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

Theodore R Hartenstein, MD

Individual provider Hospitalist Physician · NPI 1225256308

Theodore R Hartenstein, MD is a Hospitalist in Hartford, Connecticut. Graduated from University of Massachusetts Medical School in 2006, 20 years ago. Practices with Middlesex Hospital, a 229-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
20
Trained at
University of Massachusetts Medical School
Licensed in
CT
In the registry since
2007
Specialties on file
2
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

114 Woodland St Dept OF Medicine
Hartford, CT 06105-1208
Phone: (860) 714-7446
Fax: (860) 714-1508
Show map & directions

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

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 49573 (CT)
Internal Medicine Physician Taxonomy 207R00000X · Licence 49573 (CT)

Record details

NPI number1225256308
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 23, 2007
Last updated in NPPESMarch 16, 2012

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 2006 (20 years in practice)
Group practice Middlesex Hospital — 229 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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