Quick answers
- Which hospitals does Robert A. Bayer work at?
- Medicare's official clinician data lists Robert A. Bayer at 5 hospitals: Northwestern Medicine Central Dupage Hospital, Northwestern Medicine Delnor Community Hospital, Northwestern Medicine Kishwaukee Hospital, Northwestern Medicine McHenry and Valley West Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert A. Bayer see patients?
- Medicare's clinician data lists 3 practice locations, including Dekalb, IL and Geneva, IL. Call before your visit to confirm the address.
- What is Robert A. Bayer's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does Robert A. Bayer accept Medicare assignment?
- Yes. Medicare's clinician data says Robert A. Bayer 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 Robert A. Bayer offer telehealth?
- Medicare's clinician data says Robert A. Bayer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Robert A. Bayer?
- (815) 756-4722, as listed in official Medicare / NPI Registry data.
- What is Robert A. Bayer's NPI number?
- 1669527818. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert A. Bayer works
Medicare's Facility Affiliation Data lists Robert A. Bayer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine Delnor Community HospitalGeneva, IL · Acute Care Hospital · CCN 140211
- Northwestern Medicine Kishwaukee HospitalDekalb, IL · Acute Care Hospital · CCN 140286
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- Valley West Community HospitalSandwich, IL · Critical Access Hospital · CCN 141340
Practice locations
Addresses where Robert A. Bayer is enrolled with Medicare (CMS data updated 2026-10-02).
- 10 Health Services DrDekalb, IL 60115 (815) 756‑4722
- 304 Randall RdGeneva, IL 60134 (630) 307‑7799
- 5 Kish Hospital DrDekalb, IL 60115 (630) 232‑0280
Group practices
Medicare enrollment lists Robert A. Bayer as a member of these groups (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Central Dupage Physician Group1,080 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Dekalb
Clinicians with the same Medicare primary specialty in Dekalb, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1669527818 |
| 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