Ellyn Ashida, MD
Allergy & Immunology Physician · Torrance, CA
Ellyn Ashida, MD is an allergy & immunology physician with a practice address in Torrance, California, and NPI 1245201516, issued on Jan 27, 2006. Check the license (California C40034, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ellyn Ashida
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- C40034 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4201 Torrance Blvd, Torrance, CA 90503
- Phone
- (310) 944-9098
- Enumerated
- Jan 27, 2006
- Entity
- Type 1 · individual
Also registered at 4201 Torrance Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ellyn Ashida in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C40034Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
20% more Medicare Part D claims than the average allergy & immunology physician in 2024
887 Medicare Part D claims for 179 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Montelukast Sodium97 claims
- Fluticasone Propionate75 claims
- Azelastine Hcl74 claims
- Albuterol Sulfate Hfa63 claims
- Xolair49 claims
- Levocetirizine Dihydrochloride46 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: $521.76
28 payments, mostly food and beverage; the largest payer was Genzyme Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 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.
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
Other allergy & immunology physician records in California
- Edsel Abud, MD, PHDLa Jolla, CA1891257192
- Seema Aceves, M.D., PH.D.San Diego, CA1366511628
- Terrie Ahn, MDSanta Monica, CA1093166795
- Rhonda Alkatib, M.D.San Diego, CA1417363086
- Mercedes Amado, M.D.San Diego, CA1477510287
- Loula Amin, M.D.Newport Beach, CA1043452782
- A Aminian, M.D.Fresno, CA1508080193
- Ali Amirzadeh, M.D.Sacramento, CA1083748685
- Lorraine Anderson, MDSanta Monica, CA1013209568
- Joshua Ang, DOPasadena, CA1699398016
Common questions
What is Ellyn Ashida, MD's NPI number?
Ellyn Ashida, MD's National Provider Identifier (NPI) is 1245201516, issued on Jan 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ellyn Ashida, MD located?
The NPPES record lists a practice address at 4201 Torrance Blvd, Torrance, CA, 90503. Phone: (310) 944-9098. Providers update this record themselves, so call before visiting.
How can I verify Ellyn Ashida, MD's license?
NPPES lists California license number C40034, 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 Ellyn Ashida, MD prescribe under Medicare Part D?
In 2024, Ellyn Ashida, MD had 887 Medicare Part D claims for 179 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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) 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 27, 2026.