Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Fitzgerald Demas, M.D., F.A.C.R.

Radiation Oncology Physician in Akron, OH · enumerated 2005.

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

National Provider Identifier

1033100334

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Registry record

Entity type Individual (Type 1)

Name William Fitzgerald Demas

Credential M.D., F.A.C.R.

Sex Male

Practice address 525 E Market St, Akron, OH, 44304

Phone (330) 375-3557

Fax (337) 376-1302

Enumeration date Nov 4, 2005

Last updated in NPPES Dec 2, 2025

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 35-054294 (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
0636879	Medicaid	OH	-

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.

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Frequently asked questions

How do I verify William Demas's NPI record?

Cross-check NPI 1033100334 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1033100334 active?

Yes, as of the latest NPPES snapshot, NPI 1033100334 is active (record last updated 2025-12-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-02.