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

Dr. Gregory Wallis, DO

Individual provider Emergency Medicine Physician · NPI 1790308278

Dr. Gregory Wallis, DO is an Emergency Medicine in Pullman, Washington. Qualified in 2020, 6 years ago. Practices with Dhhs IHS Phoenix Area, a 52-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
6
Licensed in
WA
In the registry since
2020
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

835 SE Bishop Blvd
Pullman, WA 99163-5512
Phone: (509) 332-2541
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 12033 Agency Rd, Parker, AZ 85344-7718 — (289) 669-2137

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence OP61426716 (WA)

Record details

NPI number1790308278
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 19, 2020
Last updated in NPPESAugust 5, 2025
Certification dateAugust 5, 2025
Mailing addressPo Box 95461, Cleveland, OH 44101-0033

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Dhhs Ihs Phoenix Area — 52 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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