Continuing your care with Dr. Dayon...

When you choose your doctor through Monarch HealthCare, a part of OptumCareTM,
you also get the added experience that comes with over 20 years of caring for seniors and families.

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Ellen Dayon, MD
Internal Medicine
OptumCare Medical Group

13930 Seal Beach Blvd
Seal Beach, CA 90740
(562) 430-8888
Monday - Friday 8am - 5pm

Philosophy Of Care:
I truly value the partnership and trust that I’ve developed with each of my patients. I strive to provide each patient with accurate information about their condition or diagnosis and together agree on the best treatment plan that meets their individual health care needs. The end result is a personalized treatment plan that balances the most advanced, evidence-based treatments with the patient’s wants, needs, and preferences.

Accepted Health Insurances:
HMO, POS, PPO, Original Medicare and Medicare Advantage

Dr. Dayon attended medical school in St. Petersburg, Russia, and completed residency in endocrinology with additional studies at the State Institute of Advanced Medical Training. Her U.S. internship and residency was at the University of Southern California.

Board Certification:
She is board certified in internal medicine.

Languages - Physician: English, Russian

To select Dr. Dayon as your primary care physician:

Please contact Member Services at your health plan and give them the Provider Identification number listed below.

Plan Phone Number Provider ID Number
Aetna 877-402-8742 628574
Anthem Blue Cross 800-338-1116 Pending
Cigna 800-244-6224 Pending
Health Net 800-638-3889 Pending
UnitedHealthcare West 800-624-8822 Pending
Medi-Cal Phone Number Provider ID Number
CalOptima 877-412-2734 N/A
Medicare Advantage Phone Number Provider ID Number
Aetna 800-282-5366 628574
Anthem Blue Cross 888-230-7338 Pending
Health Net 800-275-4737 Pending
Humana 800-457-4708 Pending
OneCare & OneCare Connect 877-412-2734 00A534030Q39
SCAN Health Plan 800-559-3500 21753 /(Group #823)
UnitedHealthcare 877-517-5276 Pending
Not sure if your health plan is accepted by Dr. Dayon’s office?
Please call us at 888-346-2810 for assistance.