Gregory Wallis, DO
Emergency Medicine Physician · Pullman, WA
Gregory Wallis, DO is an emergency medicine physician with a practice address in Pullman, Washington, and NPI 1790308278, issued on May 19, 2020. Check the license (Washington OP61426716, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Gregory Wallis
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- OP61426716 WA
Self-reported in NPPES; status is on the state search - Practice location
- 835 SE Bishop Blvd, Pullman, WA 99163
- Phone
- (509) 332-2541
- Enumerated
- May 19, 2020
- Record last updated
- Aug 5, 2025
- Medicare enrollment
- Enrolled (PECOS I20250331001867); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,459 in Washington → Look up another NPI →
Also registered at 835 SE Bishop Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stacey Aggabao, RNRegistered Nurse1578800702
- Kellsi AusmanLactation Consultant (Registered Nurse)1104632827
- Hannah Bancroft, CRNA, DNPCertified Registered Nurse Anesthetist1033824784
- Daleisha BardalesMedical-Surgical Registered Nurse1972378339
- Hailey BasarabaContinuing Education/Staff Development Registered Nurse1982585873
- Stephen Bergmann, M.D.Emergency Medicine Physician1386604486
Verify Gregory Wallis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license OP61426716Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average emergency medicine physician in 2024
157 Medicare Part D claims for 106 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin20 claims
- Azithromycin19 claims
- Prednisone19 claims
- Ondansetron Odt13 claims
- Amoxicillin-Clavulanate Potass11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Dhhs Ihs Phoenix AreaParker, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Wallis among 1,459 emergency medicine physician records in Washington
Gregory Wallis, DO is one of 1,459 emergency medicine physician records with a practice address in Washington. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 91% of them.
- NPI issued2020 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2020 · median 2010 among the 851 with a school on file
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 emergency medicine physician records list a practice address in Pullman
They are 7 of the 597 NPPES records with a practice address in Pullman, and 1,459 emergency medicine physician records in Washington.
All 1,459 in Washington → Every provider in Pullman → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Stephen Bergmann, M.D.Pullman, WA 991631386604486
- Larry Brown, M.D.Pullman, WA 991631275593378
- Clifford Lightfoot, DOPullman, WA 991631700036084
- Peter Mikkelsen, M.D.Pullman, WA 991631790745792
- Gerardo Rodriquez, M.D.Pullman, WA 991631245299916
- Aaron Scott, MDPullman, WA 991631770571887
- Silas Wiefelspuett, MDRepublic, WA 991661821650391
- Thomas Tobin, M.D.Ritzville, WA 991691194801589
Common questions
What is Gregory Wallis, DO's NPI number?
Gregory Wallis, DO's National Provider Identifier (NPI) is 1790308278, issued on May 19, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Wallis, DO located?
The NPPES record lists a practice address at 835 SE Bishop Blvd, Pullman, WA, 99163. Phone: (509) 332-2541. Providers update this record themselves, so call before visiting.
How can I verify Gregory Wallis, DO's license?
NPPES lists Washington license number OP61426716, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Wallis, DO prescribe under Medicare Part D?
In 2024, Gregory Wallis, DO had 157 Medicare Part D claims for 106 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.