Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen Carl Klass, MD

Neurology Physician in New Rochelle, NY · enumerated 2006.

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

National Provider Identifier

1518980960

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Carl Klass

Credential MD

Sex Male

Practice address 421 Huguenot St, New Rochelle, NY, 10801

Phone (914) 636-4418

Fax (914) 636-2975

Enumeration date Jul 26, 2006

Last updated in NPPES Jan 26, 2010

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 123891 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Stephen Klass?

The National Provider Identifier (NPI) for Stephen Klass is 1518980960, a Type 1 (individual) record in the CMS NPPES registry.

Where does Stephen Klass practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-26.