Psychology Clinic | Clinical Psychology

Dr. Fred Krellenstein, Psychologist, P.c.

8 Holly Dr, Syosset, New York, 11791-5718

About Dr. Fred Krellenstein, Psychologist, P.c.

Dr. Fred Krellenstein, Psychologist, P.c. is a psychology clinic located in Syosset, New York specializing in Clinical Psychology. The clinic is located at 8 Holly Dr, Syosset, can be reached at 516-921-3943. The authorized official for Dr. Fred Krellenstein, Psychologist, P.c. is Dr. Fred Krellenstein, who serves as a President of the clinic and his/her contact number is 516-921-3943.

Dr. Fred Krellenstein, Psychologist, P.c. Clinic has mental health professionals specialized in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Psychologists main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that psychologists can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Clinic Information

Dr. Fred Krellenstein, Psychologist, P.c. Clinic's specialty, address, contact phone number and fax are as below. Patients can contact the clinic at the given phone number for appointments.

Clinic Name Dr. Fred Krellenstein, Psychologist, P.c.
Specialization Clinical Psychology
Practice Address 8 Holly Dr,
Syosset, NY - 11791-5718
Fax 516-682-8210

Authorized/Official Person Profile:

Officially authorized person to contact for any management issues or complaints for this clinic are as below. Person's position and contact details are also mentioned below.

Name Dr. Fred Krellenstein
Position President
Contact Number 516-921-3943

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 Number1215293709
NPI Enumeration Date: 09 Apr, 2012
NPI Last Update On: 17 Jul, 2013

Medical Licenses:

Organizations can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Dr. Fred Krellenstein, Psychologist, P.c. are as mentioned below.
License NumberSpecializationStateStatus
Clinical Primary

Other Medical Identifiers

Other professional identifiers associated with Dr. Fred Krellenstein, Psychologist, P.c. such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
00872835MedicaidNew York

Mailing Address

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

Dr. Fred Krellenstein, Psychologist, P.c.
8 Holly Dr,
Syosset, NY - 11791-5718
Phone: 516-921-3943
Fax: 516-682-8210

Book an Appointment with Dr. Fred Krellenstein, Psychologist, P.c.

To schedule an appointment, contact Dr. Fred Krellenstein, Psychologist, P.c. at 8 Holly Dr, Syosset, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Fred Krellenstein, Psychologist, P.c.:

Dr. Fred Krellenstein, Psychologist, P.c. is a psychology clinic specializing in Clinical Psychology.

Dr. Fred Krellenstein, Psychologist, P.c. is located at 8 Holly Dr, Syosset, New York 11791-5718.

Patients can contact Dr. Fred Krellenstein, Psychologist, P.c. at 516-921-3943 for inquiries about its services and appointments.

Please contact Dr. Fred Krellenstein, Psychologist, P.c. directly to inquire about new-patient availability and appointment options.
* Availability may change.

Dr. Fred Krellenstein, Psychologist, P.c. has mental health professionals specialized in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Psychologists main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that psychologists can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Patients can contact Dr. Fred Krellenstein, Psychologist, P.c. at 516-921-3943 to inquire about appointments, consultation requirements and available services.

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