Psychologist | General Psychology

Ms. Margaret Koster, LCSW

16100 N Highway 101 Spc 72, Willits, California, 95490-9715

About Ms. Margaret Koster

Ms. Margaret Koster is a psychologist based in Willits, California who is specialized in General Psychology. Active license number of Ms. Margaret Koster is LCS5820 for General Psychology in California. Her current practice location is 16100 N Highway 101 Spc 72, Willits. Patients can contact her at 707-459-5970. Ms. Margaret Koster, LCSW, specializes in General Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1770609919.

Ms. Margaret Koster is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Practice Information

Ms. Margaret Koster'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 Ms. Margaret Koster
Specialization General Psychology
Credentials LCSW
Gender Female
Practice Address: 16100 N Highway 101 Spc 72,
Willits, CA - 95490-9715

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 Number1770609919
NPI Enumeration Date: 21 Mar, 2007
NPI Last Update On: 11 Sep, 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 Ms. Margaret Koster are as mentioned below.

License NumberSpecializationStateStatus
LCS5820General Psychology CaliforniaPrimary
LCS5820Social Worker CaliforniaSecondary

Mailing Address

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

Ms. Margaret Koster
16100 N Highway 101 Spc 72,
Willits, CA - 95490-9715
Phone: 707-459-5970

Book an Appointment with Ms. Margaret Koster

To schedule an appointment, contact Ms. Margaret Koster at 16100 N Highway 101 Spc 72, Willits, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Ms. Margaret Koster:

Ms. Margaret Koster is a psychologist specializing in General Psychology. She is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Yes, Ms. Margaret Koster 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.

Ms. Margaret Koster practices at 16100 N Highway 101 Spc 72, Willits, California, 95490-9715.

To schedule an appointment with Ms. Margaret Koster, please contact the office at 707-459-5970.

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