Summary

Dr. Jonathan Fillmore specializes in endocrinology, diabetes, and metabolism, bringing nearly three decades of medical expertise to patient care. He earned his medical degree from Weill Cornell Medical College and completed his residency training at Yale University School of Medicine. With 29 years of experience treating complex hormonal and metabolic conditions, Dr. Fillmore has developed particular expertise in diabetes management across different age groups. He provides care in both English and Spanish to serve diverse patient populations.

Dr. Fillmore practices at Saint Vincents Medical Center and Yale New Haven Hospital, with locations in Middlebury, New Haven, and Bridgeport, Connecticut. He focuses on managing type 2 diabetes in adults and provides specialized care for children and teenagers with diabetes. His expertise extends to treating diabetes in older adults, addressing the unique challenges this population faces. Common procedures include complete blood counts, A1c testing to monitor blood sugar control, and heel stick tests for blood sampling. Patients rate Dr. Fillmore 4.0 out of 5 stars for his comprehensive approach to endocrine care.
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Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4
  • 29 years of experience
  • speaks English, Spanish
  • Yale University School Of Medicine
  • 17 written reviews
  • 1 specialty
  • 16 areas of expertise
  • 2 hospital affiliations
  • 3 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Jonathan James Fillmore has 3 locations

Alliance Medical Group Middlebury

1625 Straits TpkeMiddlebury, CT 06762
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Yale New Haven Hospital

20 York StNew Haven, CT 06510

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Dr. Jonathan James Fillmore, MD
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Dr. Jonathan James Fillmore, MDDr. Dudley Taylor WatkinsDr. Thomas Andrew FroeschDr. Stuart Howard Kreisman
Endocrinology, Diabetes & MetabolismEndocrinology, Diabetes & MetabolismEndocrinology, Diabetes & MetabolismEndocrinology, Diabetes & Metabolism
Accepts New Patients
29 Years of Experience 60 Years of Experience 45 Years of Experience 34 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish
Middlebury , CTFarmington , CTFarmington , CTFarmington , CT
Med School: Weill Cornell Medical College Med School: Case Western Reserve University School Of Medicine Med School: Universitaet Zuerich Medizinische Fakultaet Med School: Mc Gill Univ Fac Of Med
Current Profile
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Insurance Plans Accepted by Dr. Jonathan James Fillmore

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. Jonathan James Fillmore has the following specialty

Specialty Expertise

Dr. Jonathan James Fillmore has the following 16 areas of expertise

  • Acromegaly
  • Addison Disease
  • Bone Densitometry
  • Cushing Disease
  • Diabetes
  • Diabetes (Types I & II)
  • Diabetes Mellitus, Type 1
  • Endocrinology
  • Fatigue
  • Gland Issues
  • Hormones
  • Hyperthyroidism
  • Hypopituitarism
  • Hypothyroidism
  • Insulin Resistance
  • Polycystic Ovary Syndrome (PCOS)

Certifications, License, & Education

29 Years Experience

Dr. Jonathan James Fillmore holds an expired medical license in the state of Connecticut.

Medical License

Medical Doctor with an expired medical license in the state of Connecticut that expired in 2026.

Education & Training

Residency

Completed their residency at Yale University School Of Medicine.

Medical School

Graduated from Weill Cornell Medical College in 1997.

NPI Number

Dr. Fillmore's NPI number is 1578592713.

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Frequently Asked Questions

Which hospitals is Dr. Jonathan Fillmore affiliated with?
Dr. Jonathan Fillmore is affiliated with Saint Vincents Medical Center and Yale New Haven Hospital.
Does Dr. Jonathan Fillmore accept virtual/telehealth appointments?
Dr. Jonathan Fillmore has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Jonathan Fillmore's office located?
Dr. Jonathan Fillmore's office is located at 1625 Straits Tpke, Middlebury, CT, 06762.
Does Dr. Jonathan Fillmore accept my insurance?
You can see the insurance plans that Dr. Jonathan Fillmore accepts on their Vitals profile.
What languages does Dr. Jonathan Fillmore speak?
Dr. Jonathan Fillmore speaks English and Spanish.

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