Lan Zhang, MD
Internal Medicine Physician · Stockton, CA
Lan Zhang, MD is an internal medicine physician with a practice address in Stockton, California, and NPI 1871671610, issued on Nov 1, 2006. Check the license (California A81856, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lan Zhang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A81856 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2505 W Hammer LN, Stockton, CA 95209
- Phone
- (209) 957-7050
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 16, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicaid ID
- 00A818560 CA
- Medicare enrollment
- Enrolled (PECOS I20110531000322); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2505 W Hammer LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Seema Abbasi, MBBSInternal Medicine Physician1588087738
- Emmeline Abellera, FNP-C, MSNNurse Practitioner1720144785
- Saleha Ahmed, M.D.Internal Medicine Physician1275561805
- Syed Ali, MDFamily Medicine Physician1548349038
- Krystle Balduzzi, MDPediatrics Physician1689993396
- Harsimran Basra, MDInternal Medicine Physician1710220454
Verify Lan Zhang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A81856Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
423 Medicare Part D claims for 78 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate49 claims
- Atorvastatin Calcium41 claims
- Losartan Potassium23 claims
- Gabapentin18 claims
- Cyclobenzaprine Hcl16 claims
- Omeprazole16 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.
Bills Medicare through one group practice
- Alameda Health SystemHayward, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lan Zhang among 17,696 internal medicine physician records in California
Lan 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 fileYes · 63% of these records are
- Graduated1985 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 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).
89 internal medicine physician records list a practice address in Stockton
They are 89 of the 9,522 NPPES records with a practice address in Stockton, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Stockton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Seema Abbasi, MBBSStockton, CA 952091588087738
- Saleha Ahmed, M.D.Stockton, CA 952091275561805
- Harsimran Basra, MDStockton, CA 952091710220454
- James Belogorsky, MDStockton, CA 952091336104207
- John Blinn, MDStockton, CA 952091992761357
- Peter Drummond, DOStockton, CA 952091508822768
- Mita Gordo, MDStockton, CA 952091619933553
- Suresh Hosuru, M.D.,Stockton, CA 952091477782910
Common questions
What is Lan Zhang, MD's NPI number?
Lan Zhang, MD's National Provider Identifier (NPI) is 1871671610, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lan Zhang, MD located?
The NPPES record lists a practice address at 2505 W Hammer LN, Stockton, CA, 95209. Phone: (209) 957-7050. Providers update this record themselves, so call before visiting.
How can I verify Lan Zhang, MD's license?
NPPES lists California license number A81856, 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 Lan Zhang, MD prescribe under Medicare Part D?
In 2024, Lan Zhang, MD had 423 Medicare Part D claims for 78 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.