Jay A. Keystone, M.D.
Jay A. Keystone is an Allergy & Immunology specialist based in Vacaville, CA with over 56 years of clinical experience. Offers virtual telehealth visits.
With over 56 years in internal medicine, Jay a. Keystone, M.D. is a long-established allergy & immunology specialist in Vacaville. He graduated from University of Michigan Medical School in 1970 and has 56+ years of clinical experience. An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders.
Older · 2236dNPPES updated 2020-04-09 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
365 Evergreen Dr, Vacaville, CA 95688-2136
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1970
University of Michigan Medical School
Board certified · Apr 8, 2020
Self-reported via NPPES
56 years in practice
Senior practitioner
An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Special Qualifications in the field of Allergy & Immunology.
Taxonomy: 207RA0201X
Education & Training
University of Michigan Medical School (Class of 1970)
Virtual Allergy & Immunology Care With Jay a. Keystone
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Jay a. Keystone for follow-ups, medication reviews, and ongoing care — no travel to Vacaville required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes.
Frequently Asked Questions
Common questions about Jay a. Keystone
Dr. Keystone is listed as active in the NPI registry with telehealth listed in Vacaville, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (707) 446-8581.
Sourced from CMS NPPES · OIG LEIE. See Data Methodology.
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Contact Jay a. Keystone
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