Walter Grenell Jr., DO

Primary specialty

Emergency Medical Services (Emergency Medicine) PhysicianTaxonomy code 207PE0004X

License

0056486 Issued in CO

Practice address

8300 W 38TH Ave
Wheat Ridge, CO 80033-6005

Phone

(303) 425-4500

NPI assigned

Mar 25, 2013

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CO, HI, AK, TX4 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 4

Specialty

Emergency Medicine

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hawaii Emergency Physicians Associated IncGroup PAC ID 2860390283, 119 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Bsa Hospital Hospital, Amarillo, TX, CCN 450231

Merit-based Incentive Payment System (MIPS)

Final score

75.44 of 100Reported as group

Quality

62.56

Promoting interoperability

81

Improvement activities

40

Cost

67.88

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wgrenell205075@direct.renown.org

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

• Hawaii Emergency Physicians Associated Inc

  • Emergency Medicine Physician
  • Kailua, HI
  • NPI 1801843198
  Medicare reassignment Care Compare group NPD
• Emergency Professionals of Colorado, PC

  • Emergency Medicine Physician
  • Loveland, CO
  • NPI 1396496469
  Medicare reassignment NPD
• Acs Primary Care Physicians Southwest, PA

  • Emergency Medicine Physician
  • Gainesville, TX
  • NPI 1538101019
  Medicare reassignment NPD
• Central Peninsula General Hospital Inc.

  • Rural Acute Care Hospital
  • Soldotna, AK
  • NPI 1528062429
  Medicare reassignment NPD
• Honokaa Hospital & Skilled Nursing

  • Critical Access Hospital
  • Honokaa, HI
  • NPI 1164506317
  Medicare reassignment NPD
• Kau Hospital

  • Rural Health Clinic/Center
  • Pahala, HI
  • NPI 1144304338
  Medicare reassignment NPD
• Emergency Professionals of Colorado, PC

  • Emergency Medicine Physician
  • Greeley, CO
  • NPI 1366835415
  NPD
• Central Peninsula General Hospital, Inc

  • Gastroenterology Physician
  • Soldotna, AK
  • NPI 1154194819
  NPD
• Central Peninsula General Hospital, Inc

  • Internal Medicine Physician
  • Soldotna, AK
  • NPI 1639523418
  NPD
• Honokaa Hospital & Skilled Nursing

  • General Practice Physician
  • Honokaa, HI
  • NPI 1992398895
  NPD
• Kau Hospital

  • Rural Health Clinic/Center
  • Pahoa, HI
  • NPI 1285450163
  NPD
• North Star Medical Imaging PLLC

  • Diagnostic Radiology Physician
  • Mount Vernon, WA
  • NPI 1144489824
  NPD

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

• Bsa Hospital LLC

  • General Acute Care Hospital
  • Amarillo, TX
  • NPI 1407191984
  Care Compare affiliation

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

{
    "created_epoch": "1364169600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758585600000",
    "number": "1669714994",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8300 W 38TH AVE",
            "city": "WHEAT RIDGE",
            "state": "CO",
            "postal_code": "800336005",
            "telephone_number": "303-425-4500"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8300 W 38TH AVE",
            "city": "WHEAT RIDGE",
            "state": "CO",
            "postal_code": "800336005",
            "telephone_number": "303-425-4500"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "250 Hospital Pl",
            "address_purpose": "LOCATION",
            "city": "Soldotna",
            "state": "AK",
            "postal_code": "996696999",
            "country_code": "US",
            "telephone_number": "907-714-4444",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GRENELL",
        "first_name": "WALTER",
        "name_suffix": "Jr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-03-25",
        "last_updated": "2025-09-23",
        "certification_date": "2025-09-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207PE0004X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Emergency Medical Services",
            "state": "AK",
            "license": "200431",
            "primary": false
        },
        {
            "code": "207PE0004X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Emergency Medical Services",
            "state": "CO",
            "license": "0056486",
            "primary": true
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "TX",
            "license": "W0917",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "wgrenell2685680@ak.providencedirect.org",
            "affiliation": "N",
            "address_1": "250 Hospital Pl",
            "city": "Soldotna",
            "state": "AK",
            "country_code": "US",
            "postal_code": "996696999",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Anna Gray Greene, LCSW
• Jenna Griggs Greenfield, MD
• Gisele Greenier, RN
• William Grego, RPH
• Gail Dawn Gregory, RN
• Makenzie Grevelding, DPT
• Gloria Suzanne Greway, PH.D LPC
• Tonya Grieb
• Payge Grieve
• Morgan Griffin, PHARMD

• Emergency Medical Services (Emergency Medicine) Physician in Wheat Ridge, CO
• Providers in Wheat Ridge, CO by specialty
• Emergency Medical Services (Emergency Medicine) Physician in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 23, 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.