KHAJA M. SIRAJ D.O.
NPI 1568993657
Internal Medicine - Critical Care Medicine in Downers Grove, IL
About Khaja M. Siraj D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KHAJA M. SIRAJ D.O. (NPI 1568993657) is an individual critical care medicine provider in Downers Grove, Illinois, licensed in Illinois (036.150771) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Advocate Good Samaritan Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 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
Khaja M. Siraj D.o. 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 Khaja Siraj reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Downers Grove, IL 60515
- Reassigned Medicare billing, Illinois enrollment
- Also billed through NPI 1629441027 (Illinois)
- 4,870 clinicians in this Medicare group
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.
Areas of Expertise CMS Part B claims 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Good Samaritan Hospital
Acute Care Hospitals · Downers Grove, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60515 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DOWERS GROVE, IL 60515
DOWNERS GROVE, IL 60515
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 Khaja Siraj's NPI number?
The NPI number for Khaja Siraj is 1568993657. It was assigned to this individual provider in the NPPES registry on March 21, 2017.
Where is Khaja Siraj located?
Khaja Siraj practices at 3815 Highland Avenue Suite Aip, Downers Grove, IL 60515. The listed phone number is (708) 283-5500.
What is Khaja Siraj's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Khaja Siraj enrolled in Medicare?
Yes. Khaja Siraj 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 Khaja Siraj's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Khaja Siraj reassigns Medicare benefits to 2 organizations: Advocate Health And Hospitals Corporation (Downers Grove, IL) and Endeavor Health Medical Group (Evanston, 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 Khaja Siraj's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Khaja Siraj accept?
Health plans from Ambetter Health list Khaja Siraj 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 Khaja Siraj affiliated with any hospitals?
According to CMS data, Khaja Siraj is affiliated with Advocate Good Samaritan Hospital.
When was this NPI record last updated?
The NPPES record for Khaja Siraj was last updated on July 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Khaja M. Siraj, D.O. · NPI 1568993657
Critical Care Medicine physician in Downers Grove, Illinois. Individual provider, active in the CMS NPPES registry since March 21, 2017.
## Identity
- **NPI:** 1568993657 (Entity type: Individual)
- **Enumerated:** March 21, 2017
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 036.150771 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 3815 HIGHLAND AVENUE, SUITE AIP, Downers Grove, IL 60515-1500
- **Phone:** (708) 283-5500
## 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): Advocate Health And Hospitals Corporation (NPI 1578670543, Downers Grove, IL); Endeavor Health Medical Group (NPI 1497701882, Evanston, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Kentucky University Medical Department, class of 2017
## Record status
- **NPPES last updated:** July 8, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1568993657) · Data from the CMS NPPES public registry.