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

Mrs. Mary Antos, RN

Adult Psychiatric/Mental Health Registered Nurse in Oak Lawn, IL · enumerated 2009.

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

National Provider Identifier

1811222086

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Registry record

Entity type Individual (Type 1)

Name Mrs. Mary Antos

Credential RN

Sex Female

Practice address Oak Lawn, IL, 60453

Phone (708) 684-4969

Fax (708) 684-1242

Enumeration date Oct 6, 2009

Last updated in NPPES Oct 6, 2009

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

Taxonomy & licenses

163WP0809X Adult Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 209.005136 (IL) Primary

163WP0809X Adult Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 041.241416 (IL) Secondary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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 specialty is Mary Antos?

Mary Antos is registered in NPPES with the primary taxonomy of Adult Psychiatric/Mental Health Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-10-06.