William Alonso Arias
NPI 1275822702 · Anesthesiology Physician · Las Vegas, NV
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Alonso Arias is a Anesthesiology Physician provider in Las Vegas, NV (NPI 1275822702).
Provider details
- NPI number
- 1275822702
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16233 (NV)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES 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
- 2011-04-05
- Last updated
- 2016-02-02
Frequently asked questions
- What is William Alonso Arias's NPI number?
- William Alonso Arias's National Provider Identifier (NPI) is 1275822702, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Alonso Arias's specialty?
- William Alonso Arias is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Alonso Arias located?
- William Alonso Arias's practice location on file with NPPES is 2136 E Desert Inn Rd Ste a, Las Vegas, NV 89169-3247.
- What is William Alonso Arias's phone number?
- The practice phone number listed in the NPPES registry for William Alonso Arias is (917) 684-8221.
- Does William Alonso Arias accept Medicare?
- William Alonso Arias is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Alonso Arias's NPI active?
- Yes — William Alonso Arias's NPI (1275822702) is active in the NPPES registry as of the last update on 2016-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.