Doctor profile · Federal record
Dr. Oliver Gilliam, M.D.
Gastroenterology Physician · South Bend, IN
- NPI 1497759765
- 21 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
17501 Generations Dr
South Bend, IN 466351589
(574) 234-0049
fax (574) 251-2861
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- January 21, 2011
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Indiana #01035882A
- Medicaid
- IN #100090510
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1497759765. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
92
Distinct HCPCS
3
Medicare allowed
$18,057
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 58 | 58 | $232 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 19 | 19 | $163 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 15 | 15 | $101 |
In context: peer comparison
Among 6 peers in South Bend Gastroenterology Physician, average services per provider: 42. This provider delivers 2.2× the peer median.Open Payments
Industry payments received
All-time total
$377
Transactions
22
Manufacturers
10
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Gilead Sciences, INC. | 6 | $111.80 | |
| Janssen Biotech, INC. | 5 | $82.53 | |
| Takeda Pharmaceuticals U.S.A., INC. | 3 | $60.00 | |
| Boston Scientific Corporation | 2 | $40.05 | |
| Abbvie INC. | 1 | $22.99 | |
| Qol Medical, LLC | 1 | $15.04 | |
| Intercept Pharmaceuticals, INC. | 1 | $15.03 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 1 | $13.83 | |
| Ironwood Pharmaceuticals, INC | 1 | $13.12 | |
| Mauna Kea Technologies, INC. | 1 | $2.40 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
611
Patients
246
Total drug cost
$79,317
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 189 | 66 | $2,706 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 64 | 62 | $1,423 |
| Omeprazole | Generic | 60 | 21 | $1,639 |
| Mesalamine | Generic | 46 | 12 | $35,987 |
| Loperamide (Loperamide Hcl) | Brand | 41 | 0 | $1,291 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 37 | 37 | $2,621 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 31 | 31 | $471 |
| Lansoprazole | Generic | 23 | 0 | $2,943 |
| Famotidine | Generic | 20 | 0 | $801 |
| Azathioprine | Generic | 19 | 0 | $2,746 |
Frequently asked questions
What is Dr. Oliver Gilliam's medical specialty?
Dr. Oliver Gilliam practices Gastroenterology Physician in South Bend, IN.
Where does Dr. Oliver Gilliam practice?
Dr. Oliver Gilliam practices at 17501 Generations Dr, South Bend, IN 466351589. Office phone: 5742340049.
What is Dr. Oliver Gilliam's NPI?
Dr. Oliver Gilliam's National Provider Identifier (NPI) is 1497759765, issued by NPPES.
What procedures does Dr. Oliver Gilliam commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Colorectal cancer screening; colonoscopy on individual at high risk (HCPCS G0105); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.