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

Dr. Eric Mitchell Klein, D.M.D., P.C.

General Practice Dentistry in Cambridge, MA · enumerated 2008.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1740430875

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Registry record

Entity type Individual (Type 1)

Name Dr. Eric Mitchell Klein

Credential D.M.D., P.C.

Sex Male

Practice address Cambridge, MA, 02140

Phone (617) 547-9100

Fax (617) 547-2962

Enumeration date Sep 25, 2008

Last updated in NPPES Sep 25, 2008

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 143-61 (MA) Primary

DMD — Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

Other identifiers

Identifier	Type	State	Issuer
1223G0001X	Other	MA	DE CARE

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Eric Klein?

Eric Klein is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-09-25.