Ellen Dayon, MD
Geriatric Medicine (Internal Medicine) Physician · Seal Beach, CA
Ellen Dayon, MD is a geriatric medicine (internal medicine) physician with a practice address in Seal Beach, California, and NPI 1043279359, issued on Mar 23, 2006. Check the license (California A53403, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ellen Dayon
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- A53403 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1661 Golden Rain RD, Seal Beach, CA 90740
- Phone
- (562) 493-9581
- Enumerated
- Mar 23, 2006
- Record last updated
- Nov 15, 2025
- Medicare enrollment
- Enrolled (PECOS I20101118000762); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →
Also registered at 1661 Golden Rain RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Melissa Dassanayake, LCSWMental Health Counselor1679973051
- Rudolf Haider, MDFamily Medicine Physician1740249069
- Jaraad HuqInternal Medicine Physician1275114027
Verify Ellen Dayon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A53403Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
3,753 Medicare Part D claims for 340 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 85 claims were for opioids.
Most prescribed
- Atorvastatin Calcium274 claims
- Levothyroxine Sodium225 claims
- Amlodipine Besylate159 claims
- Lisinopril149 claims
- Losartan Potassium113 claims
- Simvastatin111 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: $149.18
2 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 1,004 providers of this specialty with any payment received $1,720.82 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.
Bills Medicare through 2 group practices
- Centers For Family Medicine GPSeal Beach, CA
- Healthcare Partners Affiliates Medical GroupSeal Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellen Dayon among 532 geriatric medicine (internal medicine) physician records in California
Ellen Dayon, MD is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 46% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated1982 · median 1999 among the 271 with a school on file
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 532 geriatric medicine (internal medicine) physician records in California.
All 532 in California → Every provider in Seal Beach → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Prakash Narain, MDSeal Beach, CA 907401699777292
- Mary Sherman, MDSeal Beach, CA 907401083674709
- Jocelyn Sumcad, M.D.Paramount, CA 907231386732816
- Jacquelyn Vander Wall, M.D.Los Alamitos, CA 907201699807792
- Maurice Turner, MDHarbor City, CA 907101336778877
- Dat Vo, MDBellflower, CA 907061497822407
- Tzong-Yueh Hwang, M.D.Artesia, CA 907011851325211
- Andrew Ralston, M.D.Long Beach, CA 908061295793404
Common questions
What is Ellen Dayon, MD's NPI number?
Ellen Dayon, MD's National Provider Identifier (NPI) is 1043279359, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Dayon, MD located?
The NPPES record lists a practice address at 1661 Golden Rain RD, Seal Beach, CA, 90740. Phone: (562) 493-9581. Providers update this record themselves, so call before visiting.
How can I verify Ellen Dayon, MD's license?
NPPES lists California license number A53403, 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 Ellen Dayon, MD prescribe under Medicare Part D?
In 2024, Ellen Dayon, MD had 3,753 Medicare Part D claims for 340 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.