Siyu Deng
Family Medicine Physician · Upland, CA
Siyu Deng is a family medicine physician with a practice address in Upland, California, and NPI 1235897414, issued on Dec 4, 2021. Check the license (California 95019294, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Siyu Deng
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 95019294 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1004 W Foothill Blvd Ste 200, Upland, CA 91786
- Phone
- (909) 985-1908
- Enumerated
- Dec 4, 2021
- Record last updated
- Dec 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230210000458); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1004 W Foothill Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Biegel, M.D.Internal Medicine Physician1710956412
- Moira Cale, FNPFamily Nurse Practitioner1326882978
- Johnny Dauz, FNP-CFamily Nurse Practitioner1528342607
- Jessica GhabourFamily Nurse Practitioner1447121975
- Kathy Loo, FNP-BCFamily Nurse Practitioner1922795731
- Bijal Mehta, FNPFamily Medicine Physician1194686337
Verify Siyu Deng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 95019294Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average family medicine physician in 2024
3,383 Medicare Part D claims for 214 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 66 claims were for opioids.
Most prescribed
- Atorvastatin Calcium153 claims
- Donepezil Hcl147 claims
- Levothyroxine Sodium145 claims
- Quetiapine Fumarate112 claims
- Risperidone107 claims
- Sertraline Hcl94 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: $13.89
1 payment: food and beverage; the largest payer was Amgen Inc. 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.
Bills Medicare through one group practice
- Albion Medical Partners OF California West PCCerritos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siyu Deng among 17,133 family medicine physician records in California
Siyu Deng 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 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2021 · median 2005 among the 10,652 with a school on file
- 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).
38 family medicine physician records list a practice address in Upland
They are 38 of the 1,846 NPPES records with a practice address in Upland, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Upland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Richard Armour, D.OUpland, CA 917861366488215
- Louis Brenner, M.D.Upland, CA 917861003852815
- Bryan Chan, MDUpland, CA 917861417059957
- Louis Dibernardo, MDUpland, CA 917861528045358
- Warren Regh Gabrillo, M.D.Upland, CA 917861982689295
- Dwight Guan, MDUpland, CA 917861184644676
- Rick Hirsch, D.O.Upland, CA 917861497774954
- James Ho, MDUpland, CA 917861669440988
Common questions
What is Siyu Deng's NPI number?
Siyu Deng's National Provider Identifier (NPI) is 1235897414, issued on Dec 4, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Siyu Deng located?
The NPPES record lists a practice address at 1004 W Foothill Blvd Ste 200, Upland, CA, 91786. Phone: (909) 985-1908. Providers update this record themselves, so call before visiting.
How can I verify Siyu Deng's license?
NPPES lists California license number 95019294, 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 Siyu Deng prescribe under Medicare Part D?
In 2024, Siyu Deng had 3,383 Medicare Part D claims for 214 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.