Robert M. Siwiec, M.D.
Gastroenterology Physician · Carmel, IN
Robert M. Siwiec, M.D. is a gastroenterology physician with a practice address in Carmel, Indiana, and NPI 1184880676, issued on Aug 4, 2008. Check the license (Indiana 01070921A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Robert M. Siwiec
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 01070921A IN
036122288 IL
5272620 WI
Self-reported in NPPES; status is on the state search - Practice location
- 11725 Illinois St Ste 275, Carmel, IN 46032
- Phone
- (317) 944-0980
- Enumerated
- Aug 4, 2008
- Record last updated
- Mar 11, 2025
- Fax
- (317) 968-1348
- Medicaid ID
- 201059780 IN
- Medicare enrollment
- Enrolled (PECOS I20120613000472); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 372 in Indiana → Look up another NPI →
Also registered at 11725 Illinois St Ste 275
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Noah Parker, MDOtolaryngology Physician1215100706
- Mark Partain, AUDAudiologist1780238907
- Taha Shipchandler, M.D.Otolaryngology Physician1023288230
Verify Robert M. Siwiec in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01070921ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average gastroenterology physician in 2024
814 Medicare Part D claims for 179 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Omeprazole95 claims
- Ondansetron Odt55 claims
- Famotidine48 claims
- Linzess48 claims
- Dicyclomine Hcl40 claims
- Pantoprazole Sodium38 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.
Bills Medicare through one group practice
- IU Health Medical Group LLCIndianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert M. Siwiec among 372 gastroenterology physician records in Indiana
Robert M. Siwiec, 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 2008, is newer than 64% of them.
- NPI issued2008 · 64% of these records are older, 30% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2006 · median 2001 among the 272 with a school on file
- Record last updated2025 · 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 Carmel → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Murad Aburajab, MDCarmel, IN 460321376750745
- Richard Foster, MDCarmel, IN 460321942356555
- Ashley Gilmore, MDCarmel, IN 460321215163688
- Daniel Stout, MDCarmel, IN 460321336199603
- Sebastian Strobel, MDCarmel, IN 460321346444759
- Sweta Tandra, MDCarmel, IN 460321124193685
- Sujaata Dwadasi, M.D.Fishers, IN 460371609295518
- John Christopher Tang, D.O.Fishers, IN 460371346458825
Common questions
What is Robert M. Siwiec, M.D.'s NPI number?
Robert M. Siwiec, M.D.'s National Provider Identifier (NPI) is 1184880676, issued on Aug 4, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Robert M. Siwiec, M.D. located?
The NPPES record lists a practice address at 11725 Illinois St Ste 275, Carmel, IN, 46032. Phone: (317) 944-0980. Providers update this record themselves, so call before visiting.
How can I verify Robert M. Siwiec, M.D.'s license?
NPPES lists Indiana license number 01070921A, 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 Robert M. Siwiec, M.D. prescribe under Medicare Part D?
In 2024, Robert M. Siwiec, M.D. had 814 Medicare Part D claims for 179 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.