Oliver D. Gilliam, M.D.
Gastroenterology Physician · South Bend, IN
Oliver D. Gilliam, M.D. is a gastroenterology physician with a practice address in South Bend, Indiana, and NPI 1497759765, issued on Jun 2, 2005. Check the license (Indiana 01035882A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Oliver D. Gilliam
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 01035882A IN
Self-reported in NPPES; status is on the state search - Practice location
- 17501 Generations Dr, South Bend, IN 46635
- Phone
- (574) 234-0049
- Enumerated
- Jun 2, 2005
- Record last updated
- Jan 21, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (574) 251-2861
- Medicaid ID
- 100090510 IN
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 372 in Indiana → Look up another NPI →
Also registered at 17501 Generations Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Buford, NPFamily Nurse Practitioner1841969060
- Michael Manbeck, M.D.Gastroenterology Physician1649272725
- David Mark, MDGastroenterology Physician1770587339
- John Mathis, M.D.Gastroenterology Physician1427051341
- Mary Morey, FNP-BCFamily Nurse Practitioner1972500874
- Pankaj Patel, M.D.Gastroenterology Physician1124022082
Verify Oliver D. Gilliam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01035882ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average gastroenterology physician in 2024
265 Medicare Part D claims for 204 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf78 claims
- Peg 3350-Electrolyte35 claims
- Gavilyte-G33 claims
- Pantoprazole Sodium33 claims
- Peg-3350 And Electrolytes12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $376.79
22 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Oliver D. Gilliam among 372 gastroenterology physician records in Indiana
Oliver D. Gilliam, M.D. is one of 372 gastroenterology physician records with a practice address in Indiana. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 73% of these records are
- Record last updated2011 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Indiana
There are 372 gastroenterology physician records in Indiana.
All 372 in Indiana → Every provider in South Bend → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Michael Manbeck, M.D.South Bend, IN 466351649272725
- David Mark, MDSouth Bend, IN 466351770587339
- John Mathis, M.D.South Bend, IN 466351427051341
- Pankaj Patel, M.D.South Bend, IN 466351124022082
- Ravi Patel, M.D.South Bend, IN 466351750607354
- John Karagiannis, M.D.South Bend, IN 466011386647170
- Luis Nidea, MDSouth Bend, IN 466011154311751
- Zuhair Yaseen, MDSouth Bend, IN 466011093705675
Common questions
What is Oliver D. Gilliam, M.D.'s NPI number?
Oliver D. Gilliam, M.D.'s National Provider Identifier (NPI) is 1497759765, issued on Jun 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Oliver D. Gilliam, M.D. located?
The NPPES record lists a practice address at 17501 Generations Dr, South Bend, IN, 46635. Phone: (574) 234-0049. Providers update this record themselves, so call before visiting.
How can I verify Oliver D. Gilliam, M.D.'s license?
NPPES lists Indiana license number 01035882A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Oliver D. Gilliam, M.D. prescribe under Medicare Part D?
In 2024, Oliver D. Gilliam, M.D. had 265 Medicare Part D claims for 204 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.