William Byer, CRNA
NPI 1285921403 · Certified Registered Nurse Anesthetist · Bar Harbor, ME
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Byer, CRNA is a Certified Registered Nurse Anesthetist provider in Bar Harbor, ME (NPI 1285921403).
Provider details
- NPI number
- 1285921403
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNA
- Sex
- Male
- Sole proprietor
- No
- License
- 9242790 (FL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
14 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
- 2011-07-08
- Last updated
- 2020-09-28
- Certified
- 2020-09-28
Frequently asked questions
- What is William Byer's NPI number?
- William Byer's National Provider Identifier (NPI) is 1285921403, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Byer's specialty?
- William Byer is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Byer located?
- William Byer's practice location on file with NPPES is 10 Wayman Ln, Bar Harbor, ME 04609-1625.
- What is William Byer's phone number?
- The practice phone number listed in the NPPES registry for William Byer is (207) 288-5081.
- Does William Byer accept Medicare?
- William Byer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Byer's NPI active?
- Yes — William Byer's NPI (1285921403) is active in the NPPES registry as of the last update on 2020-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.