Aaron Shanker, M.D.
Hospitalist Physician · San Francisco, CA
Aaron Shanker, M.D. is a hospitalist physician with a practice address in San Francisco, California, and NPI 1457884983, issued on Apr 11, 2017. Check the license (California A180300, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aaron Shanker
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A180300 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Van Ness Ave, San Francisco, CA 94109
- Phone
- (415) 600-3458
- Enumerated
- Apr 11, 2017
- Record last updated
- Jan 17, 2023
- Fax
- (510) 600-7020
- Medicare enrollment
- Enrolled (PECOS I20230210000253); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1100 Van Ness Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ginny BaoEndocrinology, Diabetes & Metabolism Physician1801383286
Verify Aaron Shanker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A180300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average hospitalist physician in 2024
257 Medicare Part D claims for 118 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Furosemide21 claims
- Pantoprazole Sodium17 claims
- Potassium Chloride14 claims
- Oxycodone Hcl13 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 FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Shanker among 3,099 hospitalist physician records in California
Aaron Shanker, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 74% of them.
- NPI issued2017 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2016 · median 2010 among the 2,505 with a school on file
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in San Francisco → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Jeannie Brewer, MDSan Francisco, CA 941091609898345
- Robert Eldabaje, MDSan Francisco, CA 941091609211176
- Jeffrey FrankSan Francisco, CA 941091639128895
- Hanley Ma, M.D.San Francisco, CA 941091609191006
- Joseph Mallon, MDSan Francisco, CA 941091407041197
- Robert Matz, M.D.San Francisco, CA 941091558503086
- Michael McCarthy, M.D./PH.D.San Francisco, CA 941091982616553
- Jaclyn McGowan, MDSan Francisco, CA 941091629230495
Common questions
What is Aaron Shanker, M.D.'s NPI number?
Aaron Shanker, M.D.'s National Provider Identifier (NPI) is 1457884983, issued on Apr 11, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Shanker, M.D. located?
The NPPES record lists a practice address at 1100 Van Ness Ave, San Francisco, CA, 94109. Phone: (415) 600-3458. Providers update this record themselves, so call before visiting.
How can I verify Aaron Shanker, M.D.'s license?
NPPES lists California license number A180300, 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 Aaron Shanker, M.D. prescribe under Medicare Part D?
In 2024, Aaron Shanker, M.D. had 257 Medicare Part D claims for 118 beneficiaries; the average among hospitalist physician prescribers was 521. 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.