Emily Rebecca Wistar, MD
Internal Medicine Physician · San Francisco, CA
Emily Rebecca Wistar, MD is an internal medicine physician with a practice address in San Francisco, California, and NPI 1063774883, issued on Jun 8, 2012. Check the license (California A128587, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Emily Rebecca Wistar
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A128587 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1001 Potrero Avenue, San Francisco, CA 94143
- Phone
- (415) 206-5164
- Enumerated
- Jun 8, 2012
- Record last updated
- Mar 29, 2017 (not updated in 9 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1001 Potrero Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sunita HiraniOccupational Medicine Physician1306173992
Verify Emily Rebecca Wistar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128587Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,004 Medicare Part D claims for 142 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 145 claims were for opioids.
Most prescribed
- Atorvastatin Calcium174 claims
- Amlodipine Besylate83 claims
- Gabapentin79 claims
- Losartan Potassium58 claims
- Oxycodone Hcl51 claims
- Metoprolol Succinate50 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.
Emily Rebecca Wistar among 17,696 internal medicine physician records in California
Emily Rebecca Wistar, 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 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2017 · 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).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
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- Bernard Lo, MDSan Francisco, CA 941431184688137
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- Andrew Posselt, MDSan Francisco, CA 941431235193616
Common questions
What is Emily Rebecca Wistar, MD's NPI number?
Emily Rebecca Wistar, MD's National Provider Identifier (NPI) is 1063774883, issued on Jun 8, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Emily Rebecca Wistar, MD located?
The NPPES record lists a practice address at 1001 Potrero Avenue, San Francisco, CA, 94143. Phone: (415) 206-5164. Providers update this record themselves, so call before visiting.
How can I verify Emily Rebecca Wistar, MD's license?
NPPES lists California license number A128587, 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 Emily Rebecca Wistar, MD prescribe under Medicare Part D?
In 2024, Emily Rebecca Wistar, MD had 2,004 Medicare Part D claims for 142 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.