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

Mark Hreish

Individual provider Psychiatry Physician · NPI 1164839502

Mark Hreish is a Psychiatry in Riverside, California. Qualified in 2012, 14 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
14
Licensed in
CA
In the registry since
2014
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Practice location Address checks out

10800 Magnolia Ave
Riverside, CA 92505-3043
Phone: (951) 353-2000
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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 A137381 (CA)

Record details

NPI number1164839502
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJuly 17, 2014
Last updated in NPPESDecember 1, 2021
Mailing address10800 Magnolia Ave, Riverside, CA 92505-3043

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Riverside