Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. Mark Riley Jonker, MD

Individual provider Internal Medicine Physician · NPI 1780030452

Mr. Mark Riley Jonker, MD is an Internal Medicine in Hartford, Connecticut. Qualified in 2016, 10 years ago. Practices with Middlesex Hospital, a 229-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
10
Licensed in
CT
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

79 Retreat Avenue Hartford Hospital Adult Primary Care- Brown Stone
Hartford, CT 06106
Phone: (860) 972-0200
Fax: (860) 545-3149
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 64205 (CT)

Record details

NPI number1780030452
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 11, 2016
Last updated in NPPESJune 3, 2020
Certification dateJune 3, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Middlesex Hospital — 229 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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