Doctor profile · Federal record
Dr. William Ergen, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Knoxville, TN
- NPI 1710249529
- Accepts Medicare
- MIPS 100.0 / 100 · 2023
- 14 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1311 Dowell Springs Blvd
Knoxville, TN 379092454
(865) 588-5121
Credentials & registration
- NPI registered
- June 2012 — 14 yrs on file
- Profile last updated
- April 10, 2025
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Tennessee #51868
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1710249529. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
16,740
Distinct HCPCS
10
Medicare allowed
$446,119
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J3380 |
Injection, vedolizumab, 1 mg | 15,900 | 14 | $22 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 220 | 169 | $83 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 154 | 154 | $229 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 117 | 114 | $103 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 78 | 78 | $101 | |
96413 |
Administration of chemotherapy into vein, 1 hour or less | 73 | 20 | $116 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 60 | 60 | $106 | |
43450 |
Dilation of esophagus | 37 | 36 | $36 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 27 | 27 | $167 | |
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 19 | 19 | $58 |
In context: peer comparison
Among 15 peers in Knoxville Gastroenterology Physician, average services per provider: 176. This provider delivers 95× the peer median.Open Payments
Industry payments received
All-time total
$938
Transactions
57
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 36 | $567.05 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 6 | $92.13 | |
| Aimmune Therapeutics, INC. | 4 | $79.34 | |
| Pfizer INC. | 3 | $53.94 | |
| Janssen Biotech, INC. | 2 | $37.70 | |
| Takeda Pharmaceuticals U.S.A., INC. | 2 | $35.09 | |
| Celgene Corporation | 2 | $29.36 | |
| Ardelyx, INC. | 1 | $23.49 | |
| Ferring Pharmaceuticals INC. | 1 | $20.01 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
842
Patients
339
Total drug cost
$3,450,444
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 179 | 79 | $2,871 |
| Pantoprazole Sodium | Generic | 137 | 51 | $2,138 |
| Stelara (Ustekinumab) | Brand | 114 | 19 | $3,130,406 |
| Famotidine | Generic | 75 | 34 | $949 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 45 | 44 | $7,450 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 43 | 0 | $14,517 |
| Dicyclomine Hcl | Generic | 40 | 24 | $856 |
| Sucralfate | Generic | 39 | 21 | $6,586 |
| Entyvio (Vedolizumab) | Brand | 31 | 0 | $254,577 |
| Linzess (Linaclotide) | Brand | 28 | 13 | $20,760 |
Hospital affiliations
Frequently asked questions
What is Dr. William Ergen's medical specialty?
Dr. William Ergen practices Gastroenterology Physician in Knoxville, TN.
Where does Dr. William Ergen practice?
Dr. William Ergen practices at 1311 Dowell Springs Blvd, Knoxville, TN 379092454. Office phone: 8655885121.
What is Dr. William Ergen's NPI?
Dr. William Ergen's National Provider Identifier (NPI) is 1710249529, issued by NPPES.
Does Dr. William Ergen accept Medicare assignment?
Yes. Dr. William Ergen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Ergen commonly perform?
Top Medicare-reported procedures in 2023: Injection, vedolizumab, 1 mg (HCPCS J3380); Established patient office or other outpatient visit (HCPCS 99213); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385). Source: CMS Medicare Physician & Other Practitioners file.