William Cash Byer, CRNA
Certified Registered Nurse Anesthetist · Bar Harbor, ME
William Cash Byer, CRNA is a certified registered nurse anesthetist with a practice address in Bar Harbor, Maine, and NPI 1285921403, issued on Jul 8, 2011. Check the license (Maine RNA203039, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Cash Byer
- Credential
- CRNA
- Primary taxonomy
- Certified Registered Nurse Anesthetist 367500000X
- License numbers
- RNA203039 ME
143046 CT
9242790 FL
Self-reported in NPPES; status is on the state search - Practice location
- 10 Wayman LN, Bar Harbor, ME 04609
- Phone
- (207) 288-5081
- Enumerated
- Jul 8, 2011
- Record last updated
- Sep 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20201218000107); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest certified registered nurse anesthetist records → All 534 in Maine → Look up another NPI →
Also registered at 10 Wayman LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Allerding, D.OFamily Medicine Physician1104895747
- Angela Arnold-Ross, RN, MSNFamily Nurse Practitioner1548713191
- Lynne Assaf, MSWClinical Social Worker1740307313
- Katelynn Badger, CRNACertified Registered Nurse Anesthetist1710508478
- Kyla Baxter, OTR/LPhysical Rehabilitation Occupational Therapist1902761331
- Brenda Beckett, P.A.-CMedical Physician Assistant1134214018
Verify William Cash Byer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license RNA203039Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 84 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
2 hospitals and group practices
- Las Cruces HB Medical Services LLCLas Cruces, NM
- Mount Desert Island HospitalBar Harbor, ME · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
William Cash Byer among 534 certified registered nurse anesthetist records in Maine
William Cash Byer, CRNA is one of 534 certified registered nurse anesthetist records with a practice address in Maine. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 48% of them.
- NPI issued2011 · 48% of these records are older, 49% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2011 · median 2014 among the 395 with a school on file
- Record last updated2020 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 367500000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 certified registered nurse anesthetist records list a practice address in Bar Harbor
They are 7 of the 157 NPPES records with a practice address in Bar Harbor, and 534 certified registered nurse anesthetist records in Maine.
All 534 in Maine → Every provider in Bar Harbor → Certified Registered Nurse Anesthetist nationwide →
The 8 certified registered nurse anesthetist records with the nearest ZIP codes
- Katelynn Badger, CRNABar Harbor, ME 046091710508478
- Ralph Erickson, CRNABar Harbor, ME 046091346336633
- Trisha Kiliany, CRNABar Harbor, ME 046091508836685
- Paula Lavigne, CRNABar Harbor, ME 046091073662839
- Christopher Price, CRNABar Harbor, ME 046091588750608
- Rachael SharpBar Harbor, ME 046091265528301
- Enid Cox, CRNAEllsworth, ME 046051568405611
- James Mackey, CRNAEllsworth, ME 046051598068520
Common questions
What is William Cash Byer, CRNA's NPI number?
William Cash Byer, CRNA's National Provider Identifier (NPI) is 1285921403, issued on Jul 8, 2011. An NPI identifies a provider in billing; it is not a license.
Where is William Cash Byer, CRNA located?
The NPPES record lists a practice address at 10 Wayman LN, Bar Harbor, ME, 04609. Phone: (207) 288-5081. Providers update this record themselves, so call before visiting.
How can I verify William Cash Byer, CRNA's license?
NPPES lists Maine license number RNA203039, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
What is William Cash Byer, CRNA's MIPS final score?
The 2023 MIPS final score is 84 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.