Mr. John Diehl is a West Sayville, New York based counselor who is specialized as Mental Health Counselor. Active license number of Mr. John Diehl is 001807-1 for Mental Health Counselor in New York. His current practice location is 131 Cherry Ave, West Sayville. Patients can book an appointment with him at 631-834-5809.
Mr. John Diehl is a licensed professional who helps individuals, couples, and families manage and overcome emotional, psychological, and behavioral challenges. He 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.
Complete Profile:
Mr. John Diehl speciality, credentials, practice address, contact phone number and fax are as below.
Patients can directly walk in or can call on the below given phone number for appointment.
Name:
Mr. John Diehl
Specialization:
Mental Health Counselor
Gender:
Male
Credentials:
MS
Accepts Medicare Assignment:
No
Practice Address:
131 Cherry Ave, West Sayville, New York, 11796-1214
Phone:
631-834-5809
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:
1619187101
NPI Enumeration Date:
23 May, 2007
NPI Last Update On:
08 Jul, 2007
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mr. John Diehl are as mentioned below.
License Number
Specialization
State
Status
001807-1
Mental Health Counselor
New York
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:
131 Cherry Ave, West Sayville, New York
Zip:
11796-1214
Phone Number:
631-834-5809
Patients can reach Mr. John Diehl at 131 Cherry Ave, West Sayville, New York or can call to book an appointment on 631-834-5809. *Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 July, 2025.