Annie Bertha-Chao Chern, M.D.
Family Medicine Physician · San Jose, CA
Annie Bertha-Chao Chern, M.D. is a family medicine physician with a practice address in San Jose, California, and NPI 1104051507, issued on May 29, 2009. Check the license (California A107270, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Annie Bertha-Chao Chern
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A107270 CA
Self-reported in NPPES; status is on the state search - Practice location
- 455 Oconnor Dr, San Jose, CA 95128
- Phone
- (408) 995-5453
- Enumerated
- May 29, 2009
- Record last updated
- Feb 3, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110526000144); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 455 Oconnor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maricela Aguaristi, PHYSICIAN ASSISTANTPhysician Assistant1609059062
- Katharine Aldrich, CNMAdvanced Practice Midwife1790806388
- Alexandra Duisberg, MDStudent in an Organized Health Care Education/Training Program1255820635
- Michael Henehan, DOFamily Medicine Physician1053497685
- Robert Hsu, MPAS, PA-CPhysician Assistant1821168832
- Bruce Huffer, MDOrthopaedic Surgery Physician1376581934
Verify Annie Bertha-Chao Chern in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A107270Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average family medicine physician in 2024
770 Medicare Part D claims for 105 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Atorvastatin Calcium110 claims
- Amlodipine Besylate55 claims
- Metformin Hcl36 claims
- Losartan Potassium34 claims
- Levothyroxine Sodium21 claims
- Ozempic20 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
- University Healthcare AllianceSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Annie Bertha-Chao Chern among 17,133 family medicine physician records in California
Annie Bertha-Chao Chern, 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 2009, is newer than 58% of them.
- NPI issued2009 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2007 · median 2005 among the 10,652 with a school on file
- Record last updated2012 · 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
- Madhavi Chenumalla, MDSan Jose, CA 951281225122849
- Michael Henehan, DOSan Jose, CA 951281053497685
- Suneetha Devi Jagarlamudi, M.D.San Jose, CA 951281205862588
- Dhanu Kapoor, M.DSan Jose, CA 951281942212758
- George Kent, MDSan Jose, CA 951281861456246
- Heideh Khalilnejadi, MDSan Jose, CA 951281528022852
- Arnold Leff, MDSan Jose, CA 951281326004730
- Surekha Manohar, MDSan Jose, CA 951281235195900
Common questions
What is Annie Bertha-Chao Chern, M.D.'s NPI number?
Annie Bertha-Chao Chern, M.D.'s National Provider Identifier (NPI) is 1104051507, issued on May 29, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Annie Bertha-Chao Chern, M.D. located?
The NPPES record lists a practice address at 455 Oconnor Dr, San Jose, CA, 95128. Phone: (408) 995-5453. Providers update this record themselves, so call before visiting.
How can I verify Annie Bertha-Chao Chern, M.D.'s license?
NPPES lists California license number A107270, 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 Annie Bertha-Chao Chern, M.D. prescribe under Medicare Part D?
In 2024, Annie Bertha-Chao Chern, M.D. had 770 Medicare Part D claims for 105 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.