Karen E. Sein Ohn, MD
Gastroenterology Physician · Granite City, IL
Karen E. Sein Ohn, MD is a gastroenterology physician with a practice address in Granite City, Illinois, and NPI 1518119536, issued on Oct 22, 2008. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Karen E. Sein Ohn
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 4301069021 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2100 Madison Ave, Granite City, IL 62040
- Phone
- (618) 798-3000
- Enumerated
- Oct 22, 2008
- Record last updated
- Jul 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 2100 Madison Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Oladele Ajao, MDInternal Medicine Physician1700829025
- Jeffrey Arendell, DOEmergency Medicine Physician1386668218
- Laurie Beebe, MS, RD, LDMetabolic Nutrition Registered Dietitian1295954980
- Mary Bigongiari, CRNACertified Registered Nurse Anesthetist1598740284
- David Bogolub, DOEmergency Medicine Physician1245279181
- Melissa Bounds, NPFamily Nurse Practitioner1831630458
Verify Karen E. Sein Ohn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average gastroenterology physician in 2024
561 Medicare Part D claims for 168 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Omeprazole183 claims
- Ondansetron Hcl48 claims
- Zenpep37 claims
- Pantoprazole Sodium32 claims
- Gavilyte-G31 claims
- Carvedilol25 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 practice group's MIPS final score for 2023 (Medicare payment program): 73.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,153.50
50 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.
Karen E. Sein Ohn among 887 gastroenterology physician records in Illinois
Karen E. Sein Ohn, MD is one of 887 gastroenterology physician records with a practice address in Illinois. 85% 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 55% of them.
- NPI issued2008 · 55% of these records are older, 39% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2021 · 49% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Illinois
There are 887 gastroenterology physician records in Illinois.
All 887 in Illinois → Every provider in Granite City → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Mei Huang, M.D.Edwardsville, IL 620251417972597
- David Lotsoff, M.D.Edwardsville, IL 620251205807328
- Mark Fedder, MDMaryville, IL 620621922009943
- Edmundo Rodriguez-Frias, MDMaryville, IL 620621912117912
- Francisco Tagle, MDMaryville, IL 620621588323356
- Mark Allendorph, M.D.Alton, IL 620021922094002
- Ahmad Karadaghy, M.D.Alton, IL 620021619963063
- Khalid Naseer, MDAlton, IL 620021851341366
Common questions
What is Karen E. Sein Ohn, MD's NPI number?
Karen E. Sein Ohn, MD's National Provider Identifier (NPI) is 1518119536, issued on Oct 22, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Karen E. Sein Ohn, MD located?
The NPPES record lists a practice address at 2100 Madison Ave, Granite City, IL, 62040. Phone: (618) 798-3000. Providers update this record themselves, so call before visiting.
How can I verify Karen E. Sein Ohn, MD's license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen E. Sein Ohn, MD prescribe under Medicare Part D?
In 2024, Karen E. Sein Ohn, MD had 561 Medicare Part D claims for 168 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Karen E. Sein Ohn, MD's MIPS final score?
The 2023 MIPS final score is 73.9 of 100, reported for the practice group. 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.