Psychologist | Clinical Psychology

Dr. Donna D Hatziyianis Guarton, PH.D.

18 Mansfield Dr, Massapequa Park, New York, 11762-4034

About Dr. Donna D Hatziyianis Guarton

Dr. Donna D Hatziyianis Guarton is a psychologist based in Massapequa Park, New York who is specialized in Clinical Psychology. Active license number of Dr. Donna D Hatziyianis Guarton is 011485-1 for Clinical Psychology in New York. Her current practice location is 18 Mansfield Dr, Massapequa Park. Patients can contact her at 516-448-0443. Dr. Donna D Hatziyianis Guarton, PH.D., specializes in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1265306385.

Dr. Donna D Hatziyianis Guarton 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.

Practice Information

Dr. Donna D Hatziyianis Guarton'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 Dr. Donna D Hatziyianis Guarton
Specialization Clinical Psychology
Credentials PH.D.
Gender Female
Practice Address: 18 Mansfield Dr,
Massapequa Park, NY - 11762-4034

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 Number1265306385
NPI Enumeration Date: 01 Oct, 2025
NPI Last Update On: 01 Oct, 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 Dr. Donna D Hatziyianis Guarton are as mentioned below.

License NumberSpecializationStateStatus
011485-1Clinical Psychology New YorkPrimary

Mailing Address

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

Dr. Donna D Hatziyianis Guarton
18 Mansfield Dr,
Massapequa Park, NY - 11762-4034
Phone: 544-804-4316

Book an Appointment with Dr. Donna D Hatziyianis Guarton

To schedule an appointment, contact Dr. Donna D Hatziyianis Guarton at 18 Mansfield Dr, Massapequa Park, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Donna D Hatziyianis Guarton:

Dr. Donna D Hatziyianis Guarton is a psychologist specializing in Clinical Psychology. She 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.

Yes, Dr. Donna D Hatziyianis Guarton 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.

Dr. Donna D Hatziyianis Guarton practices at 18 Mansfield Dr, Massapequa Park, New York, 11762-4034.

To schedule an appointment with Dr. Donna D Hatziyianis Guarton, please contact the office at 516-448-0443.

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