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Edit this profileAt a glance
- 17501 Generations Dr, South Bend, IN 46635
About Dr. Gilliam
Oliver D. Gilliam, M.D. is a healthcare provider in South Bend, IN specializing in gastroenterology. Medicare claims data shows Oliver provided 86 services to 86 patients. The services billed most often include removal of polyps or growths of large bowel using an endoscope with mechanical snare, colorectal cancer screening; colonoscopy on individual at high risk, and colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk. This provider record is associated with NPI 1497759765.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (574) 234-0049
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
17501 GENERATIONS DR
South Bend, IN 46635
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Chronic conditions
Liver health
Specialized and cancer
Wound care
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Advanced endoscopy
Biliary and pancreatic endoscopy
Capsule and physiology testing
- Ambulatory reflux monitoring
- Capsule endoscopy
- Hydrogen and methane breath testing
- Anorectal manometry
- Esophageal manometry
Chronic illness
Clinical Nutrition
Diagnostic Testing
Digestive
General surgery
Infection & Microbiology Tests
Liver procedures
Lower endoscopy
- Colon polyp removal
- Diagnostic colonoscopy
- Endoscopic control of gastrointestinal bleeding
- Flexible sigmoidoscopy
Nursing care
Nutrition & Digestion
Upper endoscopy
- Endoscopic mucosal resection
- Esophageal biopsy
- Esophageal dilation
- Stomach biopsy
- Endoscopic submucosal dissection
Most searched procedures
Treatments
Procedures Most Often Billed to Medicare
86 services · 86 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
61 | As often as other peers in Gastroenterology |
| Colorectal cancer screening; colonoscopy on individual at high risk | Billing code | G0105 |
13 | Less often than most peers in Gastroenterology |
| Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Billing code | G0121 |
12 | Less often than most peers in Gastroenterology |
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 gastroenterologists at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 11 related providers in 2 groups
Other gastroenterologists in South Bend 3
Same specialty, same city.
Also performs Removal of polyps or growths of large bowel using an endoscope with mechanical snare 8
Providers in IN who bill this service to Medicare most often.
Common questions
What is Oliver D. Gilliam's specialty?
Oliver D. Gilliam is a gastroenterologist in South Bend, IN. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Oliver D. Gilliam?
Oliver D. Gilliam is listed at 17501 Generations Dr, South Bend, IN 46635. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Oliver D. Gilliam?
The number on file is (574) 234-0049. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Oliver D. Gilliam?
Oliver D. Gilliam's National Provider Identifier is 1497759765. 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
How much experience does Oliver D. Gilliam have?
Oliver D. Gilliam has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What is Oliver D. Gilliam known for?
According to Medicare billing data, Oliver D. Gilliam performs procedures including removal of polyps or growths of large bowel using an endoscope with mechanical snare. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Oliver D. Gilliam's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Oliver D. Gilliam. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.