Quick answers
- Which hospitals does Corey J. Ketchem work at?
- Medicare's official clinician data lists Corey J. Ketchem at 3 hospitals: Northwestern Lake Forest Hospital, Northwestern Medicine Central Dupage Hospital and Northwestern Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Corey J. Ketchem see patients?
- Medicare's clinician data lists 1 practice location in Chicago, IL. Call before your visit to confirm the address.
- What is Corey J. Ketchem's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Corey J. Ketchem accept Medicare assignment?
- Yes. Medicare's clinician data says Corey J. Ketchem 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 Corey J. Ketchem offer telehealth?
- Medicare's clinician data says Corey J. Ketchem offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Corey J. Ketchem?
- (312) 926-5620, as listed in official Medicare / NPI Registry data.
- What is Corey J. Ketchem's NPI number?
- 1043743446. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Corey J. Ketchem works
Medicare's Facility Affiliation Data lists Corey J. Ketchem at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
Practice locations
Addresses where Corey J. Ketchem is enrolled with Medicare (CMS data updated 2026-10-02).
- 259 E Erie St, Suite 1600Chicago, IL 60611 (312) 926‑5620
Group practices
Medicare enrollment lists Corey J. Ketchem as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Louisville School Of Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1043743446 |
| 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