Psychiatrist | Addiction Psychiatry

Grace Hennessy, M.D.

423 E 23rd St, 11m, New York, New York, 10010-5011

About Grace Hennessy

Grace Hennessy is a psychiatrist based in New York, New York who is specialized in Addiction Psychiatry. Active license number of Grace Hennessy is 229548 for Addiction Psychiatry in New York. Her current practice location is 423 E 23rd St, 11m, New York. Patients can contact her at 212-686-7500. Grace Hennessy, M.D., specializes in Addiction Psychiatry and her NPI number (Unique professional ID assigned by NPPES) is 1518910975.

Grace Hennessy focuses on evaluation and treatment of individuals with alcohol, drug, or other substance-related disorders, and of individuals with dual diagnosis of substance-related and other psychiatric disorders.

Practice Information

Grace Hennessy'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 Grace Hennessy
Specialization Addiction Psychiatry
Credentials M.D.
Gender Female
Practice Address: 423 E 23rd St, 11m
New York, NY - 10010-5011

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 Number1518910975
NPI Enumeration Date: 18 May, 2006
NPI Last Update On: 08 Jul, 2007

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 Grace Hennessy are as mentioned below.

License NumberSpecializationStateStatus
229548Addiction Psychiatry 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.

Grace Hennessy
321 W 54th St, Apartment 614
New York, NY - 10019-5165
Phone: 212-262-4804

Book an Appointment with Grace Hennessy

To schedule an appointment, contact Grace Hennessy at 423 E 23rd St, 11m, New York, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Grace Hennessy:

Grace Hennessy is a psychiatrist specializing in Addiction Psychiatry. She focuses on evaluation and treatment of individuals with alcohol, drug, or other substance-related disorders, and of individuals with dual diagnosis of substance-related and other psychiatric disorders.

Yes, Grace Hennessy 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.

Grace Hennessy practices at 423 E 23rd St, 11m, New York, New York, 10010-5011.

To schedule an appointment with Grace Hennessy, please contact the office at 212-686-7500.

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