Mark Hreish, - Medicare Psychiatry in Riverside, CA

Mark Hreish, is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Riverside, California. He graduated from medical school in 2012 and has 12 years of diverse experience with area of expertise as Psychiatry. He is a member of the group practice Southern California Permanente Medical Group and his current practice location is 10800 Magnolia Ave, Riverside, California. You can reach out to his office (for appointments etc.) via phone at (951) 353-2000.

Mark Hreish is licensed to practice in California (license number A137381) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1164839502.

Contact Information

Mark Hreish,
10800 Magnolia Ave,
Riverside, CA 92505-3043
(951) 353-2000
Not Available

Map and Direction




Physician's Profile

Full NameMark Hreish
GenderMale
SpecialityPsychiatry
Experience12 Years
Location10800 Magnolia Ave, Riverside, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Mark Hreish graduated from medical school in 2012
  NPI Data:
  • NPI Number: 1164839502
  • Provider Enumeration Date: 07/17/2014
  • Last Update Date: 12/01/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 4880981695
  • Enrollment ID: I20160922000643

Medical Identifiers

Medical identifiers for Mark Hreish such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1164839502NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry A137381 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Southern California Permanente Medical Group60027291757951

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Mark Hreish allows following entities to bill medicare on his behalf.
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316979834
PECOS PAC ID: 6002729175
Enrollment ID: O20040126000823

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mark Hreish is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mark Hreish,
10800 Magnolia Ave,
Riverside, CA 92505-3043

Ph: () -
Mark Hreish,
10800 Magnolia Ave,
Riverside, CA 92505-3043

Ph: (951) 353-2000

Reviews and Comments


Psychiatry & Neurology Doctors in Riverside, CA

Dr. Dalia N Balsamo, M.D.
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Richard D Prather, MD
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Dr. Tokunbo Labisi Williams, M.D
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Dr. Sahar Hamidy Osman, M.D.
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Practice Location: 4234 Riverwalk Pkwy Ste 230, Riverside, CA 92505
Phone: 951-781-3672    Fax: 951-781-0365
Arthur Amador, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 769 W Blaine St Ste B, Riverside, CA 92507
Phone: 951-358-4705    Fax: 951-358-4719

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.