An Ngoc To, M.D.
Family Medicine Physician · San Jose, CA
An Ngoc To, M.D. is a family medicine physician with a practice address in San Jose, California, and NPI 1972528016, issued on Jul 12, 2006. Check the license (California A36399, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- An Ngoc To
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A36399 CA
Self-reported in NPPES; status is on the state search - Practice location
- 87 N 6TH St, San Jose, CA 95112
- Phone
- (408) 279-1180
- Enumerated
- Jul 12, 2006
- Record last updated
- Feb 7, 2023
- Fax
- (408) 279-6745
- Medicaid ID
- 4805916 CA
- Medicare enrollment
- Enrolled (PECOS I20090506000069); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 87 N 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tri Dam, NURSE PRACTITIONERFamily Nurse Practitioner1649864604
- Rick To, M.D.Family Medicine Physician1194756858
Verify An Ngoc To in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A36399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 77% of the cost of the top drugs
1,427 Medicare Part D claims for 299 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Amlodipine Besylate104 claims
- Losartan Potassium104 claims
- Atorvastatin Calcium101 claims
- Shingrix60 claims
- Metformin Hcl55 claims
- Alendronate Sodium54 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: $300.58
9 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Bills Medicare through one group practice
- AN Ngoc TO MD IncSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
An Ngoc To among 17,133 family medicine physician records in California
An Ngoc To, M.D. 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 fileYes · 62% of these records are
- Graduated1967 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 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
- Viet-Hong Bui, D.O.San Jose, CA 951121407830185
- Rau Bui, MDSan Jose, CA 951121891808804
- Joseph CherianSan Jose, CA 951121881947414
- Michelle Dinh, MDSan Jose, CA 951121609800960
- Andrea Tram Anh Huynh, MDSan Jose, CA 951121669056040
- Meeta Kohli, M.D.San Jose, CA 951121184634875
- Carmen Meza-Rocha, M.D.San Jose, CA 951121316977937
- Navjot Minhas, MDSan Jose, CA 951121720615529
Common questions
What is An Ngoc To, M.D.'s NPI number?
An Ngoc To, M.D.'s National Provider Identifier (NPI) is 1972528016, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is An Ngoc To, M.D. located?
The NPPES record lists a practice address at 87 N 6TH St, San Jose, CA, 95112. Phone: (408) 279-1180. Providers update this record themselves, so call before visiting.
How can I verify An Ngoc To, M.D.'s license?
NPPES lists California license number A36399, 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 An Ngoc To, M.D. prescribe under Medicare Part D?
In 2024, An Ngoc To, M.D. had 1,427 Medicare Part D claims for 299 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.