Quick answers
- Which hospitals does Michael P. O'Neil work at?
- Medicare's official clinician data lists Michael P. O'Neil at 2 hospitals: Cheyenne Regional Medical Center and Medical Center of the Rockies. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael P. O'Neil see patients?
- Medicare's clinician data lists 2 practice locations, including Cheyenne, WY and Loveland, CO. Call before your visit to confirm the address.
- What is Michael P. O'Neil's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Michael P. O'Neil accept Medicare assignment?
- Yes. Medicare's clinician data says Michael P. O'Neil 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 Michael P. O'Neil?
- (307) 634-2273, as listed in official Medicare / NPI Registry data.
- What is Michael P. O'Neil's NPI number?
- 1336160068. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael P. O'Neil works
Medicare's Facility Affiliation Data lists Michael P. O'Neil at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cheyenne Regional Medical CenterCheyenne, WY · Acute Care Hospital · CCN 530014
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · CCN 060119
Practice locations
Addresses where Michael P. O'Neil is enrolled with Medicare (CMS data updated 2026-10-02).
- 214 E 23rd StCheyenne, WY 82001 (307) 634‑2273
- 2500 Rocky Mountain AveLoveland, CO 80538
Group practices
Medicare enrollment lists Michael P. O'Neil as a member of these groups (CMS data updated 2026-10-02).
- Northern Colorado Anesthesia Professionals PLLC160 clinicians in the group
- Anesthesiology Consultants of Cheyenne LLC17 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Cheyenne
Clinicians with the same Medicare primary specialty in Cheyenne, WY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336160068 |
| 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