Psychiatrist

Ryan Thomas Ash, MD, PHD

300 Pasteur Dr, Palo Alto, California, 94304-2203

About Ryan Thomas Ash

Ryan Thomas Ash is a psychiatrist based in Palo Alto, California who is specialized in Psychiatry. Active license number of Ryan Thomas Ash is A165366 for Psychiatry in California. His current practice location is 300 Pasteur Dr, Palo Alto. Patients can contact him at 650-723-4000. Ryan Thomas Ash, MD, PHD, specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1023514411.

Ryan Thomas Ash 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

Ryan Thomas Ash'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 Ryan Thomas Ash
Specialization Psychiatry
Credentials MD, PHD
Gender Male
Practice Address: 300 Pasteur Dr,
Palo Alto, CA - 94304-2203

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 Number1023514411
NPI Enumeration Date: 04 Apr, 2018
NPI Last Update On: 18 Oct, 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 Ryan Thomas Ash are as mentioned below.

License NumberSpecializationStateStatus
A165366Psychiatry CaliforniaPrimary

Mailing Address

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

Ryan Thomas Ash
300 Pasteur Dr,
Palo Alto, CA - 94304-2203
Phone: 650-723-4000

Book an Appointment with Ryan Thomas Ash

To schedule an appointment, contact Ryan Thomas Ash at 300 Pasteur Dr, Palo Alto, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Ryan Thomas Ash:

Ryan Thomas Ash 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, Ryan Thomas Ash 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.

Ryan Thomas Ash practices at 300 Pasteur Dr, Palo Alto, California, 94304-2203.

To schedule an appointment with Ryan Thomas Ash, please contact the office at 650-723-4000.

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