Physician Profile
Unclaimed ProfileAbout ERGEN
William Frederick Ergen, M.D. practises gastroenterology in Knoxville, TN. William is a 2012 graduate of University of Tennessee, Hsc, College of Medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Ergen specialise in?
Dr. Ergen is a gastroenterology in Knoxville, TN. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. Ergen located?
Dr. Ergen is listed at 1311 DOWELL SPRINGS BLVD, Knoxville, TN 37909. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ergen's phone number?
The number on file is (865) 588-5121. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Ergen?
Dr. Ergen's National Provider Identifier is 1710249529. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Ergen go to medical school?
Dr. Ergen attended University of Tennessee, Hsc, College of Medicine, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Ergen have?
Dr. Ergen has 14 years experience. Calculated from a graduation year of 2012, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Ergen do most often?
According to Medicare billing data, Dr. Ergen performs procedures including removal of polyps or growths of large bowel using an endoscope with mechanical snare, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and biopsy of large bowel using a flexible endoscope; provides treatments such as administration of chemotherapy into vein, 1 hour or less and imaging of digestive tract done from the inside of the digestive tract, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Ergen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ergen. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (865) 588-5121
- Email not available
Practice Locations
1311 DOWELL SPRINGS BLVD
Knoxville, TN 37909
Procedures Most Often Billed to Medicare
22,645 services · 662 patients · 12 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
188 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
105 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
57 |
| Dilation of esophagus | Procedure | 43450 |
20 |
| Biopsy of lower large bowel using a flexible endoscope | Procedure | 45331 |
12 |
| Administration of chemotherapy into vein, 1 hour or less | Treatment | 96413 |
95 |
| Imaging of digestive tract done from the inside of the digestive tract | Treatment | 91110 |
11 |
| Injection, vedolizumab, intravenous, 1 mg | Drug given | J3380 |
21,900 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
152 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
55 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 8
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterology specialists in Knoxville 6
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at University of Tennessee, Hsc, College of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 2012 at University of Tennessee, Hsc, College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of polyps or growths of large bowel using an endoscope with mechanical snare 8
Providers in TN who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.