Individual provider Active NPI

Steven Herbert Woolf, MD

  • Family Medicine Physician
  • Fairfax, VA
National Provider Identifier
1275527426
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
0101049211 Issued in VA
Practice address
3650 Joseph Siewick Dr
Ste 400
Fairfax, VA 22033-1710
Phone
(703) 391-2020
Fax
(703) 391-1211
NPI assigned
Sep 2, 2005
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X 0101049211 VA Primary

Addresses

Primary practice location

3650 Joseph Siewick Dr
Ste 400
Fairfax, VA 22033-1710

Mailing address

3650 Joseph Siewick Dr
Ste 400
Fairfax, VA 22033-1710
Phone (703) 391-2020

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
Doctor of Medicine

NPI Registry JSON

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

{
    "created_epoch": "1125619200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1275527426",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3650 JOSEPH SIEWICK DR",
            "address_2": "STE 400",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220331710",
            "telephone_number": "703-391-2020",
            "fax_number": "703-391-1211"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3650 JOSEPH SIEWICK DR",
            "address_2": "STE 400",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220331710",
            "telephone_number": "703-391-2020",
            "fax_number": "703-391-1211"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WOOLF",
        "first_name": "STEVEN",
        "middle_name": "HERBERT",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-02",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "VA",
            "license": "0101049211",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Fairfax, VA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.