WILLIAM FREDERICK ERGEN M.D.
NPI 1710249529
Internal Medicine - Gastroenterology in Knoxville, TN

Q: What is William Ergen's NPI number?

The NPI number for William Ergen is 1710249529. It was assigned to this individual provider in the NPPES registry on June 8, 2012.

Q: What is William Ergen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for William Ergen was last updated on April 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 08, 2012PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

1311 DOWELL SPRINGS BLVD, KNOXVILLE, TN 37909(865) 588-5121 Get Directions Write a Review

NPPES record last updated: April 10, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 10, 2025, Jul 8, 2022 (2 updates tracked since 2022).

On this page

About William Frederick Ergen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM FREDERICK ERGEN M.D. (NPI 1710249529) is an individual gastroenterology provider in Knoxville, Tennessee, licensed in Tennessee (51868) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with University Health System, Inc, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2012).

NPPES Registry Identity

NPI1710249529

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameWILLIAM FREDERICK ERGENCredential: M.D.

Location Address1311 DOWELL SPRINGS BLVDKnoxville, TN 37909-2454

Mailing Address1311 Dowell Springs BlvdKnoxville, TN 37909-2454 · (865) 588-5121 · Fax (865) 588-2126

Phone(865) 588-5121

Sole ProprietorNo

Medical School CMSUniversity Of Tennessee, Hsc, College Of MedicineGraduated 2012

Enumeration DateJune 8, 2012

Last NPPES UpdateApril 10, 20252 updates tracked since enumeration

NPPES CertifiedApril 10, 2025

✔ NPI 1710249529 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in TN · 51868

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

1311 DOWELL SPRINGS BLVD, Knoxville, TN 37909

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BlueCross BlueShield of Tennessee.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Frederick Ergen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5698077824

PECOS Enrollment IDI20180910001643

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, vedolizumab, intravenous, 1 mg J3380

Vedolizumab is a medication given via injection. It's used to treat certain bowel conditions (such as Crohn's disease, ulcerative colitis) by reducing inflammation. It works by blocking a certain protein that causes this inflammation.

21,900 services23 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

188 services185 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

152 services120 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

105 services103 patients

Administration of chemotherapy into vein, 1 hour or less 96413

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

95 services28 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

57 services57 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

55 services55 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

35 services35 patients

Dilation of esophagus 43450

Dilation of the esophagus is a procedure aimed to stretch or open up your esophagus (the tube connecting your mouth to your stomach) when it's narrow. It helps to improve swallowing and alleviate discomfort. It's typically performed using a flexible tube or balloon, under sedation.

20 services20 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

15 services14 patients

Biopsy of lower large bowel using a flexible endoscope 45331

A biopsy of the lower large bowel involves using a flexible tube with a camera (endoscope) to examine this part of your digestive tract. Small tissue samples may be taken for further examination to detect any abnormalities.

12 services11 patients

Imaging of digestive tract done from the inside of the digestive tract 91110

This procedure, known as an endoscopy, involves a small camera being passed into the digestive tract. It helps doctors to see the inside of your digestive system in detail. This can aid in diagnosing conditions or planning treatments. It's generally safe and can provide valuable information.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Health System, Inc

Acute Care Hospitals · Knoxville, TN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440015

Location1924 Alcoa HighwayKnoxville, TN 37920 · Knox County

Emergency services Birthing friendly

Morristown Hamblen Hospital Association

Acute Care Hospitals · Morristown, TN

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number440030

Location908 W 4th North StMorristown, TN 37814 · Hamblen County

Emergency services Birthing friendly

Leconte Medical Center

Acute Care Hospitals · Sevierville, TN

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number440081

Location742 Middlecreek RoadSevierville, TN 37862 · Sevier County

Emergency services Birthing friendly

Fort Sanders Regional Medical Center

Acute Care Hospitals · Knoxville, TN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440125

Location1901 W Clinch AveKnoxville, TN 37916 · Knox County

Emergency services Birthing friendly

Parkwest Medical Center

Acute Care Hospitals · Knoxville, TN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440173

Location9352 Park West BlvdKnoxville, TN 37923 · Knox County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37909 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$121.80 typical visit price

range $52.64 – $160.89

Typical copayment $30.45 (range $13.16 – $40.22)

Most-billed visit code 99204

Established Patient

$93.60 typical visit price

range $16.72 – $131.41

Typical copayment $23.40 (range $4.18 – $32.85)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANDREA KATHRYN KOTTMEIER

Nurse Anesthetist, Certified Registered

1311 DOWELL SPRINGS BLVD
KNOXVILLE, TN 37909

Knox County (865) 588-5121

JENNIFER CHANCEY UNGER PA-C

Physician Assistant

1311 DOWELL SPRINGS BLVD
KNOXVILLE, TN 37909

Knox County (865) 588-5121

TEJAL MISTRY MD

Internal Medicine (Gastroenterology)

1311 DOWELL SPRINGS BLVD
KNOXVILLE, TN 37909

Knox County (865) 588-5121

BARRY VICTOR MAVES MD

Internal Medicine (Gastroenterology)

1311 DOWELL SPRINGS BLVD, SUITE 300
KNOXVILLE, TN 37909

Knox County (865) 588-5121

JOSEPH MICHAEL FREEMAN CRNA

Nurse Anesthetist, Certified Registered

1311 DOWELL SPRINGS BLVD
KNOXVILLE, TN 37909

Knox County (865) 588-5121

SHELBY BASS PA-C

Physician Assistant

1311 DOWELL SPRINGS BLVD
KNOXVILLE, TN 37909

Knox County (865) 588-5121

JOHN MATTHEW MOORE M.D.

Internal Medicine (Gastroenterology)

1311 DOWELL SPRINGS BLVD, SUITE 300
KNOXVILLE, TN 37909

Knox County (865) 588-5121

ANEITHA PRATT DNP

Nurse Practitioner (Family)

1311 DOWELL SPRINGS BLVD
KNOXVILLE, TN 37909

Knox County (865) 588-5121

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Ergen's NPI number?

The NPI number for William Ergen is 1710249529. It was assigned to this individual provider in the NPPES registry on June 8, 2012.

Where is William Ergen located?

William Ergen practices at 1311 Dowell Springs Blvd, Knoxville, TN 37909. The listed phone number is (865) 588-5121.

What is William Ergen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is William Ergen enrolled in Medicare?

Yes. William Ergen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Ergen accept?

Health plans from BlueCross BlueShield of Tennessee list William Ergen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Ergen affiliated with any hospitals?

According to CMS data, William Ergen is affiliated with University Health System, Inc, Morristown Hamblen Hospital Association, Leconte Medical Center, Fort Sanders Regional Medical Center and Parkwest Medical Center.

When was this NPI record last updated?

The NPPES record for William Ergen was last updated on April 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.