Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Britt H. Tonnessen, MD

Vascular Surgery Physician in New Haven, CT · enumerated 2006.

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

National Provider Identifier

1073567772

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Registry record

Entity type Individual (Type 1)

Name Dr. Britt H. Tonnessen

Credential MD

Sex Female

Practice address 330 Cedar Street, Boardman 204, New Haven, CT, 06520

Phone (203) 785-6258

Fax (203) 785-7556

Enumeration date May 19, 2006

Last updated in NPPES Jan 23, 2019

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License TL32882 (SC) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 32882 (SC) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 62276 (CT) Primary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 282289 (NY) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License MD.025529 (LA) 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
328826	Medicaid	SC	-
P00883534	Other	SC	RR MEDICARE ID RSFP

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

How do I verify Britt Tonnessen's NPI record?

Cross-check NPI 1073567772 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1073567772 active?

Yes, as of the latest NPPES snapshot, NPI 1073567772 is active (record last updated 2019-01-23).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-23.