Psychologist | General Psychology

Mary Donnelly, PH.D.

3800 Denfeld Ave, Kensington, Maryland, 20895-1603

About Mary Donnelly

Mary Donnelly is a psychologist based in Kensington, Maryland who is specialized in General Psychology. Active license number of Mary Donnelly is 1829 for General Psychology in District Of Columbia. Her current practice location is 3800 Denfeld Ave, Kensington. Patients can contact her at 301-933-8146 or can fax her at 202-508-1795. Mary Donnelly, PH.D., specializes in General Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1932223393.

Mary Donnelly is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Practice Information

Mary Donnelly'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 Mary Donnelly
Specialization General Psychology
Credentials PH.D.
Gender Female
Practice Address: 3800 Denfeld Ave,
Kensington, MD - 20895-1603
Fax 202-508-1795

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.

NPI Number1932223393
NPI Enumeration Date: 19 Mar, 2007
NPI Last Update On: 11 Sep, 2025

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 Mary Donnelly are as mentioned below.

License NumberSpecializationStateStatus
1829General Psychology District Of ColumbiaPrimary
1862General Psychology MarylandSecondary
1854Clinical Psychology VirginiaSecondary

Mailing Address

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

Mary Donnelly
3800 Denfeld Ave,
Kensington, MD - 20895-1603
Fax: 202-508-1795

Book an Appointment with Mary Donnelly

To schedule an appointment, contact Mary Donnelly at 3800 Denfeld Ave, Kensington, Maryland or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Mary Donnelly:

Mary Donnelly is a psychologist specializing in General Psychology. She is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Yes, Mary Donnelly 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.

Mary Donnelly practices at 3800 Denfeld Ave, Kensington, Maryland, 20895-1603.

To schedule an appointment with Mary Donnelly, please contact the office at 301-933-8146.

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