Quick answers
- Which hospitals does O'Brien E. Mellars work at?
- Medicare's official clinician data lists O'Brien E. Mellars at 2 hospitals: Cheyenne Regional Medical Center and Poudre Valley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does O'Brien E. Mellars see patients?
- Medicare's clinician data lists 1 practice location in Cheyenne, WY. Call before your visit to confirm the address.
- What is O'Brien E. Mellars's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does O'Brien E. Mellars accept Medicare assignment?
- Yes. Medicare's clinician data says O'Brien E. Mellars 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 O'Brien E. Mellars offer telehealth?
- Medicare's clinician data says O'Brien E. Mellars offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for O'Brien E. Mellars?
- (307) 634-1311, as listed in official Medicare / NPI Registry data.
- What is O'Brien E. Mellars's NPI number?
- 1174407621. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where O'Brien E. Mellars works
Medicare's Facility Affiliation Data lists O'Brien E. Mellars 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
- Poudre Valley HospitalFort Collins, CO · Acute Care Hospital · CCN 060010
Practice locations
Addresses where O'Brien E. Mellars is enrolled with Medicare (CMS data updated 2026-10-02).
- 5050 Powderhouse RdCheyenne, WY 82009 (307) 634‑1311
Group practices
Medicare enrollment lists O'Brien E. Mellars as a member of this group (CMS data updated 2026-10-02).
- Poudre Valley Medical Group LLC2,440 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Cheyenne
Clinicians with the same Medicare primary specialty in Cheyenne, WY — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1174407621 |
| 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