Jonathan D. Kay
Expertise in
10
conditions

Dr. Jonathan D. Kay

Rheumatology
119 Belmont Street, 
Worcester, MA 
Accepting New Patients
Referral may be required
Before you request
Expertise in
10
conditions
119 Belmont Street, 
Worcester, MA 

Overview

Jonathan Kay is a Rheumatologist practicing medicine in Worcester, Massachusetts.

Dr. Kay is highly rated in 10 conditions, according to our data. His clinical expertise encompasses Rheumatoid Arthritis (RA), Dermatomyositis, Arthritis, Tissue Biopsy, and Prostatectomy.

Dr. Kay is board certified in Internal Medicine and Rheumatology. He is actively involved in clinical research, co-authoring 134 peer reviewed articles and participating in 2 clinical trials. Dr. Kay is currently accepting new patients.

Specialties

Rheumatology

Licenses

Internal Medicine in MA

Board Certifications

Internal Medicine
Rheumatology

Fellowships

Brigham and Women's Hospital

Hospital Affiliations

Umass Memorial Medical Center/university Campus
Umass Memorial Healthalliance Hospitals
Umass Memorial Health - Harrington Hospital

Languages Spoken

English
French

Gender

Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

Find your insurance
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Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem BCBS
  • EPO
  • HMO
  • POS
  • PPO
Blue Cross Blue Shield
  • EPO
  • HMO
  • POS
  • PPO
BMC HealthNet
  • HMO
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE SNP
CareFirst
  • HMO
  • POS
  • PPO
Cigna
  • EPO
  • HMO
  • PPO
Commonwealth Care Alliance
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
Health New England
  • HMO
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • OTHER COMMERCIAL
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Independent Health
  • EPO
  • POS
  • PPO
Managed Medicaid
  • OTHER MANAGED MEDICAID
Mass General Brigham Health Plan
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • PPO
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
Tufts
  • HMO
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
Walgreens
  • MEDICARE DISCOUNT CARD
  • MEDICARE PDP
  • OTHER MEDICARE
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 12 Less Insurance Carriers -

Locations

UMass Memorial Medical Center - Memorial Campus
119 Belmont Street, Worcester, MA 01605

Additional Areas of Focus

Dr. Kay has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.

Ankylosing Spondylitis
Polymyalgia Rheumatica
Psoriatic Arthritis

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.

2 Clinical Trials

A Randomized, Active-Controlled, Parallel-Group, Phase 3b/4 Study of Baricitinib in Patients With Rheumatoid Arthritis
A Randomized, Active-Controlled, Parallel-Group, Phase 3b/4 Study of Baricitinib in Patients With Rheumatoid Arthritis
Enrollment Status: Completed
Publish Date: June 24, 2026
Intervention Type: Drug
Study Drugs: Baricitinib, TNF Inhibitor
Study Phase: Phase 4
Strategy to Prevent the Onset of Clinically-Apparent Rheumatoid Arthritis
Strategy to Prevent the Onset of Clinically-Apparent Rheumatoid Arthritis
Enrollment Status: Terminated
Publish Date: June 12, 2025
Intervention Type: Drug
Study Drug: Hydroxychloroquine
Study Phase: Phase 2
View 1 Less Clinical Trial

134 Total Publications

Longitudinal peripheral blood multi-omic profiling in seropositive individuals identifies immune endotypes and predictive models for future rheumatoid arthritis conversion.
Longitudinal peripheral blood multi-omic profiling in seropositive individuals identifies immune endotypes and predictive models for future rheumatoid arthritis conversion.
Journal: medRxiv : the preprint server for health sciences
Published: February 27, 2026
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Frequently Asked Questions about Dr. Jonathan D. Kay

How do I make an appointment with Dr. Jonathan D. Kay?

You can book an appointment with Dr. Jonathan D. Kay by calling their office at 508-334-5224. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.

Is Dr. Jonathan D. Kay a top-rated expert for Rheumatoid Arthritis (RA)?

MediFind is an objective health platform that identifies experts based on real-world data. Dr. Jonathan D. Kay is classified as an Distinguished expert for Rheumatoid Arthritis (RA), meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.

What conditions does Dr. Jonathan D. Kay specialize in?

While Dr. Jonathan D. Kay is a Rheumatology, they have specific expertise in Rheumatoid Arthritis (RA), Dermatomyositis, and Arthritis. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Rheumatology.

Does Dr. Jonathan D. Kay participate in research or clinical trials?

Yes. Dr. Jonathan D. Kay has published 134 articles and abstracts on conditions like Rheumatoid Arthritis (RA). You can view a list of Dr. Jonathan D. Kay's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.

Does Dr. Jonathan D. Kay accept my insurance?

Dr. Jonathan D. Kay accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 508-334-5224 to verify that your specific plan is currently accepted before your visit.

Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

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