Gary G. Zhao, MD
Hematology & Oncology Physician · San Jose, CA
Gary G. Zhao, MD is a hematology & oncology physician with a practice address in San Jose, California, and NPI 1124114285, issued on Oct 5, 2006. Check the license (California A83349, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary G. Zhao
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A83349 CA
Self-reported in NPPES; status is on the state search - Practice location
- 751 S Bascom Ave, San Jose, CA 95128
- Phone
- (408) 885-5969
- Enumerated
- Oct 5, 2006
- Record last updated
- Sep 12, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00A833490 CA
- Medicare enrollment
- Enrolled (PECOS I20081218000270); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 751 S Bascom Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Erik Abernethy, PAPhysician Assistant1649577354
- Christopher Abrinko, RESIDENT PHYSICIANStudent in an Organized Health Care Education/Training Program1649017328
- Cherine Abu-Eid, MDAnesthesiology Physician1033173307
- Pallavi AcharyaClinical Social Worker1154807873
Verify Gary G. Zhao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A83349Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
735 Medicare Part D claims for 92 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Prednisone121 claims
- Abiraterone Acetate113 claims
- Tagrisso66 claims
- Bicalutamide39 claims
- Xtandi27 claims
- Hydroxyurea26 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 practice group's MIPS final score for 2023 (Medicare payment program): 80.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- County OF Santa ClaraSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary G. Zhao among 1,583 hematology & oncology physician records in California
Gary G. Zhao, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1988 · median 2003 among the 1,124 with a school on file
- 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 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in San Jose → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Sangeeta Aggarwal, MDSan Jose, CA 951281225008394
- Sang Hoon Lee, M.D.San Jose, CA 951281851346100
- Lee Levitt, MDSan Jose, CA 951281386600211
- Adour Adrouny, M.D.San Jose, CA 951241447298955
- Alaa AltahanSan Jose, CA 951191952757684
- Jankikeerthika Dharmarpandi, MDSan Jose, CA 951191861055782
- Eric Imoto, D.O.San Jose, CA 951191396056438
- Maria Pilar Ivanov, MDSan Jose, CA 951191700930468
Common questions
What is Gary G. Zhao, MD's NPI number?
Gary G. Zhao, MD's National Provider Identifier (NPI) is 1124114285, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary G. Zhao, MD located?
The NPPES record lists a practice address at 751 S Bascom Ave, San Jose, CA, 95128. Phone: (408) 885-5969. Providers update this record themselves, so call before visiting.
How can I verify Gary G. Zhao, MD's license?
NPPES lists California license number A83349, 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 Gary G. Zhao, MD prescribe under Medicare Part D?
In 2024, Gary G. Zhao, MD had 735 Medicare Part D claims for 92 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Gary G. Zhao, MD's MIPS final score?
The 2023 MIPS final score is 80.6 of 100, reported for the practice group. 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.