Dr Gregory Wallis, DO - Medicare Emergency Medicine in Pullman, WA

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Dr Gregory Wallis, DO is a medicare enrolled "Emergency Medicine" physician in Pullman, Washington. He graduated from medical school in 2020 and has 5 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Dhhs Ihs Phoenix Area and his current practice location is 835 Se Bishop Blvd, Pullman, Washington. You can reach out to his office (for appointments etc.) via phone at (509) 332-2541.

Dr Gregory Wallis is licensed to practice in Washington (license number OP61426716) 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 1790308278.

Contact Information

Dr Gregory Wallis, DO
835 Se Bishop Blvd,
Pullman, WA 99163-5512
(509) 332-2541
Not Available

Map and Direction




Physician's Profile

Full NameDr Gregory Wallis
GenderMale
SpecialityEmergency Medicine
Experience5 Years
Location835 Se Bishop Blvd, Pullman, 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:
  • Dr Gregory Wallis graduated from medical school in 2020
  NPI Data:
  • NPI Number: 1790308278
  • Provider Enumeration Date: 05/19/2020
  • Last Update Date: 08/05/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 8628464096
  • Enrollment ID: I20250331001867

Medical Identifiers

Medical identifiers for Dr Gregory Wallis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1790308278NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine OP61426716 (Washington)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Pullman Regional HospitalPullman, WAHospital
Parker Indian Health CenterParker, AZHospital
Hopi Health Care CenterPolacca, AZHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Dhhs Ihs Phoenix Area024440562938

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. Dr Gregory Wallis allows following entities to bill medicare on his behalf.
Entity NameDhhs Ihs Phoenix Area
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396022026
PECOS PAC ID: 0244405629
Enrollment ID: O20120105000013
Entity NameDhhs Ihs Phoenix Area
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265719934
PECOS PAC ID: 7810163011
Enrollment ID: O20120109000961
Entity NameDhhs Ihs Phoenix Area
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1356628028
PECOS PAC ID: 9436325420
Enrollment ID: O20120222000148
Entity NameIrene Benn Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1841535317
PECOS PAC ID: 0840430724
Enrollment ID: O20130717000832

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. Dr Gregory Wallis 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
Dr Gregory Wallis, DO
Po Box 95461,
Cleveland, OH 44101-0033

Ph: (928) 669-2137		Dr Gregory Wallis, DO
835 Se Bishop Blvd,
Pullman, WA 99163-5512

Ph: (509) 332-2541

Reviews and Comments


Emergency Medicine Doctors in Pullman, WA

Dr. Gerardo R Rodriquez, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 835 Se Bishop Blvd, Pullman, WA 99163
Phone: 509-336-7388    Fax: 509-336-7389
Dr. Larry E Brown, M.D.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 835 Se Bishop Blvd, Pullman, WA 99163
Phone: 509-336-7388    Fax: 509-336-7389
Dr. Stephen C Bergmann, M.D.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 835 Se Bishop Blvd, Pullman, WA 99163
Phone: 509-336-7388    Fax: 509-336-7389
Dr. Clifford Louis Lightfoot Iii, DO
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 835 Se Bishop Blvd, Pullman, WA 99163
Phone: 509-336-7386    
Dr. Peter M Mikkelsen, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 835 Se Bishop Blvd, Pullman, WA 99163
Phone: 509-336-7388    Fax: 509-336-7389

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.