Quick answers
- Which hospitals does Christopher I. Mackay work at?
- Medicare's official clinician data lists Christopher I. Mackay at 5 hospitals: Aspirus Medford Hospital & Clinics, Inc, Aspirus Riverview Hospital & Clinics Inc, Aspirus Wausau Hospital, Marshfield Medical Center and Marshfield Medical Center - Weston. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Christopher I. Mackay see patients?
- Medicare's clinician data lists 1 practice location in Wausau, WI. Call before your visit to confirm the address.
- What is Christopher I. Mackay's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does Christopher I. Mackay accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher I. Mackay 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 Christopher I. Mackay offer telehealth?
- Medicare's clinician data says Christopher I. Mackay offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Christopher I. Mackay?
- (715) 396-3191, as listed in official Medicare / NPI Registry data.
- What is Christopher I. Mackay's NPI number?
- 1538269402. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Christopher I. Mackay works
Medicare's Facility Affiliation Data lists Christopher I. Mackay at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aspirus Medford Hospital & Clinics, IncMedford, WI · Critical Access Hospital · CCN 521324
- Aspirus Riverview Hospital & Clinics IncWisconsin Rapids, WI · Acute Care Hospital · CCN 520033
- Aspirus Wausau HospitalWausau, WI · Acute Care Hospital · CCN 520030
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · CCN 520037
- Marshfield Medical Center - WestonWeston, WI · Acute Care Hospital · CCN 520202
Practice locations
Addresses where Christopher I. Mackay is enrolled with Medicare (CMS data updated 2026-10-02).
- 505 S 24th Ave, Suite 200Wausau, WI 54401 (715) 396‑3191
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Ottawa, Faculty Of Medicine |
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1538269402 |
| 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