Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Karen Theresia Marcus, MD

Individual provider Psychiatry Physician · NPI 1003043993

Dr. Karen Theresia Marcus, MD is a Psychiatry in Pittsburg, California. Graduated from University of California, San Diego School of Medicine in 2007, 19 years ago. Practices with Bay Psychiatric Associates, a 60-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
19
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2311 Loveridge Rd 2nd Fl
Pittsburg, CA 94565-5117
Phone: (925) 431-2600
Fax: (925) 431-2665
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A108365 (CA)

Record details

NPI number1003043993
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 17, 2009
Last updated in NPPESMarch 20, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPSYCHIATRY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Bay Psychiatric Associates — 60 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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