William Frederick Ergen, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

51868 Issued in TN

Practice address

1311 Dowell Springs Blvd
Knoxville, TN 37909-2454

Phone

(865) 588-5121

NPI assigned

Jun 8, 2012

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in TN

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 1

Specialty

Gastroenterology

Education

University of Tennessee, HSC, College of Medicine, 2012

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Gastrointestinal Associates PCGroup PAC ID 9739132705, 33 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Fort Sanders Regional Medical Center Hospital, Knoxville, TN, CCN 440125
• Parkwest Medical Center Hospital, Knoxville, TN, CCN 440173
• University Health System, Inc Hospital, Knoxville, TN, CCN 440015
• Leconte Medical Center Hospital, Sevierville, TN, CCN 440081
• Physicians Regional Medical Center Hospital, Powell, TN, CCN 440120

Merit-based Incentive Payment System (MIPS)

Final score

90.72 of 100Reported as group

Quality

91.46

Promoting interoperability

100

Improvement activities

40

Cost

77.6

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

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

• Gastrointestinal Associates, PC

  • Gastroenterology Physician
  • Knoxville, TN
  • NPI 1780695999
  Medicare reassignment Care Compare group NPD
• Endoscopy Center of Knoxville LP

  • Ambulatory Surgical Clinic/Center
  • Knoxville, TN
  • NPI 1528047040
  NPD (past)
• Tec North, LLC

  • Ambulatory Surgical Clinic/Center
  • Powell, TN
  • NPI 1285692004
  NPD (past)

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

• Fort Sanders Regional Medical Center

  • General Acute Care Hospital
  • Knoxville, TN
  • NPI 1942294814
  Care Compare affiliation
• Leconte Medical Center

  • General Acute Care Hospital
  • Sevierville, TN
  • NPI 1528052578
  Care Compare affiliation
• Metro Knoxville Hma LLC

  • General Acute Care Hospital
  • Powell, TN
  • NPI 1043292899
  Care Compare affiliation
• Parkwest Medical Center

  • General Acute Care Hospital
  • Knoxville, TN
  • NPI 1396739165
  Care Compare affiliation
• University Health System, Inc.

  • General Acute Care Hospital
  • Knoxville, TN
  • NPI 1538164090
  Care Compare affiliation

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

{
    "created_epoch": "1339113600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1744243200000",
    "number": "1710249529",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1311 DOWELL SPRINGS BLVD",
            "city": "KNOXVILLE",
            "state": "TN",
            "postal_code": "379092454",
            "telephone_number": "865-588-5121",
            "fax_number": "865-588-2126"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1311 DOWELL SPRINGS BLVD",
            "city": "KNOXVILLE",
            "state": "TN",
            "postal_code": "379092454",
            "telephone_number": "865-588-5121"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ERGEN",
        "first_name": "WILLIAM",
        "middle_name": "FREDERICK",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-06-08",
        "last_updated": "2025-04-10",
        "certification_date": "2025-04-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "TN",
            "license": "51868",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Steven Epps
• Patricia Lynn Ercolano
• Alim Erdem, MD
• Amanda Ergen, NP-C
• Frederick J Ergen, M.D.
• Eric R. Carlson, MD, DMD
• Elaine S Erickson, PH.D.
• Heather Marie Ericson
• Bryan James Eriksen, MD
• Liliane Rebecca Ernst, MD

• Gastroenterology Physician in Knoxville, TN
• Providers in Knoxville, TN by specialty
• Gastroenterology Physician in Tennessee

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 10, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.