Individual provider Active NPI

Margretta Lena Williams

  • Assistant Behavior Analyst
  • Gaithersburg, MD
National Provider Identifier
1356276455
Registry record updated Jun 17, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Assistant Behavior AnalystTaxonomy code 106E00000X
Practice address
509 Quince Orchard Rd Ste 205
Gaithersburg, MD 20878-1435
Phone
(855) 832-6727
NPI assigned
Jun 17, 2026
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 17, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Assistant Behavior Analyst 106E00000X MD Primary

Addresses

Primary practice location

509 Quince Orchard Rd Ste 205
Gaithersburg, MD 20878-1435

Mailing address

13036 Town Commons Dr
Germantown, MD 20874-9126

Other practice location 1

7108 S Kanner Hwy
Stuart, FL 34997-7462
Phone (855) 832-6727

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

NPI Registry JSON

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

{
    "created_epoch": "1781654400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781654400000",
    "number": "1356276455",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "13036 TOWN COMMONS DR",
            "city": "GERMANTOWN",
            "state": "MD",
            "postal_code": "208749126"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "509 QUINCE ORCHARD RD STE 205",
            "city": "GAITHERSBURG",
            "state": "MD",
            "postal_code": "208781435",
            "telephone_number": "855-832-6727"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "7108 S Kanner Hwy",
            "address_purpose": "LOCATION",
            "city": "Stuart",
            "state": "FL",
            "postal_code": "349977462",
            "country_code": "US",
            "telephone_number": "855-832-6727",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "MARGRETTA",
        "middle_name": "LENA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-06-17",
        "last_updated": "2026-06-17",
        "certification_date": "2026-06-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "106E00000X",
            "taxonomy_group": "",
            "desc": "Assistant Behavior Analyst",
            "state": "MD",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Gaithersburg, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 17, 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.