Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Z. Borer, M.D.

Internal Medicine Physician in Jonesport, ME · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1114935798

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Registry record

Entity type Individual (Type 1)

Name Dr. William Z. Borer

Credential M.D.

Sex Male

Practice address Jonesport, ME, 04649

Phone (207) 497-2606

Fax (207) 497-2606

Enumeration date Aug 3, 2006

Last updated in NPPES Apr 13, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD035776E (PA) Primary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License MD035776E (PA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for William Borer?

The National Provider Identifier (NPI) for William Borer is 1114935798, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Borer practice?

The practice location on file with NPPES is in Jonesport, ME. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-13.