Psychiatrist | Addiction Psychiatry

Dr. Mark Leonard Katz, M.D.

5901 E 7th St, Mailcode #006/116a - Mental Health Cg, Long Beach, California, 90822-5201

About Dr. Mark Leonard Katz

Dr. Mark Leonard Katz is a psychiatrist based in Long Beach, California who is specialized in Addiction Psychiatry. Active license number of Dr. Mark Leonard Katz is G 62277 for Addiction Psychiatry in California. His current practice location is 5901 E 7th St, Mailcode #006/116a - Mental Health Cg, Long Beach. Patients can contact him at 562-826-8000 or can fax him at 562-826-5431. Dr. Mark Leonard Katz, M.D., specializes in Addiction Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1558478941.

Dr. Mark Leonard Katz 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

Dr. Mark Leonard Katz'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. Mark Leonard Katz
Specialization Addiction Psychiatry
Credentials M.D.
Gender Male
Practice Address: 5901 E 7th St, Mailcode #006/116a - Mental Health Cg
Long Beach, CA - 90822-5201
Fax 562-826-5431

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 Number1558478941
NPI Enumeration Date: 23 Aug, 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 Dr. Mark Leonard Katz are as mentioned below.

License NumberSpecializationStateStatus
G 62277Addiction Psychiatry CaliforniaPrimary

Mailing Address

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

Dr. Mark Leonard Katz
5901 E 7th St, Mailcode #006/116a - Mental Health Cg
Long Beach, CA - 90822-5201
Phone: 562-826-8000
Fax: 562-826-5431

Book an Appointment with Dr. Mark Leonard Katz

To schedule an appointment, contact Dr. Mark Leonard Katz at 5901 E 7th St, Mailcode #006/116a - Mental Health Cg, Long Beach, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Mark Leonard Katz:

Dr. Mark Leonard Katz is a psychiatrist specializing in Addiction Psychiatry. He 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, Dr. Mark Leonard Katz 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. Mark Leonard Katz practices at 5901 E 7th St, Mailcode #006/116a - Mental Health Cg, Long Beach, California, 90822-5201.

To schedule an appointment with Dr. Mark Leonard Katz, please contact the office at 562-826-8000.

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