Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Louis Ruggiero, M.D.

Cardiovascular Disease Physician in Waterbury, CT · enumerated 2006.

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

National Provider Identifier

1396773644

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Louis Ruggiero

Credential M.D.

Sex Male

Practice address 455 Chase Pkwy, Waterbury, CT, 06708

Phone (203) 573-1435

Fax (203) 755-7433

Enumeration date Jun 28, 2006

Last updated in NPPES Jul 15, 2014

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 033880 (CT) Primary

207UN0901X Nuclear Cardiology Physician Allopathic & Osteopathic Physicians · License 033880 (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
060062866	Other	CT	RAILROAD MEDICARE
206672	Other	CT	WELLCARE
25-40444	Other	CT	UNITED HEALTHCARE
033880	Other	CT	CONNECTICARE
12-53847	Other	CT	UHC
2975035/5284461	Other	CT	AETNA
5284461	Other	CT	AETNA HEALTH PLANS
P00024935	Other	CT	RR MEDICARE
12-53847	Other	CT	AMERICHOICE
1396773644	Medicaid	CT	-
033880-H429	Other	CT	CONNECTICARE
2V2902	Other	CT	HEALTHNET/COMMERCIAL
874325	Other	CT	USA
001338806	Medicaid	CT	-
010033880CT06	Other	CT	ANTHEM BCBS CT
0V8017	Other	CT	HEALTH NET OF NORTHEAST
NHS225	Other	CT	OXFORD HEALTH PLANS
010033880CT05	Other	CT	ANTHEM BC & BS
01033880	Other	CT	CIGNA HEALTH PLANS
P2743333	Other	CT	OXFORD

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

What specialty is Mark Ruggiero?

Mark Ruggiero is registered in NPPES with the primary taxonomy of Cardiovascular Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-07-15.