William H. Ellis, PHD

Primary specialty

PsychologistTaxonomy code 103T00000X

License

2809 Issued in MA

Practice address

218 W Main St
Hyannis, MA 02601-3778

Phone

(508) 771-4640

Fax

(508) 790-4880

NPI assigned

Mar 14, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 7

Addresses

Medicare fee-for-service enrollment

Enrolled in MA

Eligible to order & refer

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

Green means eligible to order or refer.

Enrollment records 1

Specialty

Clinical Psychologist

Education

Other, 1980

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

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

{
    "created_epoch": "1142294400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1942278031",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "218 W MAIN ST",
            "city": "HYANNIS",
            "state": "MA",
            "postal_code": "026013778",
            "telephone_number": "508-771-4640",
            "fax_number": "508-790-4880"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "218 W MAIN ST",
            "city": "HYANNIS",
            "state": "MA",
            "postal_code": "026013778",
            "telephone_number": "508-771-4640",
            "fax_number": "508-790-4880"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ELLIS",
        "first_name": "WILLIAM",
        "middle_name": "H.",
        "name_prefix": "Dr.",
        "credential": "PHD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-03-14",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "MA",
            "license": "2809",
            "primary": false
        },
        {
            "code": "103TA0400X",
            "taxonomy_group": "",
            "desc": "Psychologist, Addiction (Substance Use Disorder)",
            "state": "MA",
            "license": "2809",
            "primary": false
        },
        {
            "code": "103TA0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Adult Development & Aging",
            "state": "MA",
            "license": "2809",
            "primary": false
        },
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "MA",
            "license": "2809",
            "primary": false
        },
        {
            "code": "103TF0000X",
            "taxonomy_group": "",
            "desc": "Psychologist, Family",
            "state": "MA",
            "license": "2809",
            "primary": false
        },
        {
            "code": "103TH0100X",
            "taxonomy_group": "",
            "desc": "Psychologist, Health Service",
            "state": "MA",
            "license": "2809",
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "MA",
            "license": "2809",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Michele A Eldredge, NP
• Meghan R Elia
• Sanchia Shanica Ellis-Bowen, MD, BSC
• Stephanie Ellis
• Suzanne J. Ellis, M.ED.
• Elizabeth Reaves Ellison, ATR, LICSW
• Justin Christian Ellison, PHARM.D.
• Jill S Elmer, LICSW
• Emerald Physician Services, LLC
• Emerald Physicians

• Psychologist in Hyannis, MA
• Providers in Hyannis, MA by specialty
• Psychologist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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.