OSAMA SIDDIQUI
NPI 1225512270
Internal Medicine in Evanston, IL
About Osama Siddiqui NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OSAMA SIDDIQUI (NPI 1225512270) is an individual internal medicine provider in Evanston, Illinois, licensed in Illinois (036178982) and active in the NPI registry since September 2018. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of Northwestern University Feinberg Medical School (2023).
NPPES Registry Identity
Specialties & Licenses
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
Osama Siddiqui 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 Osama Siddiqui reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 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.
Northshore University Healthsystem - Evanston Hospital
Acute Care Hospitals · Evanston, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Osama Siddiqui's NPI number?
The NPI number for Osama Siddiqui is 1225512270. It was assigned to this individual provider in the NPPES registry on September 15, 2018.
Where is Osama Siddiqui located?
Osama Siddiqui practices at 2650 Ridge Ave Ste 130, Evanston, IL 60201. The listed phone number is (847) 570-2700.
What is Osama Siddiqui's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Osama Siddiqui enrolled in Medicare?
Yes. Osama Siddiqui 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 Osama Siddiqui's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Osama Siddiqui reassigns Medicare benefits to Endeavor Health Medical Group (Evanston, 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 Osama Siddiqui's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Osama Siddiqui accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Osama Siddiqui 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 Osama Siddiqui affiliated with any hospitals?
According to CMS data, Osama Siddiqui is affiliated with Northshore University Healthsystem - Evanston Hospital.
When was this NPI record last updated?
The NPPES record for Osama Siddiqui was last updated on March 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Osama Siddiqui · NPI 1225512270
Internal Medicine physician in Evanston, Illinois. Individual provider, active in the CMS NPPES registry since September 15, 2018.
## Identity
- **NPI:** 1225512270 (Entity type: Individual)
- **Enumerated:** September 15, 2018
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 036178982 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 2650 RIDGE AVE STE 130, Evanston, IL 60201-1700
- **Phone:** (847) 570-2700
## 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:** Endeavor Health Medical Group (NPI 1265695944, Evanston, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 2023
## Record status
- **NPPES last updated:** March 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1225512270) · Data from the CMS NPPES public registry.