ELLEN DAYON MD
NPI 1043279359
Internal Medicine - Geriatric Medicine in Seal Beach, CA
About Ellen Dayon Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELLEN DAYON MD (NPI 1043279359) is an individual geriatric medicine provider in Seal Beach, California, licensed in California (A53403) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1982).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ellen Dayon Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Ellen Dayon reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Alamitos, CA 90720
- Reassigned Medicare billing, California enrollment
- 228 clinicians in this Medicare group
Tustin, CA 92780
- Reassigned Medicare billing, California enrollment
- 2,052 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90740 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SEAL BEACH, CA 90740
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ellen Dayon's NPI number?
The NPI number for Ellen Dayon is 1043279359. It was assigned to this individual provider in the NPPES registry on March 23, 2006.
Where is Ellen Dayon located?
Ellen Dayon practices at 1661 Golden Rain Rd, Seal Beach, CA 90740. The listed phone number is (562) 493-9581.
What is Ellen Dayon's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Ellen Dayon enrolled in Medicare?
Yes. Ellen Dayon is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Ellen Dayon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Dayon reassigns Medicare benefits to 2 organizations: Centers For Family Medicine Gp (Los Alamitos, CA) and Healthcare Partners Affiliates Medical Group (Tustin, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ellen Dayon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Ellen Dayon was last updated on November 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ellen Dayon, MD · NPI 1043279359
Geriatric Medicine physician in Seal Beach, California. Individual provider, active in the CMS NPPES registry since March 23, 2006.
## Identity
- **NPI:** 1043279359 (Entity type: Individual)
- **Enumerated:** March 23, 2006
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **State license:** A53403 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1661 GOLDEN RAIN RD, Seal Beach, CA 90740-4907
- **Phone:** (562) 493-9581
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Centers For Family Medicine Gp (NPI 1467598243, Los Alamitos, CA); Healthcare Partners Affiliates Medical Group (NPI 1891981502, Tustin, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1982
## Record status
- **NPPES last updated:** November 15, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1043279359) · Data from the CMS NPPES public registry.