KAREEN ROSE ELIZABETH SIMPSON M.D.
NPI 1780663963
Internal Medicine - Nephrology in Chicago, IL
About Kareen Rose Elizabeth Simpson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREEN ROSE ELIZABETH SIMPSON M.D. (NPI 1780663963) is an individual nephrology provider in Chicago, Illinois, licensed in Illinois (036105119) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS, is affiliated with Advocate Trinity Hospital, and is a graduate of Other (1992).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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 and accepts Medicare assignment
Kareen Rose Elizabeth Simpson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Kareen Simpson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chicago, IL 60661
- Reassigned Medicare billing, Illinois and Indiana enrollments
- Medicare enrollment name: Associates In Nephrology Sc
- 55 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 13
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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Trinity Hospital
Acute Care Hospitals · Chicago, ILIngalls Memorial Hospital
Acute Care Hospitals · Harvey, ILAdvocate Christ Hospital & Medical Center
Acute Care Hospitals · Oak Lawn, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60643 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Kareen Simpson's NPI number?
The NPI number for Kareen Simpson is 1780663963. It was assigned to this individual provider in the NPPES registry on January 16, 2006.
Where is Kareen Simpson located?
Kareen Simpson practices at 10801 S Western Ave Ste 201, Chicago, IL 60643. The listed phone number is (773) 770-4824.
What is Kareen Simpson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Kareen Simpson enrolled in Medicare?
Yes. Kareen Simpson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Kareen Simpson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kareen Simpson reassigns Medicare benefits to Associates In Nephrology, S.C. (Chicago, 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 Kareen Simpson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kareen Simpson accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield and Oscar Health list Kareen Simpson 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.
Is Kareen Simpson affiliated with any hospitals?
According to CMS data, Kareen Simpson is affiliated with Advocate Trinity Hospital, Ingalls Memorial Hospital and Advocate Christ Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Kareen Simpson was last updated on November 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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.
# Kareen Rose Elizabeth Simpson, M.D. · NPI 1780663963
Nephrology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since January 16, 2006.
## Identity
- **NPI:** 1780663963 (Entity type: Individual)
- **Enumerated:** January 16, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 036105119 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 10801 S WESTERN AVE STE 201, Chicago, IL 60643-3225
- **Phone:** (773) 770-4824
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Associates In Nephrology, S.C. (NPI 1184694259, Chicago, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1992
## Record status
- **NPPES last updated:** November 22, 2024
- **Other identifiers:** Medicaid 036105119 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1780663963) · Data from the CMS NPPES public registry.