Psychiatrist | 18+ years experience

Joseph Trettel Jr., MD PHD

221 Longwood Ave, Boston, Massachusetts, 02115-5804

About Joseph Trettel Jr.

Joseph Trettel Jr. is a psychiatrist based in Boston, Massachusetts with 18 years of experience in Psychiatry. He completed his graduation from University Of Connecticut School Of Medicine in 2008. He is also affiliated with hospitals like He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Joseph Trettel Jr. is 050160 for Psychiatry in Connecticut. His current practice location is 221 Longwood Ave, Boston. Patients can contact him at 617-732-6753. Joseph Trettel Jr., MD PHD, specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1750542502.

Joseph Trettel Jr. specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Practice Information

Joseph Trettel Jr.'s specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Joseph Trettel Jr.
Specialization Psychiatry
Credentials MD PHD
Accepts Medicare Assignment Yes
Experience 18+ years
Medical School Attended University Of Connecticut School Of Medicine
Graduation Year 2008
Gender Male
Practice Address: 221 Longwood Ave,
Boston, MA - 02115-5804

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

PAC ID 9032381678
Enrollment ID I20111004000463
NPI Number1750542502
NPI Enumeration Date: 24 Jun, 2008
NPI Last Update On: 09 Aug, 2013

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Joseph Trettel Jr. are as mentioned below.

License NumberSpecializationStateStatus
050160Psychiatry ConnecticutPrimary

Hospital Affiliation

Doctors are affiliated to many hospitals whom they worked with in the past or are presently working with. One doctor can be affiliated to four to five hospitals at a time.
Hospital Name (CCN) StateHospital Type
(070025)Hartford, CTAcute Care Hospital

Group Practice

Group practices are practice of medicine by a group of healthcare professionals who share their premises and other resources. Following list states all the group name with which Joseph Trettel Jr. is associated with along with the number of members in that group.
Organization Name (Group PAC ID) Members
Hartford Hospital (2567366016)703

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Joseph Trettel Jr.
221 Longwood Ave,
Boston, MA - 02115-5804
Phone: 617-732-6753

Book an Appointment with Joseph Trettel Jr.

To schedule an appointment, contact Joseph Trettel Jr. at 221 Longwood Ave, Boston, Massachusetts or call the phone number listed below.

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Frequently Asked Questions

Below are some commonly asked questions about Joseph Trettel Jr.:

Joseph Trettel Jr. is a psychiatrist specializing in Psychiatry. He specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Joseph Trettel Jr. completed his education (MD PHD) from University Of Connecticut School Of Medicine in 2008.

Joseph Trettel Jr. has approximately 18 years of experience in Psychiatry.

Yes, Joseph Trettel Jr. accepts Medicare assignment, meaning the provider participates in Medicare and accepts Medicare-approved amounts for eligible services.

Yes, Joseph Trettel Jr. is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Joseph Trettel Jr. practices at 221 Longwood Ave, Boston, Massachusetts, 02115-5804.

To schedule an appointment with Joseph Trettel Jr., please contact the office at 617-732-6753.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.