Doctor profile · Federal record
Dr. John Tasiopoulos, D.O.
Gastroenterology Physician (CMS: Gastroenterology) · Libertyville, IL
- NPI 1346384492
- Accepts Medicare
- 35 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1880 W Winchester RD, Suite 201
Libertyville, IL 600485341
(847) 247-0187
fax (847) 247-0487
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- December 13, 2021
- Year of graduation
- 1991 — 35 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Illinois #207RG0100X
- Medicaid
- IL #036-087154
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346384492. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,208
Distinct HCPCS
10
Medicare allowed
$297,135
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 387 | 327 | $134 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 271 | 271 | $176 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 230 | 227 | $432 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 166 | 160 | $314 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 45 | 45 | $322 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 32 | 32 | $489 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 23 | 22 | $279 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 20 | 20 | $276 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 18 | 18 | $96 | |
45381 |
Injection beneath lining of large bowel using a flexible endoscope | 16 | 16 | $134 |
In context: peer comparison
Among 4 peers in Libertyville Gastroenterology Physician, average services per provider: 84. This provider delivers 14× the peer median.Open Payments
Industry payments received
All-time total
$3,897
Transactions
189
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 45 | $873.21 | |
| Janssen Biotech, INC. | 16 | $566.75 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 20 | $415.86 | |
| Takeda Pharmaceuticals U.S.A., INC. | 21 | $347.77 | |
| Lilly USA, LLC | 14 | $249.88 | |
| Pfizer INC. | 27 | $181.59 | |
| Qol Medical, LLC | 7 | $157.97 | |
| Phathom Pharmaceuticals, INC. | 9 | $135.35 | |
| Ardelyx, INC. | 11 | $132.50 | |
| Sandoz INC. | 4 | $107.32 | |
| Celgene Corporation | 5 | $90.54 | |
| Gilead Sciences, INC. | 3 | $78.73 | |
| Intercept Pharmaceuticals, INC. | 3 | $75.27 | |
| Genzyme Corporation | 2 | $62.23 | |
| Daiichi Sankyo INC. | 2 | $53.62 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,275
Patients
328
Total drug cost
$229,693
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 861 | 247 | $15,179 |
| Omeprazole | Generic | 90 | 26 | $1,496 |
| Famotidine | Generic | 58 | 20 | $1,867 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 53 | 19 | $4,784 |
| Mesalamine | Generic | 35 | 0 | $23,524 |
| Creon (Lipase/Protease/Amylase) | Brand | 23 | 0 | $91,578 |
| Budesonide Dr (Budesonide) | Brand | 22 | 0 | $3,166 |
| Amitriptyline Hcl | Generic | 20 | 0 | $256 |
| Sucralfate | Generic | 20 | 0 | $819 |
| Sulfasalazine | Generic | 20 | 0 | $313 |
Hospital affiliations
Frequently asked questions
What is Dr. John Tasiopoulos's medical specialty?
Dr. John Tasiopoulos practices Gastroenterology Physician in Libertyville, IL.
Where does Dr. John Tasiopoulos practice?
Dr. John Tasiopoulos practices at 1880 W Winchester RD, Libertyville, IL 600485341. Office phone: 8472470187.
What is Dr. John Tasiopoulos's NPI?
Dr. John Tasiopoulos's National Provider Identifier (NPI) is 1346384492, issued by NPPES.
Does Dr. John Tasiopoulos accept Medicare assignment?
Yes. Dr. John Tasiopoulos accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Tasiopoulos commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.