Quick answers
- Which hospitals does Zaher Qassem work at?
- Medicare's official clinician data lists Zaher Qassem at 5 hospitals: CGH Medical Center, FHN Memorial Hospital, Javon Bea Hospital, Mercy Health System Corp and Mercy Walworth Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Zaher Qassem see patients?
- Medicare's clinician data lists 5 practice locations, including Freeport, IL, Rockford, IL and Stockton, IL. Call before your visit to confirm the address.
- What is Zaher Qassem's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Critical Care (Intensivists), Geriatric Medicine and Internal Medicine.
- Does Zaher Qassem accept Medicare assignment?
- Yes. Medicare's clinician data says Zaher Qassem accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Zaher Qassem?
- (815) 599-6000, as listed in official Medicare / NPI Registry data.
- What is Zaher Qassem's NPI number?
- 1366551996. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Zaher Qassem works
Medicare's Facility Affiliation Data lists Zaher Qassem at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CGH Medical CenterSterling, IL · Acute Care Hospital · CCN 140043
- FHN Memorial HospitalFreeport, IL · Acute Care Hospital · CCN 140160
- Javon Bea HospitalRockford, IL · Acute Care Hospital · closed, according to its website · CCN 140239
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
- Mercy Walworth Hospital & Medical CenterLake Geneva, WI · Critical Access Hospital · CCN 521357
Practice locations
Addresses where Zaher Qassem is enrolled with Medicare (CMS data updated 2026-10-02).
- 1045 W Stephenson StFreeport, IL 61032 (815) 599‑6000
- 2350 N Rockton AveRockford, IL 61103 (815) 971‑2000
- 25 N Harlem AveFreeport, IL 61032 (815) 599‑7750
- 600 N Rush StStockton, IL 61085 (815) 947‑3211
- 8201 E Riverside BlvdRockford, IL 61114 (815) 971‑2000
Group practices
Medicare enrollment lists Zaher Qassem as a member of these groups (CMS data updated 2026-10-02).
- Rockford Health Physicians521 clinicians in the group
- Freeport Memorial Hospital178 clinicians in the group
- Freeport Regional Health Care Foundation92 clinicians in the group
Specialties
Other pulmonologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366551996 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians