Sean Leoni, M.D.
Internal Medicine Physician · Calabasas, CA
Sean Leoni, M.D. is an internal medicine physician with a practice address in Calabasas, California, and NPI 1669544052, issued on Nov 14, 2006. Check the license (California A53547, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sean Leoni
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A53547 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26500 Agoura RD, Calabasas, CA 91302
- Phone
- (888) 254-6600
- Enumerated
- Nov 14, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (818) 788-8343
- Medicare enrollment
- Enrolled (PECOS I20050512000566); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 26500 Agoura RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sean Leoni in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A53547Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
634 Medicare Part D claims for 114 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 39 claims were for opioids.
Most prescribed
- Losartan Potassium42 claims
- Amlodipine Besylate36 claims
- Hydrocodone-Acetaminophen32 claims
- Metoprolol Succinate31 claims
- Mounjaro25 claims
- Amlodipine-Olmesartan22 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.
Industry payments in 2024: $623.16
25 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Sean Leoni among 17,696 internal medicine physician records in California
Sean Leoni, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1993 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
15 internal medicine physician records list a practice address in Calabasas
They are 15 of the 786 NPPES records with a practice address in Calabasas, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Calabasas → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Samuel BursteinCalabasas, CA 913021124037155
- Sagi Cohen, M.D.Calabasas, CA 913021679872311
- Luz Delportillo, M.D.Calabasas, CA 913021760554026
- Sayeh Eshraghi, MDCalabasas, CA 913021750533345
- Keith Garb, M.D.Calabasas, CA 913021740381177
- Wayne Imber, M.D.Calabasas, CA 913021003244518
- Richard Lander, M.D.Calabasas, CA 913021639242241
- Pegah Mehdizadeh, DOCalabasas, CA 913021023101458
Common questions
What is Sean Leoni, M.D.'s NPI number?
Sean Leoni, M.D.'s National Provider Identifier (NPI) is 1669544052, issued on Nov 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sean Leoni, M.D. located?
The NPPES record lists a practice address at 26500 Agoura RD, Calabasas, CA, 91302. Phone: (888) 254-6600. Providers update this record themselves, so call before visiting.
How can I verify Sean Leoni, M.D.'s license?
NPPES lists California license number A53547, 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 Sean Leoni, M.D. prescribe under Medicare Part D?
In 2024, Sean Leoni, M.D. had 634 Medicare Part D claims for 114 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.