Jose Maria Guanzon Guanzon, MD
Internal Medicine Physician · San Jose, CA
Jose Maria Guanzon Guanzon, MD is an internal medicine physician with a practice address in San Jose, California, and NPI 1134150881, issued on Jul 5, 2006. Check the license (California A46670, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jose Maria Guanzon Guanzon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A46670 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2395 Montpelier Dr, San Jose, CA 95116
- Phone
- (408) 272-3041
- Enumerated
- Jul 5, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (408) 272-3068
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2395 Montpelier Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Teresita Guanzon, MDInternal Medicine Physician1306877055
- Di Tran, M.D.Pediatrics Physician1619965670
Verify Jose Maria Guanzon Guanzon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A46670Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
609 Medicare Part D claims for 104 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Amlodipine Besylate54 claims
- Atorvastatin Calcium47 claims
- Pioglitazone Hcl31 claims
- Rosuvastatin Calcium29 claims
- Jardiance26 claims
- Losartan Potassium23 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: $2,687.74
66 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Jose Maria Guanzon Guanzon among 17,696 internal medicine physician records in California
Jose Maria Guanzon Guanzon, 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 updated2007 · 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).
428 internal medicine physician records list a practice address in San Jose
They are 428 of the 20,925 NPPES records with a practice address in San Jose, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Jose → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Komal Bhatt, MDSan Jose, CA 951161003824699
- Richard Cathey, M.D.San Jose, CA 951161750343323
- Dinh Dam, M.D.San Jose, CA 951161518936616
- Jaco Fishenfeld, MDSan Jose, CA 951161689639577
- Teresita Guanzon, MDSan Jose, CA 951161306877055
- Dwight Lim, MDSan Jose, CA 951161124084561
- Syed Majid, MD, FRCP, FASAMSan Jose, CA 951161225009533
- Vinh Nguyen, M.D.San Jose, CA 951161720086556
Common questions
What is Jose Maria Guanzon Guanzon, MD's NPI number?
Jose Maria Guanzon Guanzon, MD's National Provider Identifier (NPI) is 1134150881, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jose Maria Guanzon Guanzon, MD located?
The NPPES record lists a practice address at 2395 Montpelier Dr, San Jose, CA, 95116. Phone: (408) 272-3041. Providers update this record themselves, so call before visiting.
How can I verify Jose Maria Guanzon Guanzon, MD's license?
NPPES lists California license number A46670, 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 Jose Maria Guanzon Guanzon, MD prescribe under Medicare Part D?
In 2024, Jose Maria Guanzon Guanzon, MD had 609 Medicare Part D claims for 104 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.