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

Jean M Cassmer, RN

Q: What is the NPI number for Jean Cassmer?

The National Provider Identifier (NPI) for Jean Cassmer is 1013249960, a Type 1 (individual) record in the CMS NPPES registry.

Registered Nurse in Stony Brook, NY · enumerated 2010.

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

National Provider Identifier

1013249960

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Jean M Cassmer

Credential RN

Sex Female

Practice address Stony Brook, NY, 11790

Phone (631) 689-8920

Fax (631) 689-2194

Enumeration date Feb 3, 2010

Last updated in NPPES Feb 3, 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 315577 (NY) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Jean Cassmer?

The National Provider Identifier (NPI) for Jean Cassmer is 1013249960, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jean Cassmer practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-03.