Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John F Tiernan, M.D.

Anesthesiology Physician in East Hartford, CT · enumerated 2005.

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

National Provider Identifier

1124027701

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Registry record

Entity type Individual (Type 1)

Name John F Tiernan

Credential M.D.

Sex Male

Practice address 111 Founders Plz, #300 C/O Ipms, East Hartford, CT, 06108

Phone (860) 282-4022

Fax (860) 282-0170

Enumeration date Jul 18, 2005

Last updated in NPPES Feb 29, 2008

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 03174 (CT) Primary

207LC0200X Critical Care Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 034174 (CT) Secondary

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
001341742	Medicaid	CT	-

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 John Tiernan?

John Tiernan is registered in NPPES with the primary taxonomy of Anesthesiology Physician. 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 2026-07-13. Provider record last updated 2008-02-29.