Donald Siao, MD
Family Medicine Physician · San Jose, CA
Donald Siao, MD is a family medicine physician with a practice address in San Jose, California, and NPI 1861415374, issued on Jul 25, 2006. Check the license (California G73395, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Donald Siao
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G73395 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2690 S White RD, San Jose, CA 95148
- Phone
- (408) 223-7771
- Enumerated
- Jul 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (408) 223-7779
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2690 S White RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Donald Siao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73395Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average family medicine physician in 2024
1,865 Medicare Part D claims for 450 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Atorvastatin Calcium159 claims
- Amlodipine Besylate117 claims
- Losartan Potassium114 claims
- Metformin Hcl91 claims
- Omeprazole60 claims
- Lisinopril57 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.
The MIPS final score for 2023 (Medicare payment program): 14 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $675.39
26 payments; by number, the most common kind was food and beverage; the largest payer was Ibsa Pharma 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.
Donald Siao among 17,133 family medicine physician records in California
Donald Siao, MD 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 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).
265 family medicine physician records list a practice address in San Jose
They are 265 of the 20,925 NPPES records with a practice address in San Jose, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Jose → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Swapnaja ChandrachoodSan Jose, CA 951481992934947
- Shashwati Kale, M.D.San Jose, CA 951481306944459
- Angelica Andrade-Silverman, M.D.San Jose, CA 951381558443531
- Anupama Balakrishnan, MDSan Jose, CA 951351821034232
- James Lockhart, MEDICAL DOCTORSan Jose, CA 951351689937054
- Mahendra Mehta, MDSan Jose, CA 951351710937875
- Nikhat Shaik, M.D.,San Jose, CA 951351780708800
- Phung Doan, M.D.San Jose, CA 951341477507218
Common questions
What is Donald Siao, MD's NPI number?
Donald Siao, MD's National Provider Identifier (NPI) is 1861415374, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald Siao, MD located?
The NPPES record lists a practice address at 2690 S White RD, San Jose, CA, 95148. Phone: (408) 223-7771. Providers update this record themselves, so call before visiting.
How can I verify Donald Siao, MD's license?
NPPES lists California license number G73395, 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 Donald Siao, MD prescribe under Medicare Part D?
In 2024, Donald Siao, MD had 1,865 Medicare Part D claims for 450 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Donald Siao, MD's MIPS final score?
The 2023 MIPS final score is 14 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.