Leo Treyzon, M.D.
Gastroenterology Physician · Beverly Hills, CA
Leo Treyzon, M.D. is a gastroenterology physician with a practice address in Beverly Hills, California, and NPI 1740304203, issued on Mar 19, 2007. Check the license (California A81388, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leo Treyzon
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A81388 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9454 Wilshire Blvd Ste 510, Beverly Hills, CA 90212
- Phone
- (310) 688-4141
- Enumerated
- Mar 19, 2007
- Record last updated
- Jan 12, 2024
- Fax
- (424) 488-7156
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 9454 Wilshire Blvd Ste 510
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Basseri, M.D.Gastroenterology Physician1801059647
- Jin-Hwa Simon, M.D.Internal Medicine Physician1023204211
Verify Leo Treyzon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A81388Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average gastroenterology physician in 2024
658 Medicare Part D claims for 177 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Omeprazole92 claims
- Xifaxan74 claims
- Pantoprazole Sodium68 claims
- Dicyclomine Hcl49 claims
- Dexlansoprazole Dr33 claims
- Sucralfate31 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: $3,080.75
141 payments; by number, the most common kind was food and beverage; the largest payer was Salix Pharmaceuticals, a division of Bausch Health US, LLC. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Leo Treyzon among 2,140 gastroenterology physician records in California
Leo Treyzon, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 37% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Beverly Hills → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Benjamin Basseri, M.D.Beverly Hills, CA 902121801059647
- Marc Edelstein, M.D.Beverly Hills, CA 902111669488821
- Jonathan Ellis, MDBeverly Hills, CA 902111306876263
- Katherine Hahn, MDBeverly Hills, CA 902111457697211
- Shahrad Hakimian, M.D.Beverly Hills, CA 902111245625326
- Shahab Mehdizadeh, M.D.Beverly Hills, CA 902111790715241
- Deena Midani, M.D.Beverly Hills, CA 902111902199565
- Robert Mocharla, M.D.Beverly Hills, CA 902111982996633
Common questions
What is Leo Treyzon, M.D.'s NPI number?
Leo Treyzon, M.D.'s National Provider Identifier (NPI) is 1740304203, issued on Mar 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leo Treyzon, M.D. located?
The NPPES record lists a practice address at 9454 Wilshire Blvd Ste 510, Beverly Hills, CA, 90212. Phone: (310) 688-4141. Providers update this record themselves, so call before visiting.
How can I verify Leo Treyzon, M.D.'s license?
NPPES lists California license number A81388, 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 Leo Treyzon, M.D. prescribe under Medicare Part D?
In 2024, Leo Treyzon, M.D. had 658 Medicare Part D claims for 177 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.