Liyan Zhang, MD
Internal Medicine Physician · Vacaville, CA
Liyan Zhang, MD is an internal medicine physician with a practice address in Vacaville, California, and NPI 1033297874, issued on Nov 1, 2006. Check the license (California A79647, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Liyan Zhang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A79647 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Quality Dr, Vacaville, CA 95688
- Phone
- (707) 453-5000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1 Quality Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hydee Abaya Ghazaleh, M.D.Internal Medicine Physician1922688464
- Jonathan Abaya Ghazaleh, MDInternal Medicine Physician1093395535
- Huma Ahmad, D.O.Hospitalist Physician1154587616
- Azim Ahmady, MDFamily Medicine Physician1417035916
- Lamia Alazzawi, PHARM.D.Pharmacist1407380645
- Delaine Alejandro, DOFamily Medicine Physician1487816294
Verify Liyan Zhang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A79647Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% more Medicare Part D claims than the average internal medicine physician in 2024
6,219 Medicare Part D claims for 551 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 72 claims were for opioids.
Most prescribed
- Atorvastatin Calcium527 claims
- Levothyroxine Sodium286 claims
- Amlodipine Besylate250 claims
- Lisinopril250 claims
- Famotidine248 claims
- Losartan Potassium229 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.
Liyan Zhang among 17,696 internal medicine physician records in California
Liyan Zhang, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
53 internal medicine physician records list a practice address in Vacaville
They are 53 of the 1,903 NPPES records with a practice address in Vacaville, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Vacaville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kyaw Aung, MDVacaville, CA 956881386722114
- Hon Chan, M.D.Vacaville, CA 956881265529549
- Anne Chen, M.D.Vacaville, CA 956881003852708
- Thomas Fashinell, MDVacaville, CA 956881609926419
- Andleeb Judge, M.D.Vacaville, CA 956881932141124
- Frank Karneges, DOVacaville, CA 956881336220581
- Richard Lasslo, MDVacaville, CA 956881467526780
- James Lee, MDVacaville, CA 956881134279847
Common questions
What is Liyan Zhang, MD's NPI number?
Liyan Zhang, MD's National Provider Identifier (NPI) is 1033297874, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Liyan Zhang, MD located?
The NPPES record lists a practice address at 1 Quality Dr, Vacaville, CA, 95688. Phone: (707) 453-5000. Providers update this record themselves, so call before visiting.
How can I verify Liyan Zhang, MD's license?
NPPES lists California license number A79647, 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 Liyan Zhang, MD prescribe under Medicare Part D?
In 2024, Liyan Zhang, MD had 6,219 Medicare Part D claims for 551 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.