Chung-Ying Amanda Chen, MD
Internal Medicine Physician · Sunnyvale, CA
Chung-Ying Amanda Chen, MD is an internal medicine physician with a practice address in Sunnyvale, California, and NPI 1457436081, issued on Oct 25, 2006. Check the license (California A94535, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chung-Ying Amanda Chen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A94535 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Old San Francisco RD, Sunnyvale, CA 94086
- Phone
- (408) 730-4262
- Enumerated
- Oct 25, 2006
- Record last updated
- Nov 28, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20061214000494); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 401 Old San Francisco RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patti Allen, M.D.Internal Medicine Physician1659438489
- Leone Baron, PT, DPTPhysical Therapist1538708839
- Priya Bhusri, M.D.Internal Medicine Physician1659386019
- Yeralis Cabrero, PT, DPTPhysical Therapist1639991714
- Rafael Cahill, DPTPhysical Therapist1235742057
- Natalie Chan, DPTPhysical Therapist1619730629
Verify Chung-Ying Amanda Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94535Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
651 Medicare Part D claims for 102 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Atorvastatin Calcium68 claims
- Metformin Hcl49 claims
- Losartan Potassium48 claims
- Hydrochlorothiazide33 claims
- Alendronate Sodium29 claims
- Amlodipine Besylate26 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
- Sutter Bay Medical FoundationLos Gatos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
48 internal medicine physician records list a practice address in Sunnyvale
They are 48 of the 1,690 NPPES records with a practice address in Sunnyvale, and 17,696 internal medicine physician records in California.
All 48 in Sunnyvale → All 17,696 in California → Every provider in Sunnyvale →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Chung-Ying Amanda Chen, MD's NPI number?
Chung-Ying Amanda Chen, MD's National Provider Identifier (NPI) is 1457436081, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chung-Ying Amanda Chen, MD located?
The NPPES record lists a practice address at 401 Old San Francisco RD, Sunnyvale, CA, 94086. Phone: (408) 730-4262. Providers update this record themselves, so call before visiting.
How can I verify Chung-Ying Amanda Chen, MD's license?
NPPES lists California license number A94535, 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 Chung-Ying Amanda Chen, MD prescribe under Medicare Part D?
In 2024, Chung-Ying Amanda Chen, MD had 651 Medicare Part D claims for 102 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.