DR. MUTAZZ HAJ DARWEESH M.D.
NPI 1205934395
Hospitalist in Chicago, IL
About Dr. Mutazz Haj Darweesh M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MUTAZZ HAJ DARWEESH M.D. (NPI 1205934395) is an individual hospitalist provider in Chicago, Illinois, licensed in Illinois (036.113595) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Advocate Trinity Hospital, and maintains a secondary practice location in Freeport.
NPPES Registry Identity
Specialties & Licenses 3
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. Mutazz Haj Darweesh 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
10Medicare enrollment records show Mutazz Darweesh reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60632
- Reassigned Medicare billing, Illinois enrollment
- 210 clinicians in this Medicare group
Chicago, IL 60641
- Reassigned Medicare billing, Illinois enrollment
- 122 clinicians in this Medicare group
Chicago, IL 60613
- Reassigned Medicare billing, Illinois enrollment
- 32 clinicians in this Medicare group
Chicago, IL 60613
- Reassigned Medicare billing, Illinois enrollment
- 61 clinicians in this Medicare group
Chicago, IL 60640
- Reassigned Medicare billing, Illinois enrollment
- 4 clinicians in this Medicare group
Palos Heights, IL 60463
- Reassigned Medicare billing, Illinois enrollment
- 25 clinicians in this Medicare group
Hinsdale, IL 60521
- Reassigned Medicare billing, Illinois enrollment
- 108 clinicians in this Medicare group
Oak Brook, IL 60523
- Reassigned Medicare billing, Illinois enrollment
Freeport, IL 61032
- Reassigned Medicare billing, Illinois enrollment
- 391 clinicians in this Medicare group
Freeport, IL 61032
- Reassigned Medicare billing, Illinois enrollment
- 478 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 4
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, ILThorek Memorial Hospital
Acute Care Hospitals · Chicago, ILFhn Memorial Hospital
Acute Care Hospitals · Freeport, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60609 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Mutazz Darweesh's NPI number?
The NPI number for Mutazz Darweesh is 1205934395. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is Mutazz Darweesh located?
Mutazz Darweesh practices at 1801 West 47th Street Childrens Medical Center, Chicago, IL 60609. The listed phone number is (773) 847-9004.
What is Mutazz Darweesh's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Mutazz Darweesh enrolled in Medicare?
Yes. Mutazz Darweesh 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 Mutazz Darweesh's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mutazz Darweesh reassigns Medicare benefits to 10 organizations: Saint Anthony Health Affiliates (Chicago, IL), Knd Development 59 LLC (Chicago, IL), Epss LLC- Lakeside Series (Chicago, IL), Thorek Memorial Hospital (Chicago, IL), Illinois Medical Care Ltd (Chicago, IL) and 5 more organizations, listed in the Medicare section above. 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 Mutazz Darweesh's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mutazz Darweesh accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Mutazz Darweesh 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 Mutazz Darweesh affiliated with any hospitals?
According to CMS data, Mutazz Darweesh is affiliated with Advocate Trinity Hospital, Thorek Memorial Hospital and Fhn Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Mutazz Darweesh was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Mutazz Haj Darweesh, M.D. · NPI 1205934395
Hospitalist physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since September 20, 2006.
## Identity
- **NPI:** 1205934395 (Entity type: Individual)
- **Enumerated:** September 20, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 036.113595 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1801 WEST 47TH STREET, CHILDRENS MEDICAL CENTER, Chicago, IL 60609-3872
- **Phone:** (773) 847-9004 · **Fax:** (773) 847-9008
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Saint Anthony Health Affiliates (NPI 1295757771, Chicago, IL); Knd Development 59 LLC (NPI 1447589981, Chicago, IL); Epss LLC- Lakeside Series (NPI 1861271181, Chicago, IL); Thorek Memorial Hospital (NPI 1982643961, Chicago, IL); Illinois Medical Care Ltd (NPI 1508980889, Chicago, IL); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1989
## Record status
- **NPPES last updated:** July 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1205934395) · Data from the CMS NPPES public registry.