Mr Gregory Robert Obray, PA-C - Medicare Physician Assistant in Clarkston, WA

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Mr Gregory Robert Obray, PA-C is a medicare enrolled "Physician Assistant - Surgical" in Clarkston, Washington. He graduated from nursing school in 2013 and has 13 years of diverse experience with area of expertise as Physician Assistant. He is a member of the group practice Catalyst Medical Group Pllc, Tri-state Memorial Hospital, Catalyst Medical Group Pllc and his current practice location is 1207 Evergreen Ct, Clarkston, Washington. You can reach out to his office (for appointments etc.) via phone at (509) 769-2254.

Mr Gregory Robert Obray is licensed to practice in Idaho (license number M7482) 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 1083770192.

Contact Information

Mr Gregory Robert Obray, PA-C
1207 Evergreen Ct,
Clarkston, WA 99403-2874
(509) 769-2254
(509) 769-2255

Map and Direction




Provider's Profile

Full NameMr Gregory Robert Obray
GenderMale
SpecialityPhysician Assistant
Experience13 Years
Location1207 Evergreen Ct, Clarkston, Washington
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:
  • Mr Gregory Robert Obray graduated from nursing school in 2013
  NPI Data:
  • NPI Number: 1083770192
  • Provider Enumeration Date: 12/31/2006
  • Last Update Date: 01/21/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 9638302607
  • Enrollment ID: I20140428000561

Medical Identifiers

Medical identifiers for Mr Gregory Robert Obray such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1083770192NPI-NPPES
8204851MedicaidWA
805208800MedicaidID

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363AS0400XPhysician Assistant - Surgical 00034506 (Washington)Secondary
363AS0400XPhysician Assistant - Surgical M7482 (Idaho)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Tri-state Memorial HospitalClarkston, WAHospital
St Joseph Regional Medical CenterLewiston, IDHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Catalyst Medical Group Pllc236572210531
Tri-state Memorial Hospital408250242233
Catalyst Medical Group Pllc236572210531

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. Mr Gregory Robert Obray allows following entities to bill medicare on his behalf.
Entity NameTri-state Memorial Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1598814352
PECOS PAC ID: 4082502422
Enrollment ID: O20040308001123
Entity NameColumbia County Hospital District
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1134128911
PECOS PAC ID: 5597653758
Enrollment ID: O20040309000515
Entity NameTri-state Memorial Hospital
Entity TypePart A Provider - Critical Access Hospital
Entity IdentifiersNPI Number: 1760485221
PECOS PAC ID: 4082502422
Enrollment ID: O20061104000320
Entity NameCatalyst Medical Group PLLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912458787
PECOS PAC ID: 2365722105
Enrollment ID: O20161213001006

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. Mr Gregory Robert Obray 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
Mr Gregory Robert Obray, PA-C
Po Box 189,
Clarkston, WA 99403-0189

Ph: (509) 758-2254		Mr Gregory Robert Obray, PA-C
1207 Evergreen Ct,
Clarkston, WA 99403-2874

Ph: (509) 769-2254

Reviews and Comments


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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.