Quick answers
- Does Theresa Keegan accept Medicare assignment?
- Yes. Medicare's clinician data says Theresa Keegan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Theresa Keegan's NPI number?
- 1619797537. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Theresa Keegan works
Medicare's Facility Affiliation Data lists Theresa Keegan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Advocate Illinois Masonic Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140182
Practice locations
Addresses where Theresa Keegan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1520 W Harrison StChicago, IL 60607 (888) 352‑7874
- 845 N Michigan Ave, Suite 985wChicago, IL 60611 (312) 521‑5500
Group practices
Medicare enrollment lists Theresa Keegan as a member of these groups (CMS data updated October 2, 2026).
- North American Partners in Anesthesia Illinois LLC431 clinicians in the group
- University Anesthesiologists SC151 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Illinois →
Other nurse anesthetists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Other clinicians in North American Partners in Anesthesia Illinois LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619797537 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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