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

Barbara L. Johnston, PHD

Individual provider Psychologist · NPI 1982924965

Barbara L. Johnston, PHD is a Clinical Psychologist in Martinez, California. Qualified in 1997, 29 years ago. Practices with The Davis Street Community Center Incorporated, a 10-clinician group and accepts Medicare assignment.

Years since qualifying
29
In the registry since
2010
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

41 Wanda Way
Martinez, CA 94553-9778
Phone: (925) 229-3162
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X

Record details

NPI number1982924965
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedJune 1, 2010
Last updated in NPPESOctober 25, 2010
Mailing address41 Wanda Way, Martinez, CA 94553-9778

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice The Davis Street Community Center Incorporated — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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