Ave, Claremont, CA, 91711. Phone: (888) 750-0036. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Pui-Kay Siu, D.O.'s license?
NPPES lists California license number 20A14265, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathan Pui-Kay Siu, D.O. prescribe under Medicare Part D?
In 2024, Jonathan Pui-Kay Siu, D.O. had 787 Medicare Part D claims for 143 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions 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.