Quick answers
- Which hospitals does Catherine Ahn work at?
- Medicare's official clinician data lists Catherine Ahn at 2 hospitals: Advocate Lutheran General Hospital and Midwestern Region Med Center, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Catherine Ahn see patients?
- Medicare's clinician data lists 6 practice locations, including Huntley, IL, Hinsdale, IL and Park Ridge, IL. Call before your visit to confirm the address.
- What is Catherine Ahn's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Catherine Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine Ahn 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 Catherine Ahn?
- (815) 759-4323, as listed in official Medicare / NPI Registry data.
- What is Catherine Ahn's NPI number?
- 1245308022. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Catherine Ahn works
Medicare's Facility Affiliation Data lists Catherine Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Lutheran General HospitalPark Ridge, IL · Acute Care Hospital · CCN 140223
- Midwestern Region Med Center, IncZion, IL · Acute Care Hospital · CCN 140100
Practice locations
Addresses where Catherine Ahn is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 10400 Haligus RdHuntley, IL 60142 (815) 759‑4323
- 120 N Oak StHinsdale, IL 60521 (630) 856‑9000
- 1775 Dempster StPark Ridge, IL 60068 (847) 723‑9454
- 1900 Hollister Dr, Suite 100Libertyville, IL 60048 (847) 367‑8100
- 2520 Elisha AveZion, IL 60099 (847) 872‑4561
Group practices
Medicare enrollment lists Catherine Ahn as a member of these groups (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
- City of Hope Medical Group of Illinois PLLC129 clinicians in the group
- Midwest Anesthesia Partners LLC119 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Huntley
Clinicians with the same Medicare primary specialty in Huntley, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245308022 |
| 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