William Montague Downs, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

MD-2101 Issued in HI

Practice address

4457 Pahee St
Lihue, HI 96766-2032

Phone

(808) 245-7277

Fax

(808) 245-5006

NPI assigned

Sep 13, 2006

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 HI

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 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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 and National Provider Directory roles.

• Kauai Medical Clinic

  • Multi-Specialty Clinic/Center
  • Lihue, HI
  • NPI 1376596643

  HI

  Medicare reassignment NPD
• Kauai Medical Clinic

  • Durable Medical Equipment & Medical Supplies
  • Koloa, HI
  • NPI 1871611558
  NPD
• Kauai Hospice Inc

  • Community Based Hospice Care Agency
  • Lihue, HI
  • NPI 1407887813
  NPD (past)

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

{
    "created_epoch": "1158105600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771804800000",
    "number": "1164527537",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4457 PAHEE ST STE B",
            "city": "LIHUE",
            "state": "HI",
            "postal_code": "967662032",
            "telephone_number": "808-245-7277",
            "fax_number": "808-245-1009"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4457 PAHEE ST",
            "city": "LIHUE",
            "state": "HI",
            "postal_code": "967662032",
            "telephone_number": "808-245-7277",
            "fax_number": "808-245-5006"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DOWNS",
        "first_name": "WILLIAM",
        "middle_name": "MONTAGUE",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-09-13",
        "last_updated": "2026-02-23",
        "certification_date": "2026-02-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "HI",
            "license": "MD-2101",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Chelsea Ihope Domingcil, APRN
• Cora Ze Ying Dong, MD
• Afton Anne Dooley
• Summer Douban, M.D.
• Catherine Downey, ND
• Dr. Chet a. Myers. O.D., LLC
• Dr. Joseph Schafermeyer LLC.
• Steven Gary Dubey, ND, LAC
• Elyse F Dufour-Collins, FNP
• Sandy Belle Dumar, DDS

• All providers in Lihue, HI
• Emergency Medicine Physician in Hawaii

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 23, 2026; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.