Joyce Fivehouse Derby, PH.D.

Primary specialty

PsychologistTaxonomy code 103T00000X

License

03079 Issued in MD

Practice address

2915 Olney Sandy Spring Rd Ste B
Olney, MD 20832-3502

Phone

(301) 570-7500

NPI assigned

Feb 12, 2007

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in MD

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, 1993

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

Practice roles

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.

• Andrea Z Lopes LCSW

  • Clinical Social Worker
  • Olney, MD
  • NPI 1194009134
  NPD (past)

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

{
    "created_epoch": "1171238400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1538200399",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4900 CONTINENTAL DR",
            "city": "OLNEY",
            "state": "MD",
            "postal_code": "208322972",
            "telephone_number": "301-570-1513",
            "fax_number": "310-260-8218"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2915 OLNEY SANDY SPRING RD STE B",
            "city": "OLNEY",
            "state": "MD",
            "postal_code": "208323502",
            "telephone_number": "301-570-7500"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DERBY",
        "first_name": "JOYCE",
        "middle_name": "FIVEHOUSE",
        "name_prefix": "Dr.",
        "credential": "PH.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2007-02-12",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "MD",
            "license": "03079",
            "primary": false
        },
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "MD",
            "license": "03079",
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "MD",
            "license": "03079",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "APS",
            "identifier": "124466",
            "state": "MD"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS BLUE SHIELD",
            "identifier": "3838 0001",
            "state": "MH"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Barbara W. Dawson, CRNA
• Danielle Day, LMSW
• Maria T Defendini, MD
• Keith Della Grotta, MD
• Delphi OB-GYN Group of Montgomery County LLC
• Aashish Dewan, MD
• DHP of Montgomery PC
• Cheryl Pradeepika Dias, M.D.
• Bryan Isai Diaz
• Denise Ann Dickenson, MPT, PT#19576

• Psychologist in Olney, MD
• Providers in Olney, MD by specialty
• Psychologist in Maryland

• 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.