O'Brien Mellars, FNP
NPI 1174407621 · Family Nurse Practitioner · Cheyenne, WY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
O'Brien Mellars, FNP is a Family Nurse Practitioner provider in Cheyenne, WY (NPI 1174407621).
Provider details
- NPI number
- 1174407621
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 50954 (WY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-08-05
- Last updated
- 2026-03-31
- Certified
- 2026-03-31
Frequently asked questions
- What is O'Brien Mellars's NPI number?
- O'Brien Mellars's National Provider Identifier (NPI) is 1174407621, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is O'Brien Mellars's specialty?
- O'Brien Mellars is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is O'Brien Mellars located?
- O'Brien Mellars's practice location on file with NPPES is 5050 Powderhouse Rd, Cheyenne, WY 82009-4800.
- What is O'Brien Mellars's phone number?
- The practice phone number listed in the NPPES registry for O'Brien Mellars is (307) 634-1311.
- Does O'Brien Mellars accept Medicare?
- O'Brien Mellars is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is O'Brien Mellars's NPI active?
- Yes — O'Brien Mellars's NPI (1174407621) is active in the NPPES registry as of the last update on 2026-03-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.