Dr. Marissa Dennis is a Boston, Massachusetts based psychologist who is specialized in Clinical Psychology. Active license number of Dr. Marissa Dennis is PSY10001753 for Clinical Psychology in Massachusetts. Her current practice location is 300 Longwood Ave, Boston. Patients can reach her at 617-355-6000. Dr. Marissa Dennis is PHD in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1841999067.
Dr. Marissa Dennis is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.
Complete Profile:
Dr. Marissa Dennis speciality, credentials, practice address, contact phone number and fax are as below.
Patients can call on the below given phone number for appointment.
| Name: | Dr. Marissa Dennis |
| Specialization: | Clinical Psychology |
| Gender: | Female |
| Credentials: | PHD |
| Practice Address: | 300 Longwood Ave, Boston,
Massachusetts, 02115-5724 |
| Phone: | 617-355-6000 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| NPI Number: | 1841999067 |
| NPI Enumeration Date: | 27 Feb, 2023 |
| NPI Last Update On: | 10 Aug, 2026 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Dr. Marissa Dennis are as mentioned below.
| License Number | Specialization | State | Status | |
| PSY10001753 | Clinical Psychology | Massachusetts | Primary | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | Dr. Marissa Dennis
300 Longwood Ave,
Boston, Massachusetts |
| Zip: | 02115-5724 |
| Phone Number: | 617-355-6000 |
Patients can reach Dr. Marissa Dennis at
300 Longwood Ave, Boston, Massachusetts or can
call to book an appointment on 617-355-6000.
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Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.