Gary Slesing Feigenbaum, MD
Hospitalist Physician · Santa Monica, CA
Gary Slesing Feigenbaum, MD is a hospitalist physician with a practice address in Santa Monica, California, and NPI 1558604256, issued on Apr 1, 2013. Check the license (California A133392, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary Slesing Feigenbaum
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A133392 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1250 16TH St, Santa Monica, CA 90404
- Phone
- (310) 319-4698
- Enumerated
- Apr 1, 2013
- Record last updated
- Feb 21, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (310) 206-3260
- Medicare enrollment
- Enrolled (PECOS I20160916002251); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 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.
- Melanie Altamirano-CariagaNurse Practitioner1588060198
- Miguel Arellano, NPNurse Practitioner1295460806
- Jason Bahk, M.D.Hospitalist Physician1245573187
- Christopher BelfourEmergency Medicine Physician1518259837
- Umesh Bhagia, MDSurgery Physician1568468528
- Cassandra Blaylock, NPHematology & Oncology Physician1588043400
Verify Gary Slesing Feigenbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A133392Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average hospitalist physician in 2024
71 Medicare Part D claims for 32 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary Slesing Feigenbaum among 3,099 hospitalist physician records in California
Gary Slesing Feigenbaum, MD 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 2013, is newer than 56% of them.
- NPI issued2013 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2013 · median 2010 among the 2,505 with a school on file
- Record last updated2017 · 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).
96 hospitalist physician records list a practice address in Santa Monica
They are 96 of the 5,151 NPPES records with a practice address in Santa Monica, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Santa Monica → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Spencer Adams, MDSanta Monica, CA 904041487688198
- Nathan Cox, M.D.Santa Monica, CA 904041912173378
- Erin Dowling, M.D.Santa Monica, CA 904041568645901
- Retha GoodglickSanta Monica, CA 904041396994034
- Adela Greeley, M.D.Santa Monica, CA 904041205968492
- David Kagan, MDSanta Monica, CA 904041992965768
- Russell KerbelSanta Monica, CA 904041164699203
- Mike La, M.D.Santa Monica, CA 904041790949535
Common questions
What is Gary Slesing Feigenbaum, MD's NPI number?
Gary Slesing Feigenbaum, MD's National Provider Identifier (NPI) is 1558604256, issued on Apr 1, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Gary Slesing Feigenbaum, MD located?
The NPPES record lists a practice address at 1250 16TH St, Santa Monica, CA, 90404. Phone: (310) 319-4698. Providers update this record themselves, so call before visiting.
How can I verify Gary Slesing Feigenbaum, MD's license?
NPPES lists California license number A133392, 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 Gary Slesing Feigenbaum, MD prescribe under Medicare Part D?
In 2024, Gary Slesing Feigenbaum, MD had 71 Medicare Part D claims for 32 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Gary Slesing Feigenbaum, MD's MIPS final score?
The 2023 MIPS final score is 86.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.