Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas R Klein, MD

Otolaryngology Physician in Worcester, MA · enumerated 2006.

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

National Provider Identifier

1710953898

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Registry record

Entity type Individual (Type 1)

Name Thomas R Klein

Credential MD

Sex Male

Practice address 123 Summer St, Suite 300, Worcester, MA, 01608

Phone (508) 368-3103

Fax (508) 368-3104

Enumeration date Feb 27, 2006

Last updated in NPPES Feb 18, 2009

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 277030 (MA) 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
0146978	Medicaid	MA	-
AA5967	Other	-	HARVARD PILGRIM HEALTHCAR
0146978	Other	-	HEALTHY START
0146978	Other	-	WELFARE
1000177	Other	-	EVERCARE
042472266	Other	-	ONE HEALTH PLAN
4246785	Other	-	AETNA US HEALTHCARE
86726	Other	-	FIRST HEALTH
M04221	Other	-	BLUE CARE ELECT
0082033	Other	-	CIGNA HEALTH PLAN
784043	Other	-	MVP HEALTH CARE
042472266	Other	-	HEALTHCARE VALUE MANAGEME
042472266	Other	-	PRIVATE HEALTHCARE SYSTEM
84413	Other	-	CHILDRENS MEDICAL SECURIT
MO4221	Other	-	MEDICARE B
M04221	Other	-	BLUE SHIELD INDEMNITY
28726	Other	-	FALLON COMMUNITY HEALTH P
M04221	Other	-	BLUE SHIELD HMO BLUE

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

How do I verify Thomas Klein's NPI record?

Cross-check NPI 1710953898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1710953898 active?

Yes, as of the latest NPPES snapshot, NPI 1710953898 is active (record last updated 2009-02-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-18.