Anna Zhang, MD
Internal Medicine Physician · Mountain View, CA
Anna Zhang, MD is an internal medicine physician with a practice address in Mountain View, California, and NPI 1174159172, issued on Mar 21, 2020. Check the license (California A178629, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anna Zhang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A178629 CA
Self-reported in NPPES; status is on the state search - Practice location
- 555 Castro St, Mountain View, CA 94041
- Phone
- (650) 903-3000
- Enumerated
- Mar 21, 2020
- Record last updated
- Aug 29, 2023
- Medicare enrollment
- Enrolled (PECOS I20231031004020); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 555 Castro St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Anna Zhang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A178629Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average internal medicine physician in 2024
722 Medicare Part D claims for 184 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium67 claims
- Amlodipine Besylate49 claims
- Lisinopril40 claims
- Losartan Potassium39 claims
- Alendronate Sodium27 claims
- Levothyroxine Sodium26 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
- Permanente Medical Group IncMountain View, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anna Zhang among 17,696 internal medicine physician records in California
Anna 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 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
119 internal medicine physician records list a practice address in Mountain View
They are 119 of the 2,467 NPPES records with a practice address in Mountain View, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Mountain View → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Liteh Chang, MDMountain View, CA 940411255418190
- Arleen Chang, MDMountain View, CA 940411679650501
- Karunasree Cherukuri, MDMountain View, CA 940411831276781
- Sandy Chun, MDMountain View, CA 940411144307083
- Sonali Gotmare, MDMountain View, CA 940411346327285
- George Greenwald, MDMountain View, CA 940411952451767
- Hong Gu, MDMountain View, CA 940411205908027
- Susie Jang, MDMountain View, CA 940411871554022
Common questions
What is Anna Zhang, MD's NPI number?
Anna Zhang, MD's National Provider Identifier (NPI) is 1174159172, issued on Mar 21, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Anna Zhang, MD located?
The NPPES record lists a practice address at 555 Castro St, Mountain View, CA, 94041. Phone: (650) 903-3000. Providers update this record themselves, so call before visiting.
How can I verify Anna Zhang, MD's license?
NPPES lists California license number A178629, 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 Anna Zhang, MD prescribe under Medicare Part D?
In 2024, Anna Zhang, MD had 722 Medicare Part D claims for 184 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.