NPIMap

Organization Active NPI

American Oncology Partners, P.a.

  • Hematology & Oncology Physician
  • Fredericksburg, VA
National Provider Identifier
1801752647
Registry record updated Dec 24, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology & Oncology PhysicianTaxonomy code 207RH0003X
Legal business name
AMERICAN ONCOLOGY PARTNERS, P.A.
Practice address
4545 Empire CT
Fredericksburg, VA 22408-1949
Phone
(540) 371-0079
Fax
(540) 656-2653
NPI assigned
Dec 24, 2025
Last updated
Dec 24, 2025By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Dec 24, 2025

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

Authorized official

Name
Dr. Ryan K Olson, MD
Title
Owner/President
Phone
(239) 561-9622

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology (Internal Medicine) PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RH0000X
Hematology & Oncology PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RH0003X Primary
Medical Oncology PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RX0202X

Addresses

Primary practice location

4545 Empire CT
Fredericksburg, VA 22408-1949

Mailing address

PO Box 749495
Atlanta, GA 30374-9495
Phone (855) 963-2100

National Provider Directory

National Provider Directory
Tax ID family
American Oncology Partners PA157 organizations share this tax ID, including this one

Organizations with this tax ID in the same state 6

This tax ID family is large, so up to 24 of its organizations in the same state are linked here.

Locations

4545 Empire Ct
Fredericksburg, VA 22408
Phone (540) 371-0079

NPI Registry JSON

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

{
    "created_epoch": "1766534400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1766534400000",
    "number": "1801752647",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 749495",
            "city": "ATLANTA",
            "state": "GA",
            "postal_code": "303749495",
            "telephone_number": "855-963-2100",
            "fax_number": "813-321-1296"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4545 EMPIRE CT",
            "city": "FREDERICKSBURG",
            "state": "VA",
            "postal_code": "224081949",
            "telephone_number": "540-371-0079",
            "fax_number": "540-656-2653"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "AMERICAN ONCOLOGY PARTNERS, P.A.",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-12-24",
        "last_updated": "2025-12-24",
        "certification_date": "2025-12-24",
        "status": "A",
        "authorized_official_last_name": "OLSON",
        "authorized_official_first_name": "RYAN",
        "authorized_official_middle_name": "K",
        "authorized_official_title_or_position": "OWNER/PRESIDENT",
        "authorized_official_telephone_number": "239-561-9622",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207RH0000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Hematology",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Medical Oncology",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Fredericksburg, VA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 24, 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.