Psychiatrist

Dr. Alexander Gregers Posell, MD

189 S 9th St Apt 20, Brooklyn, New York, 11211-6159

About Dr. Alexander Gregers Posell

Dr. Alexander Gregers Posell is a psychiatrist based in Brooklyn, New York who is specialized in Psychiatry. Active license number of Dr. Alexander Gregers Posell is 319892 for Psychiatry in New York. His current practice location is 189 S 9th St Apt 20, Brooklyn. Patients can contact him at 213-393-3711. Dr. Alexander Gregers Posell, MD, specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1598384315.

Dr. Alexander Gregers Posell specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Practice Information

Dr. Alexander Gregers Posell'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. Alexander Gregers Posell
Specialization Psychiatry
Credentials MD
Gender Male
Practice Address: 189 S 9th St Apt 20,
Brooklyn, NY - 11211-6159

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 Number1598384315
NPI Enumeration Date: 11 Apr, 2020
NPI Last Update On: 11 Dec, 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. Alexander Gregers Posell are as mentioned below.

License NumberSpecializationStateStatus
319892Psychiatry New YorkPrimary
319892Forensic Psychiatry New YorkSecondary

Other Medical Identifiers

Other professional identifiers associated with Dr. Alexander Gregers Posell such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
07808491MedicaidNew 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. Alexander Gregers Posell
189 S 9th St Apt 20,
Brooklyn, NY - 11211-6159
Phone: 646-397-3017
Fax: 646-585-4389

Book an Appointment with Dr. Alexander Gregers Posell

To schedule an appointment, contact Dr. Alexander Gregers Posell at 189 S 9th St Apt 20, Brooklyn, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Alexander Gregers Posell:

Dr. Alexander Gregers Posell is a psychiatrist specializing in Psychiatry. He specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Yes, Dr. Alexander Gregers Posell 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. Alexander Gregers Posell practices at 189 S 9th St Apt 20, Brooklyn, New York, 11211-6159.

To schedule an appointment with Dr. Alexander Gregers Posell, please contact the office at 213-393-3711.

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