KAREN E SEIN OHN MD
NPI 1518119536
Internal Medicine - Gastroenterology in Granite City, IL
About Karen E Sein Ohn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN E SEIN OHN MD (NPI 1518119536) is an individual gastroenterology provider in Granite City, Illinois, licensed in Michigan (4301069021) and active in the NPI registry since October 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Grand Rapids.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Karen E Sein Ohn Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Karen Sein Ohn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Waterloo, IL 62298
- Reassigned Medicare billing, Illinois enrollment
- 228 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 62040 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRANITE CITY, IL 62040
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Karen Sein Ohn's NPI number?
The NPI number for Karen Sein Ohn is 1518119536. It was assigned to this individual provider in the NPPES registry on October 22, 2008.
Where is Karen Sein Ohn located?
Karen Sein Ohn practices at 2100 Madison Ave, Granite City, IL 62040. The listed phone number is (618) 798-3000.
What is Karen Sein Ohn's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Karen Sein Ohn enrolled in Medicare?
Yes. Karen Sein Ohn is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Karen Sein Ohn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Sein Ohn reassigns Medicare benefits to Deaconess Illinois Specialty Clinic, Inc. (Waterloo, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karen Sein Ohn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Sein Ohn accept?
Health plans from CareSource list Karen Sein Ohn as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Karen Sein Ohn was last updated on July 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Karen E Sein Ohn, MD · NPI 1518119536
Gastroenterology physician in Granite City, Illinois. Individual provider, active in the CMS NPPES registry since October 22, 2008.
## Identity
- **NPI:** 1518119536 (Entity type: Individual)
- **Enumerated:** October 22, 2008
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 4301069021 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 2100 MADISON AVE, Granite City, IL 62040-4713
- **Phone:** (618) 798-3000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Deaconess Illinois Specialty Clinic, Inc. (NPI 1336856806, Waterloo, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 14, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1518119536) · Data from the CMS NPPES public registry.