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

Individual provider Psychiatry Physician · NPI 1750542502

Joseph Trettel Jr., MDPHD practises Neuropsychiatry in Boston, Massachusetts. Graduated from University of Connecticut School of Medicine in 2008, 18 years ago. Practices with Hartford Hospital, a 1,040-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
18
Trained at
University of Connecticut School of Medicine
Licensed in
CT
In the registry since
2008
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Practice location Address checks out

221 Longwood Ave
Boston, MA 02115-5804 Not confirmed with CMS for 13 years — call before visiting
Phone: (617) 732-6753
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 050160 (CT)

Record details

NPI number1750542502
Entity typeIndividual (Type 1)
GenderMale
Credentials MDPHD
Sole proprietorNo
NPI enumeratedJune 24, 2008
Last updated in NPPESAugust 9, 2013

Medicare enrollment

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

Medicare specialtyNEUROPSYCHIATRY
Also practisesPSYCHIATRY
Medical schoolUNIVERSITY OF CONNECTICUT SCHOOL OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Hartford Hospital — 1040 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations23 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients43
Services billed 211 a service is one billed item, such as a visit, a test or a procedure
Average patient age64

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Hartford Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1040 clinicians in the practice; 12 are shown here.

Other providers in Boston