William J Collins, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

C33697 Issued in CA

Practice address

1201 W la Veta Ave
Suite 211
Orange, CA 92868-4213

Phone

(714) 639-3363

Fax

(714) 532-3460

NPI assigned

Feb 28, 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

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1141084800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1104892074",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1201 W LA VETA AVE",
            "address_2": "SUITE 211",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928684213",
            "telephone_number": "714-639-3363",
            "fax_number": "714-532-3460"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1201 W LA VETA AVE",
            "address_2": "SUITE 211",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928684213",
            "telephone_number": "714-639-3363",
            "fax_number": "714-532-3460"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "COLLINS",
        "first_name": "WILLIAM",
        "middle_name": "J",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-02-28",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "C33697",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0C3369700",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Adrienne Nicole Collier
• Brianna Kay Collier
• Brooke Marie Collier
• Nathaniel Collins, M.D.
• Roussan Collins
• Mark Colon, MD
• Clarissa Yvette Colone Nunez
• Colonial Home Care Services
• Lisa Marie Colosimo, D.O.
• Eva Colsell

• All providers in Orange, CA
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.