Leonard Norman Lewenstein, M.D.
Anesthesiology Physician · Santa Monica, CA
Leonard Norman Lewenstein, M.D. is an anesthesiology physician with a practice address in Santa Monica, California, and NPI 1558439687, issued on Nov 30, 2006. Check the license (California C37173, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leonard Norman Lewenstein
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- C37173 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1250 16TH St, Santa Monica, CA 90404
- Phone
- (310) 319-4000
- Enumerated
- Nov 30, 2006
- Record last updated
- Mar 24, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (310) 319-4137
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 1250 16TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Miguel Arellano, NPNurse Practitioner1295460806
- Jason Bahk, M.D.Hospitalist Physician1245573187
- Christopher BelfourEmergency Medicine Physician1518259837
- Umesh Bhagia, MDSurgery Physician1568468528
- Cassandra Blaylock, NPHematology & Oncology Physician1588043400
Verify Leonard Norman Lewenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C37173Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average anesthesiology physician in 2024
14 Medicare Part D claims, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Leonard Norman Lewenstein among 7,571 anesthesiology physician records in California
Leonard Norman Lewenstein, M.D. is one of 7,571 anesthesiology physician records with a practice address in California. 71% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 53% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in California
There are 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Santa Monica → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Laura Alexander, MDSanta Monica, CA 904041699763094
- Sophie Andriaschuk, M.D.Santa Monica, CA 904041063421378
- Thomas Bohlmann, M.D.Santa Monica, CA 904041265448195
- Grace Chang, MDSanta Monica, CA 904041720024789
- James Cowman, M.D.Santa Monica, CA 904041770696510
- George Herr, M.D.Santa Monica, CA 904041578575395
- Eric Hsu, MDSanta Monica, CA 904041972537835
- Roger Mah, M.D.Santa Monica, CA 904041477564185
Common questions
What is Leonard Norman Lewenstein, M.D.'s NPI number?
Leonard Norman Lewenstein, M.D.'s National Provider Identifier (NPI) is 1558439687, issued on Nov 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Norman Lewenstein, M.D. located?
The NPPES record lists a practice address at 1250 16TH St, Santa Monica, CA, 90404. Phone: (310) 319-4000. Providers update this record themselves, so call before visiting.
How can I verify Leonard Norman Lewenstein, M.D.'s license?
NPPES lists California license number C37173, 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 Leonard Norman Lewenstein, M.D. prescribe under Medicare Part D?
In 2024, Leonard Norman Lewenstein, M.D. had 14 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.