NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Arthur S Klein, M.D.

Infectious Disease Physician in East Setauket, NY · enumerated 2006 · practices at Eastern Infectious Disease Associates, P.C..

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

National Provider Identifier

1720193204

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Arthur S Klein
Credential M.D.
Sex Male
Practice address 14 Technology Dr, Suite 10, East Setauket, NY, 11733
Phone (631) 689-5400
Fax (631) 689-8247
Enumeration date Aug 21, 2006
Last updated in NPPES Mar 28, 2013

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 162611 (NY) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
162611 Other NY LICENSE
01159200 Medicaid NY -

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 Arthur Klein?
The National Provider Identifier (NPI) for Arthur Klein is 1720193204, a Type 1 (individual) record in the CMS NPPES registry.
Where does Arthur Klein practice?
The practice location on file with NPPES is in East Setauket, 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 2013-03-28.