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

Dr. Grahamm Wiest, PSYD

Individual provider Psychologist · NPI 1962015628

Dr. Grahamm Wiest, PSYD is a Neuropsychiatry in Mission Viejo, California. Qualified in 2021, 5 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
5
Licensed in
CA
In the registry since
2020
Specialties on file
2
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

26800 Crown Valley Pkwy Ste 320
Mission Viejo, CA 92691-7320
Phone: (949) 365-2468
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1110 E Chapman Ave Ste 202, Orange, CA 92866-2139 — (714) 744-9754

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence 34353 (CA)
Psychologist Taxonomy 103T00000X (CA)

Record details

NPI number1962015628
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorNo
NPI enumeratedAugust 24, 2020
Last updated in NPPESJuly 15, 2025
Certification dateJuly 15, 2025

Medicare enrollment

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

Medicare specialtyNEUROPSYCHIATRY
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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