Quick answers
- Which hospitals does Stephen Halliday work at?
- Medicare's official clinician data lists Stephen Halliday at 1 hospital: University of WI Hospitals & Clinics Authority. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen Halliday see patients?
- Medicare's clinician data lists 3 practice locations, including Freeport, IL and Madison, WI. Call before your visit to confirm the address.
- What is Stephen Halliday's specialty?
- Medicare lists Critical Care (Intensivists) as the primary specialty.
- Does Stephen Halliday accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen Halliday 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 Stephen Halliday offer telehealth?
- Medicare's clinician data says Stephen Halliday offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Stephen Halliday?
- (815) 599-6000, as listed in official Medicare / NPI Registry data.
- What is Stephen Halliday's NPI number?
- 1154612554. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen Halliday works
Medicare's Facility Affiliation Data lists Stephen Halliday at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · CCN 520098
Practice locations
Addresses where Stephen Halliday is enrolled with Medicare (CMS data updated 2026-10-02).
- 1045 W Stephenson StFreeport, IL 61032 (815) 599‑6000
- 600 Highland AveMadison, WI 53792 (608) 263‑6400
- 8501 Excelsior DrMadison, WI 53717 (815) 599‑6000
Group practices
Medicare enrollment lists Stephen Halliday as a member of these groups (CMS data updated 2026-10-02).
- University of Wisconsin Medical Foundation Inc2,553 clinicians in the group
- Freeport Memorial Hospital178 clinicians in the group
Specialties
- Critical Care (Intensivists)primary
Find other Critical Care (Intensivists) doctors in Illinois →
Other critical care doctors in Freeport
Clinicians with the same Medicare primary specialty in Freeport, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1154612554 |
| 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