Individual provider Active NPI

Margaret Joan Best, CLINICAL NURSE SPECI

  • Registered Nurse
  • Herndon, VA
National Provider Identifier
1124170766
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Registered NurseTaxonomy code 163W00000X
License
0001054045 Issued in VA
Practice address
435 A Carlisle Drive
Herndon, VA 20170
Phone
(703) 715-6021
Fax
(703) 620-0605
NPI assigned
Jan 16, 2007
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Registered Nurse 163W00000X 0001054045 VA Primary
Clinical Nurse Specialist 364S00000X 0015000685 VA

Addresses

Primary practice location

435 A Carlisle Drive
Herndon, VA 20170

Mailing address

2011 Soapstone Drive
Reston, VA 20191
Phone (703) 620-1247

Other names 1

  • Mrs. Peggy Joan Best Other name

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)
Enrolled
Credentials
Certified Nurse Specialist

State licenses

LicenseStateTypeSpecialty
0001054045VAMDRegistered Nurse
0015000685VAMDClinical Nurse Specialist

NPI Registry JSON

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

{
    "created_epoch": "1168905600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1124170766",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2011 SOAPSTONE DRIVE",
            "city": "RESTON",
            "state": "VA",
            "postal_code": "20191",
            "telephone_number": "703-620-1247",
            "fax_number": "703-620-0605"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "435 A CARLISLE DRIVE",
            "city": "HERNDON",
            "state": "VA",
            "postal_code": "20170",
            "telephone_number": "703-715-6021",
            "fax_number": "703-620-0605"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BEST",
        "first_name": "MARGARET",
        "middle_name": "JOAN",
        "name_prefix": "Mrs.",
        "credential": "CLINICAL NURSE SPECI",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-01-16",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "VA",
            "license": "0001054045",
            "primary": true
        },
        {
            "code": "364S00000X",
            "taxonomy_group": "",
            "desc": "Clinical Nurse Specialist",
            "state": "VA",
            "license": "0015000685",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "PEGGY",
            "last_name": "BEST",
            "middle_name": "JOAN",
            "prefix": "MRS.",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

Other providers in Herndon, VA

Sources for this page

  • 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.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.