Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Lloyd Streets, PHD
Clinical Psychologist in Chico, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164587705
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Lloyd Streets
Credential PHD
Sex Male
Practice address 1660 Humboldt Rd, Suite 3, Chico, CA, 95928
Phone (530) 891-6521
Enumeration date Dec 26, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY11878 (CA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Mark Streets practice?
The practice location on file with NPPES is in Chico, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Streets?
The National Provider Identifier (NPI) for Mark Streets is 1164587705, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Francis Mcdermott Specialist · Chico, CA NPI 1437148491 Margaret Mcdonald Psychologist · Chico, CA NPI 1194750364 Philip Horning General Practice Dentistry · Chico, CA NPI 1013137678 Jin R Soofi MD PC Psychiatry Physician · Chico, CA NPI 1558522649 Danielle Farris Psychiatric/Mental Health Nurse Practitioner · Chico, CA NPI 1023490125 Francis Patrick Mcdermott, Jr. Psychiatry Physician · Chico, CA NPI 1053796086
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.