DR. ERIC CHRISTOFF M.D.
NPI 1245287317
Internal Medicine in Chicago, IL
About Dr. Eric Christoff M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ERIC CHRISTOFF M.D. (NPI 1245287317) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036-094098) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Advocate Illinois Masonic Medical Center, and is a graduate of Toledo Medical College (1994).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Dr. Eric Christoff 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 Reassignments
2Medicare enrollment records show Eric Christoff reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60626
- Reassigned Medicare billing, Illinois enrollment
- 143 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Illinois Masonic Medical Center
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60626 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 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60626
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 Eric Christoff's NPI number?
The NPI number for Eric Christoff is 1245287317. It was assigned to this individual provider in the NPPES registry on May 27, 2006.
Where is Eric Christoff located?
Eric Christoff practices at 6500 N Clark St, Chicago, IL 60626. The listed phone number is (773) 388-1600.
What is Eric Christoff's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Eric Christoff enrolled in Medicare?
Yes. Eric Christoff 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 organizations bill Medicare for Eric Christoff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Eric Christoff reassigns Medicare benefits to 2 organizations: Howard Brown Health Center (Chicago, IL) and Northwestern Medical Faculty Foundation (Carol Stream, IL). Each 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 Eric Christoff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Eric Christoff accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Eric Christoff 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 Eric Christoff affiliated with any hospitals?
According to CMS data, Eric Christoff is affiliated with Advocate Illinois Masonic Medical Center.
When was this NPI record last updated?
The NPPES record for Eric Christoff was last updated on December 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Eric Christoff, M.D. · NPI 1245287317
Internal Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since May 27, 2006.
## Identity
- **NPI:** 1245287317 (Entity type: Individual)
- **Enumerated:** May 27, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 036-094098 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 6500 N CLARK ST, Chicago, IL 60626-4097
- **Phone:** (773) 388-1600
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Howard Brown Health Center (NPI 1912382227, Chicago, IL); Northwestern Medical Faculty Foundation (NPI 1346235314, Carol Stream, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Toledo Medical College, class of 1994
## Record status
- **NPPES last updated:** December 19, 2021
- **Other identifiers:** Other 036094098 (IL); Medicaid 036-094098 (IL); Other 336055257 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1245287317) · Data from the CMS NPPES public registry.