Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Margaret L. J. Hayes, M.D.

Psychiatry Physician in Marion, IL · enumerated 2007 · practices at Shawnee Health Service and Development Corp.

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

National Provider Identifier

1578619003

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Registry record

Entity type Individual (Type 1)

Name Dr. Margaret L. J. Hayes

Credential M.D.

Sex Female

Practice address 3111 Williamson County Parkway, Marion, IL, 62959

Phone (618) 997-3647

Fax (618) 998-1328

Enumeration date Jan 26, 2007

Last updated in NPPES Jan 11, 2010

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 036-090222 (IL) 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
CF3444	Other	IL	MEDICARE RAILROAD GROUP
036090222	Medicaid	IL	-
370966854011	Medicaid	IL	-

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 Margaret Hayes practice?

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

What is the NPI number for Margaret Hayes?

The National Provider Identifier (NPI) for Margaret Hayes is 1578619003, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Amanda Martin Occupational Therapy Assistant · Marion, IL NPI 1518055763 Shawnee Health Service and Development Corp Federally Qualified Health Center (FQHC) · Marion, IL NPI 1649405150

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-11.