Mason James Weir

Primary specialty

Physician AssistantTaxonomy code 363A00000X

Practice address

806 County Highway 11
Oneonta, NY 13820-3333

Phone

(607) 287-8509

NPI assigned

Oct 20, 2025

Last updated

Oct 20, 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

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Specialty

Physician Assistant

Education

Other, 2025

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

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

{
    "created_epoch": "1760918400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1760918400000",
    "number": "1780551341",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "806 COUNTY HIGHWAY 11",
            "city": "ONEONTA",
            "state": "NY",
            "postal_code": "138203333",
            "telephone_number": "607-287-8509"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "806 COUNTY HIGHWAY 11",
            "city": "ONEONTA",
            "state": "NY",
            "postal_code": "138203333",
            "telephone_number": "607-287-8509"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WEIR",
        "first_name": "MASON",
        "middle_name": "JAMES",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-10-20",
        "last_updated": "2025-10-20",
        "certification_date": "2025-10-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ann Elizabeth Walsh, LCSW-R
• Kenneth S. Walters, PH,D.
• Gary P Wannamaker, LMSW
• Jennifer Dawn Weaver, PA
• Randelle Marie Webster, LCSW
• Stephen Robert Weissflog, PT
• Michelle Weitzel
• Wellnow Urgent Care, PC (WellNow Urgent Care)
• Wellnow Urgent Care, PC (WellNow Urgent Care)
• Mary Beth Weston, M.A.; BCBA

• Physician Assistant in Oneonta, NY
• Providers in Oneonta, NY by specialty
• Physician Assistant in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 20, 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.