Quick answers
- Which hospitals does David S. Sager work at?
- Medicare's official clinician data lists David S. Sager at 5 hospitals: Advocate Condell Medical Center, Advocate Lutheran General Hospital, Northshore University Healthsystem - Evanston Hospital, Northwest Community Hospital 1 and Northwestern Medicine Central Dupage Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David S. Sager see patients?
- Medicare's clinician data lists 1 practice location in Des Plaines, IL. Call before your visit to confirm the address.
- What is David S. Sager's specialty?
- Medicare lists Rheumatology as the primary specialty, and also Internal Medicine.
- Does David S. Sager accept Medicare assignment?
- Yes. Medicare's clinician data says David S. Sager 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.
- Does David S. Sager offer telehealth?
- Medicare's clinician data says David S. Sager offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for David S. Sager?
- (847) 800-0998, as listed in official Medicare / NPI Registry data.
- What is David S. Sager's NPI number?
- 1295850766. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David S. Sager works
Medicare's Facility Affiliation Data lists David S. Sager at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Condell Medical CenterLibertyville, IL · Acute Care Hospital · CCN 140202
- Advocate Lutheran General HospitalPark Ridge, IL · Acute Care Hospital · CCN 140223
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · CCN 140010
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · CCN 140252
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
Practice locations
Addresses where David S. Sager is enrolled with Medicare (CMS data updated 2026-10-02).
- 150 N River Rd, Suite 270Des Plaines, IL 60016 (847) 800‑0998
Group practices
Medicare enrollment lists David S. Sager as a member of this group (CMS data updated 2026-10-02).
- Rheumatic Disease Center Physicians SC4 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Des Plaines
Clinicians with the same Medicare primary specialty in Des Plaines, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Illinois Medical College |
| Graduation year | 1973 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1295850766 |
| 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