John P. Karagiannis, M.D.
Gastroenterology Physician · South Bend, IN
John P. Karagiannis, M.D. is a gastroenterology physician with a practice address in South Bend, Indiana, and NPI 1386647170, issued on May 24, 2005. Check the license (Indiana 01041123A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- John P. Karagiannis
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 01041123A IN
Self-reported in NPPES; status is on the state search - Practice location
- 621 Memorial Dr Ste 511, South Bend, IN 46601
- Phone
- (574) 544-5580
- Enumerated
- May 24, 2005
- Record last updated
- Jun 25, 2026
- Fax
- (574) 544-5579
- Medicaid ID
- 100114340 IN
- Medicare enrollment
- Enrolled (PECOS I20100830000506); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 372 in Indiana → Look up another NPI →
Also registered at 621 Memorial Dr Ste 511
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Luis Nidea, MDGastroenterology Physician1154311751
- Zuhair Yaseen, MDGastroenterology Physician1093705675
Verify John P. Karagiannis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01041123ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average gastroenterology physician in 2024
2,081 Medicare Part D claims for 882 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Pantoprazole Sodium695 claims
- Peg 3350-Electrolyte333 claims
- Famotidine312 claims
- Sod Sulf-Potass Sulf-Mag Sulf198 claims
- Omeprazole139 claims
- Mesalamine43 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.
The MIPS final score for 2023 (Medicare payment program): 78.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $401.56
21 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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.
Bills Medicare through one group practice
- Privia Medical Group Indiana LLCElkhart, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John P. Karagiannis among 372 gastroenterology physician records in Indiana
John P. Karagiannis, 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 fileYes · 73% of these records are
- Graduated1987 · median 2001 among the 272 with a school on file
- Record last updated2026 · 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
- Luis Nidea, MDSouth Bend, IN 466011154311751
- Zuhair Yaseen, MDSouth Bend, IN 466011093705675
- James Harig, M.D.Warsaw, IN 465801386690865
- Oliver Gilliam, M.D.South Bend, IN 466351497759765
- 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
Common questions
What is John P. Karagiannis, M.D.'s NPI number?
John P. Karagiannis, M.D.'s National Provider Identifier (NPI) is 1386647170, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John P. Karagiannis, M.D. located?
The NPPES record lists a practice address at 621 Memorial Dr Ste 511, South Bend, IN, 46601. Phone: (574) 544-5580. Providers update this record themselves, so call before visiting.
How can I verify John P. Karagiannis, M.D.'s license?
NPPES lists Indiana license number 01041123A, 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 John P. Karagiannis, M.D. prescribe under Medicare Part D?
In 2024, John P. Karagiannis, M.D. had 2,081 Medicare Part D claims for 882 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is John P. Karagiannis, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.