Gregory Wallis, DO

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

OP61426716 Issued in WA

Practice address

835 SE Bishop Blvd
Pullman, WA 99163-5512

Phone

(509) 332-2541

NPI assigned

May 19, 2020

Last updated

Aug 5, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MO, WA, TX3 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 3

Specialty

Emergency Medicine

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

DHHS IHS Phoenix AreaGroup PAC ID 0244405629, 54 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Pullman Regional Hospital Hospital, Pullman, WA, CCN 501331
• Parker Indian Health Center Hospital, Parker, AZ, CCN 031307

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• DHHS IHS Phoenix Area

  dba Chemehuevi Health Clinic

  • Federal Public Health Clinic/Center
  • Havasu Lake, CA
  • NPI 1396022026

  TX

  Medicare reassignment Care Compare group NPD
• Grant County Public Hospital District 3

  dba Columbia Basin Hospital

  • Emergency Medical Services (Emergency Medicine) Physician
  • Ephrata, WA
  • NPI 1134283930
  Medicare reassignment NPD
• Public Hospital District #1-a of Whitman County

  dba Pullman Regional Hospital

  • Critical Access Hospital
  • Pullman, WA
  • NPI 1366446767
  Medicare reassignment NPD
• DHHS IHS Phoenix Area

  dba Peach Springs Health Center

  • Clinic/Center
  • Peach Springs, AZ
  • NPI 1265719934

  TX

  Medicare reassignment NPD
• DHHS IHS Phoenix Area

  dba Hopi Health Care Center

  • Critical Access Hospital
  • Polacca, AZ
  • NPI 1356628028

  Emergency Medicine, TX

  Medicare reassignment NPD
• Freeman Neosho Hospital

  • Critical Access Hospital
  • Neosho, MO
  • NPI 1841307428
  Medicare reassignment NPD
• Freeman-Oak Hill Health System

  dba Freeman Health System

  • General Acute Care Hospital
  • Joplin, MO
  • NPI 1891809679
  Medicare reassignment NPD
• Irene Benn Medical Center

  • Clinic/Center
  • Moapa, NV
  • NPI 1841535317

  TX

  Medicare reassignment NPD
• Chelan County Public Hospital District No 2

  dba Lake Chelan Community Hospital

  • Critical Access Hospital
  • Chelan, WA
  • NPI 1578568853
  Medicare reassignment
• Public Hospital District No 3 of Whitman County

  dba Whitman Hospital & Medical Center

  • Critical Access Hospital
  • Colfax, WA
  • NPI 1922009448
  Medicare reassignment
• DHHS IHS Phoenix

  dba Supai Health Center

  • Clinic/Center
  • Supai, AZ
  • NPI 1184901829
  NPD
• DHHS IHS Phoenix Area

  dba Parker Indian Hospital

  • Critical Access Hospital
  • Parker, AZ
  • NPI 1851678585
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Public Hospital District #1-a of Whitman County

  dba Pullman Regional Hospital

  • Critical Access Hospital
  • Pullman, WA
  • NPI 1366446767
  Care Compare affiliation
• DHHS IHS Phoenix Area

  dba Parker Indian Hospital

  • Critical Access Hospital
  • Parker, AZ
  • NPI 1851678585
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1589846400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754352000000",
    "number": "1790308278",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 95461",
            "city": "CLEVELAND",
            "state": "OH",
            "postal_code": "441010033",
            "telephone_number": "928-669-2137"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "835 SE BISHOP BLVD",
            "city": "PULLMAN",
            "state": "WA",
            "postal_code": "991635512",
            "telephone_number": "509-332-2541"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "12033 Agency Rd",
            "address_purpose": "LOCATION",
            "city": "Parker",
            "state": "AZ",
            "postal_code": "853447718",
            "country_code": "US",
            "telephone_number": "289-669-2137",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WALLIS",
        "first_name": "GREGORY",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-05-19",
        "last_updated": "2025-08-05",
        "certification_date": "2025-08-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "WA",
            "license": "OP61426716",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Abigail Waldo, ATC
• Matthew Walker, OD
• Jennifer Wall, COTA
• Emily Brooke Wallace, PHARM.D. CANDIDATE
• Ian Wallace, MS, CGC
• Walmart Inc. (WalMart Pharmacy 10-1870)
• Cameron Walsworth
• Jeffrey Loren Ward, DO
• Sanford T. Ward, D.O.
• Washington State University

• Emergency Medicine Physician in Pullman, WA
• Providers in Pullman, WA by specialty
• Emergency Medicine Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 5, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.