DR. GEORGE RONEN NISSAN DO
NPI 1245222033
Internal Medicine in Chicago, IL
About Dr. George Ronen Nissan Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GEORGE RONEN NISSAN DO (NPI 1245222033) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036108447) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Presence Saint Joseph Hospital - Chicago, and maintains a secondary practice location in Glenview.
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 and accepts Medicare assignment
Dr. George Ronen Nissan Do 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
3Medicare enrollment records show George Nissan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 clinicians in this Medicare group
Heath, TX 75032
- Reassigned Medicare billing, Texas enrollment
- 3,167 clinicians in this Medicare group
Plano, TX 75024
- Reassigned Medicare billing, Texas enrollment
- 7 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 6
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Presence Saint Joseph Hospital - Chicago
Acute Care Hospitals · Chicago, ILNorthwest Community Hospital 1
Acute Care Hospitals · Arlington Heights, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60642 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 13
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 George Nissan's NPI number?
The NPI number for George Nissan is 1245222033. It was assigned to this individual provider in the NPPES registry on August 17, 2005.
Where is George Nissan located?
George Nissan practices at 1460 N Halsted St Ste 501, Chicago, IL 60642. The listed phone number is (773) 388-6390.
What is George Nissan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is George Nissan enrolled in Medicare?
Yes. George Nissan 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 George Nissan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), George Nissan reassigns Medicare benefits to 3 organizations: Endeavor Health Medical Group (Evanston, IL), Healthtexas Provider Network (Heath, TX) and North Texas Institute Of Neurology And Headache, PA (Plano, TX). 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 George Nissan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does George Nissan accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list George Nissan 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 George Nissan affiliated with any hospitals?
According to CMS data, George Nissan is affiliated with Presence Saint Joseph Hospital - Chicago and Northwest Community Hospital 1.
When was this NPI record last updated?
The NPPES record for George Nissan was last updated on August 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. George Ronen Nissan, DO · NPI 1245222033
Internal Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since August 17, 2005.
## Identity
- **NPI:** 1245222033 (Entity type: Individual)
- **Enumerated:** August 17, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 036108447 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1460 N HALSTED ST STE 501, Chicago, IL 60642-2615
- **Phone:** (773) 388-6390 · **Fax:** (312) 867-7101
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Endeavor Health Medical Group (NPI 1497701882, Evanston, IL); Healthtexas Provider Network (NPI 1538164116, Heath, TX); North Texas Institute Of Neurology And Headache, PA (NPI 1609101906, Plano, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Midwestern University, Chicago College Of Osteopathic Med, class of 1999
## Record status
- **NPPES last updated:** August 8, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1245222033) · Data from the CMS NPPES public registry.