Psychiatrist

Lakshan Nicholas Fonseka, DO

675 18th St # Pb-5250, San Francisco, California, 94143-4200

About Lakshan Nicholas Fonseka

Lakshan Nicholas Fonseka is a psychiatrist based in San Francisco, California who is specialized in Psychiatry. Active license number of Lakshan Nicholas Fonseka is 20A25632 for Psychiatry in California. His current practice location is 675 18th St # Pb-5250, San Francisco. Patients can contact him at 415-476-7000. Lakshan Nicholas Fonseka, DO, specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1669113353.

Lakshan Nicholas Fonseka 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

Lakshan Nicholas Fonseka'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 Lakshan Nicholas Fonseka
Specialization Psychiatry
Credentials DO
Gender Male
Practice Address: 675 18th St # Pb-5250,
San Francisco, CA - 94143-4200

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 Number1669113353
NPI Enumeration Date: 05 Apr, 2022
NPI Last Update On: 26 Jun, 2026

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 Lakshan Nicholas Fonseka are as mentioned below.

License NumberSpecializationStateStatus
20A25632Psychiatry CaliforniaPrimary
Student in an Organized Health Care Education/Training Program Secondary

Mailing Address

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

Lakshan Nicholas Fonseka
28333 Bryce Dr,
Castaic, CA - 91384-3781
Phone: 661-319-6743

Book an Appointment with Lakshan Nicholas Fonseka

To schedule an appointment, contact Lakshan Nicholas Fonseka at 675 18th St # Pb-5250, San Francisco, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Lakshan Nicholas Fonseka:

Lakshan Nicholas Fonseka 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, Lakshan Nicholas Fonseka 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.

Lakshan Nicholas Fonseka practices at 675 18th St # Pb-5250, San Francisco, California, 94143-4200.

To schedule an appointment with Lakshan Nicholas Fonseka, please contact the office at 415-476-7000.

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