Quick answers
- Which hospitals does Ian S. Katznelson work at?
- Medicare's official clinician data lists Ian S. Katznelson at 5 hospitals: Northwest Community Hospital 1, Northwestern Lake Forest Hospital, Northwestern Medicine Central Dupage Hospital, Northwestern Medicine McHenry and Northwestern Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ian S. Katznelson see patients?
- Medicare's clinician data lists 15 practice locations, including Lake Forest, IL, Grayslake, IL and Evanston, IL. Call before your visit to confirm the address.
- What is Ian S. Katznelson's specialty?
- Medicare lists Neurology as the primary specialty.
- Does Ian S. Katznelson accept Medicare assignment?
- Yes. Medicare's clinician data says Ian S. Katznelson 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 Ian S. Katznelson offer telehealth?
- Medicare's clinician data says Ian S. Katznelson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ian S. Katznelson?
- (847) 735-8500, as listed in official Medicare / NPI Registry data.
- What is Ian S. Katznelson's NPI number?
- 1194779082. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ian S. Katznelson works
Medicare's Facility Affiliation Data lists Ian S. Katznelson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · CCN 140252
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
Practice locations
Addresses where Ian S. Katznelson is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 15; the Medicare profile lists all.
- 1200 N Westmoreland Rd, Suite 100Lake Forest, IL 60045 (847) 735‑8500
- 1475 E Belvidere RdGrayslake, IL 60030
- 1630 Sherman AveEvanston, IL 60201
- 2635 Church Rd, Suite 101Aurora, IL 60502 (630) 315‑6900
- 2701 Patriot BlvdGlenview, IL 60026
Group practices
Medicare enrollment lists Ian S. Katznelson as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Lake Forest
Clinicians with the same Medicare primary specialty in Lake Forest, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Womans Medical School |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1194779082 |
| 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