Sean Leson, D.O.
Clinical & Laboratory Immunology (Allergy & Immunology) Physician · Garden Grove, CA
Sean Leson, D.O. is a clinical & laboratory immunology (allergy & immunology) physician with a practice address in Garden Grove, California, and NPI 1699733766, issued on May 1, 2006. Check the license (California 20A6461, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sean Leson
- Credential
- D.O.
- Primary taxonomy
- Clinical & Laboratory Immunology (Allergy & Immunology) Physician 207KI0005X
- License number
- 20A6461 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12512 Garden Grove Blvd, Garden Grove, CA 92843
- Phone
- (714) 590-1611
- Enumerated
- May 1, 2006
- Record last updated
- Jan 21, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (714) 590-1641
- Medicare enrollment
- Enrolled (PECOS I20060127000558); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 1989
- Entity
- Type 1 · individual
7 nearest clinical & laboratory immunology (allergy & immunology) physician records → All 8 in California → Look up another NPI →
Verify Sean Leson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6461Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average clinical & laboratory immunology (allergy & immunology) physician in 2024
575 Medicare Part D claims for 22 beneficiaries, against an average of 678 among the 35 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Azelastine Hcl115 claims
- Trelegy Ellipta113 claims
- Montelukast Sodium88 claims
- Flunisolide79 claims
- Roflumilast65 claims
- Levocetirizine Dihydrochloride30 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: $137.75
5 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 33 providers of this specialty with any payment received $3,436.23 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.
Clinical & Laboratory Immunology (Allergy & Immunology) Physician providers in California
There are 8 clinical & laboratory immunology (allergy & immunology) physician records in California.
All 8 in California → Every provider in Garden Grove → Clinical & Laboratory Immunology (Allergy & Immunology) Physician nationwide →
The 7 clinical & laboratory immunology (allergy & immunology) physician records with the nearest ZIP codes
- Alexander Kim, M.D.La Jolla, CA 920931841429404
- Joshua Gibbs, D.O.Rancho Cucamonga, CA 917301427195734
- Alexander Craig, MD, MPHILSan Francisco, CA 941071295311793
- Rita Kachru, M.D.Santa Monica, CA 904041285647487
- Marc Meth, MDLos Angeles, CA 900671508013301
- Jonathan Corren, MDLos Angeles, CA 900251447360086
- Paul Cloninger, M.D.Sacramento, CA 958191114903457
Common questions
What is Sean Leson, D.O.'s NPI number?
Sean Leson, D.O.'s National Provider Identifier (NPI) is 1699733766, issued on May 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sean Leson, D.O. located?
The NPPES record lists a practice address at 12512 Garden Grove Blvd, Garden Grove, CA, 92843. Phone: (714) 590-1611. Providers update this record themselves, so call before visiting.
How can I verify Sean Leson, D.O.'s license?
NPPES lists California license number 20A6461, 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 Leson, D.O. prescribe under Medicare Part D?
In 2024, Sean Leson, D.O. had 575 Medicare Part D claims for 22 beneficiaries; the average among clinical & laboratory immunology (allergy & immunology) physician prescribers was 678. 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.