Daniel Gilbert Cassidy, PHD, ABPP

Primary specialty

Health PsychologistTaxonomy code 103TH0004X

License

B1-0000909 Issued in DE

Practice address

8901 Rockville Pike
Bethesda, MD 20889-5638

Phone

(315) 295-7117

NPI assigned

Apr 1, 2009

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Philosophy

State licenses

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

{
    "created_epoch": "1238544000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747612800000",
    "number": "1851533194",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8901 ROCKVILLE PIKE",
            "city": "BETHESDA",
            "state": "MD",
            "postal_code": "208890001"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8901 ROCKVILLE PIKE",
            "city": "BETHESDA",
            "state": "MD",
            "postal_code": "208895638",
            "telephone_number": "315-295-7117"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CASSIDY",
        "first_name": "DANIEL",
        "middle_name": "GILBERT",
        "name_prefix": "Dr.",
        "credential": "PHD, ABPP",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-04-01",
        "last_updated": "2025-05-19",
        "certification_date": "2025-05-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "DE",
            "license": "B1-0000909",
            "primary": false
        },
        {
            "code": "103TH0004X",
            "taxonomy_group": "",
            "desc": "Psychologist, Health",
            "state": "DE",
            "license": "B1-0000909",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Anna Kate Nicol Casey, MD
• Jillian Casey, ND
• Mark Casey
• Mary Casey
• Aileen Powers Cassidy, PA-C
• Donald Cassidy, PHD
• Quinn Kathleen Cassidy, MSW, LCSW-C
• Emmanuel George Cassimatis, M.D.
• Christopher Powers Cassleman Jr., M.S.W., L.I.C.S.W
• Steven A.R. Castillo, MD

• Health Psychologist in Bethesda, MD
• Providers in Bethesda, MD by specialty
• Health Psychologist in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 2025; 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.