Individual provider Active NPI

James Austin Underwood, MD

  • Sports Medicine (Physical Medicine & Rehabilitation) Physician
  • Jacksonville, FL
National Provider Identifier
1912432022
Registry record updated Sep 28, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Sports Medicine (Physical Medicine & Rehabilitation) PhysicianTaxonomy code 2081S0010X
License
ME182898 Issued in FL
Practice address
4500 San Pablo Rd S
Jacksonville, FL 32224-1865
Phone
(904) 953-2000
NPI assigned
Apr 26, 2017
Last updated
Sep 28, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 28, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Physical Medicine & Rehabilitation Physician 208100000X ME182898 FL
Sports Medicine (Physical Medicine & Rehabilitation) Physician 2081S0010X 0101274225 VA
Sports Medicine (Physical Medicine & Rehabilitation) Physician 2081S0010X ME182898 FL Primary

Addresses

Primary practice location

4500 San Pablo Rd S
Jacksonville, FL 32224-1865

Mailing address

PO Box 860912
Minneapolis, MN 55486-0912

Other practice location 1

21475 Ridgetop Cir Ste 150
Sterling, VA 20166-6580
Phone (703) 444-5000

Other practice location 2

25055 Riding Plz Ste 260
Chantilly, VA 20152-5922
Phone (703) 272-5000

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address junderwood2737166@ehrdirect.mayoclinicmsg.org

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in DC, VA2 enrollments
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20220531002378 DC Practitioner - Physical Medicine and Rehabilitation 7315217643 Reassigns benefits to 1 organization
I20220606000254 VA Practitioner - Physical Medicine and Rehabilitation 7315217643 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Physical Medicine and Rehabilitation
Education
Georgetown University School of Medicine, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Arthritis and Sports Orthopaedics PCGroup PAC ID 7618866476, 23 clinicians

Practice addresses (Care Compare)

21475 Ridgetop Cir
Sterling, VA 20166-6580
Phone 7034445000117

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
23.28 of 100Reported as individual
Quality
0
Promoting interoperability
0
Improvement activities
0
Cost
77.61

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Arthritis & Sports Orthopaedics PC CurrentSince Aug 1, 2022 Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients

Locations

25055 Riding Plz
Ste 260
Chantilly, VA 20152
Phone (703) 272-5000

1850 Town Center Pkwy
Reston, VA 20190
Phone (703) 478-0922

21475 Ridgetop Cir
Ste 150
Sterling, VA 20166
Phone (703) 433-2500

Interoperability endpoints

  • Direct secure messaging: james.underwood.p1@direct.tsiva.nextgenshare.com

Organizations & group practices 2

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 3

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1493164800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790553600000",
    "number": "1912432022",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 860912",
            "city": "MINNEAPOLIS",
            "state": "MN",
            "postal_code": "554860912"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4500 SAN PABLO RD S",
            "city": "JACKSONVILLE",
            "state": "FL",
            "postal_code": "322241865",
            "telephone_number": "904-953-2000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "21475 Ridgetop Cir Ste 150",
            "address_purpose": "LOCATION",
            "city": "Sterling",
            "state": "VA",
            "postal_code": "201666580",
            "country_code": "US",
            "telephone_number": "703-444-5000",
            "fax_number": "703-444-4999",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "25055 Riding Plz Ste 260",
            "address_purpose": "LOCATION",
            "city": "Chantilly",
            "state": "VA",
            "postal_code": "201525922",
            "country_code": "US",
            "telephone_number": "703-272-5000",
            "fax_number": "703-957-3804",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "UNDERWOOD",
        "first_name": "JAMES",
        "middle_name": "AUSTIN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-04-26",
        "last_updated": "2026-09-28",
        "certification_date": "2026-09-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208100000X",
            "taxonomy_group": "",
            "desc": "Physical Medicine & Rehabilitation",
            "state": "FL",
            "license": "ME182898",
            "primary": false
        },
        {
            "code": "2081S0010X",
            "taxonomy_group": "",
            "desc": "Physical Medicine & Rehabilitation, Sports Medicine",
            "state": "VA",
            "license": "0101274225",
            "primary": false
        },
        {
            "code": "2081S0010X",
            "taxonomy_group": "",
            "desc": "Physical Medicine & Rehabilitation, Sports Medicine",
            "state": "FL",
            "license": "ME182898",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "junderwood2737166@ehrdirect.mayoclinicmsg.org",
            "affiliation": "N",
            "address_1": "4500 San Pablo Rd S",
            "city": "Jacksonville",
            "state": "FL",
            "country_code": "US",
            "postal_code": "322241865",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Jacksonville, FL

Sources for this page

Verify at the official NPI Registry.