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Mary Holmes, BSN,RN

Addiction (Substance Use Disorder) Registered Nurse in Alton, IL · enumerated 2022.

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

National Provider Identifier

1922741735

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Registry record

Entity type Individual (Type 1)
Name Mary Holmes
Credential BSN,RN
Sex Female
Practice address 2615 Edwards St, Alton, IL, 62002
Phone (618) 462-2331
Fax (618) 462-2504
Enumeration date Apr 19, 2022
Last updated in NPPES Apr 19, 2022

Taxonomy & licenses

163WA0400X Addiction (Substance Use Disorder) Registered Nurse Nursing Service Providers · License 041.169895 (IL) Primary
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.

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Frequently asked questions

Where does Mary Holmes practice?
The practice location on file with NPPES is in Alton, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Holmes?
The National Provider Identifier (NPI) for Mary Holmes is 1922741735, 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 2022-04-19.