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

William Bailer, M.D.

Surgery Physician in Martins Ferry, OH · enumerated 2005.

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

National Provider Identifier

1427045285

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Registry record

Entity type Individual (Type 1)

Name William Bailer

Credential M.D.

Sex Male

Practice address Martins Ferry, OH, 43935

Phone (740) 633-6504

Fax (740) 635-6514

Enumeration date Oct 5, 2005

Last updated in NPPES Jul 30, 2019

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

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 18596 (WV) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 35070121B (OH) Primary

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

Other identifiers

Identifier	Type	State	Issuer
0274644	Medicaid	OH	-
0126514000	Medicaid	WV	-

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

Where does William Bailer practice?

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

What is the NPI number for William Bailer?

The National Provider Identifier (NPI) for William Bailer is 1427045285, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-30.