Mental Health Therapist

Diana Clendaniel

340 Veterans Memorial Hwy Ste 12, Commack, New York, 11725-4300

About Diana Clendaniel

Diana Clendaniel is a therapist based in Commack, New York who is specialized in Mental Health Counselor. Active license number of Diana Clendaniel is P139641 for Mental Health Counselor in New York. Her current practice location is 340 Veterans Memorial Hwy Ste 12, Commack. Patients can reach her at 631-319-7678. Diana Clendaniel NPI number (Unique professional ID assigned by NPPES) is 1639015274.

Diana Clendaniel is a licensed professional who helps individuals, couples, and families manage and overcome emotional, psychological, and behavioral challenges. She assess clients’ mental health conditions and develop personalized treatment plans to provide therapy for a range of mental health issues, including anxiety, depression, trauma, relationship issues, stress, grief, and life transitions.

Practice Information

Diana Clendaniel specialty, credentials, practice address, contact phone number and fax are as below. Patients can contact the office at the given phone number for appointment.

Provider Name Diana Clendaniel
Specialization Mental Health Counselor
Gender Female
Practice Address: 340 Veterans Memorial Hwy Ste 12,
Commack, NY - 11725-4300

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 Number1639015274
NPI Enumeration Date: 27 Apr, 2026
NPI Last Update On: 27 Apr, 2026

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 Diana Clendaniel are as mentioned below.

License NumberSpecializationStateStatus
P139641Mental Health Counselor 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.

Diana Clendaniel
93 Herbert St,
Islip, NY - 11751-2018

Book an Appointment with Diana Clendaniel

To schedule an appointment, contact Diana Clendaniel at 340 Veterans Memorial Hwy Ste 12, Commack, New York or call on below stated phone number.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Diana Clendaniel:

Diana Clendaniel is a therapist specializing in Mental Health Counselor. She is a licensed professional who helps individuals, couples, and families manage and overcome emotional, psychological, and behavioral challenges. She assess clients’ mental health conditions and develop personalized treatment plans to provide therapy for a range of mental health issues, including anxiety, depression, trauma, relationship issues, stress, grief, and life transitions.

Yes, Diana Clendaniel 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.

Diana Clendaniel practices at 340 Veterans Memorial Hwy Ste 12, Commack, New York, 11725-4300.

To schedule an appointment with Diana Clendaniel, please contact the office at 631-319-7678.

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