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

Mrs. Mary Ann Klein, RN, FA

Q: What is the NPI number for Mary Klein?

The National Provider Identifier (NPI) for Mary Klein is 1043364714, a Type 1 (individual) record in the CMS NPPES registry.

Registered Nurse in Waterloo, IL · enumerated 2007.

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

National Provider Identifier

1043364714

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Registry record

Entity type Individual (Type 1)

Name Mrs. Mary Ann Klein

Credential RN, FA

Sex Female

Practice address Waterloo, IL, 62298

Phone (618) 978-4614

Fax (315) 473-3738

Enumeration date Jan 22, 2007

Last updated in NPPES Jul 21, 2010

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 2000152451 (IL) Primary

246ZS0410X Surgical Technologist Technologists, Technicians & Other Technical Service Providers 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 is the NPI number for Mary Klein?

The National Provider Identifier (NPI) for Mary Klein is 1043364714, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Klein practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-21.