Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William F Hays MD, Ltd

Family Medicine Physician in Herrin, IL · enumerated 2010 · authorized official William Hays, President.

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

National Provider Identifier

1134449275

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Registry record

Entity type Organization (Type 2)

Legal business name William F Hays MD, Ltd

Practice address 3305 Logan Dr, Herrin, IL, 62948

Phone (618) 997-4444

Fax (618) 993-1173

Enumeration date Jun 10, 2010

Last updated in NPPES Mar 22, 2019

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 36-056810 (IL) Primary

Authorized official

Name William Hays

Title President

Phone (618) 997-4444

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2019-03-22. Verify at npiregistry.cms.hhs.gov.

Where is William F Hays MD, Ltd located?

The practice location on file with NPPES is in Herrin, IL.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-03-22.