Psychiatrist

Dr. Donald Horowitz, MD

480 N Indian Hill Blvd, Ste. A-1, Claremont, California, 91711-4615

About Dr. Donald Horowitz

Dr. Donald Horowitz is a psychiatrist based in Claremont, California who is specialized in Psychiatry. Active license number of Dr. Donald Horowitz is A22814 for Psychiatry in California. His current practice location is 480 N Indian Hill Blvd, Ste. A-1, Claremont. Patients can contact him at 909-625-5509 or can fax him at 909-625-5508. Dr. Donald Horowitz, MD, specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1982734356.

Dr. Donald Horowitz 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. Donald Horowitz'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. Donald Horowitz
Specialization Psychiatry
Credentials MD
Gender Male
Practice Address: 480 N Indian Hill Blvd, Ste. A-1
Claremont, CA - 91711-4615
Fax 909-625-5508

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 Number1982734356
NPI Enumeration Date: 06 Mar, 2007
NPI Last Update On: 26 Mar, 2014

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. Donald Horowitz are as mentioned below.

License NumberSpecializationStateStatus
A22814Psychiatry CaliforniaPrimary

Other Medical Identifiers

Other professional identifiers associated with Dr. Donald Horowitz such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
00A228140OtherCaliforniaBLUE SHIELD

Mailing Address

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

Dr. Donald Horowitz
Po Box 1990,
Claremont, CA - 91711-8990
Phone: 909-625-5509
Fax: 909-625-5508

Book an Appointment with Dr. Donald Horowitz

To schedule an appointment, contact Dr. Donald Horowitz at 480 N Indian Hill Blvd, Ste. A-1, Claremont, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Donald Horowitz:

Dr. Donald Horowitz 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. Donald Horowitz 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. Donald Horowitz practices at 480 N Indian Hill Blvd, Ste. A-1, Claremont, California, 91711-4615.

To schedule an appointment with Dr. Donald Horowitz, please contact the office at 909-625-5509.

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