Aaron M. Lewis, MD
Neurology Physician · San Francisco, CA
Aaron M. Lewis, MD is a neurology physician with a practice address in San Francisco, California, and NPI 1255419750, issued on Nov 1, 2006. Check the license (California A78048, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aaron M. Lewis
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A78048 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2200 Ofarrell St, San Francisco, CA 94115
- Phone
- (415) 833-2000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050317001096); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2000
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 2200 Ofarrell St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Aaron M. Lewis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78048Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average neurology physician in 2024
1,360 Medicare Part D claims for 283 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Carbidopa-Levodopa90 claims
- Gabapentin77 claims
- Levetiracetam68 claims
- Donepezil Hcl58 claims
- Clonazepam54 claims
- Propranolol Hcl52 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 IncSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron M. Lewis among 2,339 neurology physician records in California
Aaron M. Lewis, MD is one of 2,339 neurology 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2000 · median 2006 among the 1,628 with a school on file
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in San Francisco → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Sara Doster, M.D.,PH.D.San Francisco, CA 941151467526079
- Kenneth Fox, MDSan Francisco, CA 941151710065370
- Arnold Greenberg, M.D.San Francisco, CA 941151780616177
- Marina Kasavin, M.D., PH.D.San Francisco, CA 941151326015132
- Jonathan Katz, M.D.San Francisco, CA 941151457372823
- Morris Levin, M.D.San Francisco, CA 941151538117403
- Ko-Myong Lieu, MDSan Francisco, CA 941151376513846
- Catherine Madison, M.D.San Francisco, CA 941151952329922
Common questions
What is Aaron M. Lewis, MD's NPI number?
Aaron M. Lewis, MD's National Provider Identifier (NPI) is 1255419750, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Aaron M. Lewis, MD located?
The NPPES record lists a practice address at 2200 Ofarrell St, San Francisco, CA, 94115. Phone: (415) 833-2000. Providers update this record themselves, so call before visiting.
How can I verify Aaron M. Lewis, MD's license?
NPPES lists California license number A78048, 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 M. Lewis, MD prescribe under Medicare Part D?
In 2024, Aaron M. Lewis, MD had 1,360 Medicare Part D claims for 283 beneficiaries; the average among neurology physician prescribers was 1,370. 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.