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

Michael E Blefeld, M.D.

Pediatrics Physician in Groton, CT · enumerated 2006.

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

National Provider Identifier

1104997923

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Registry record

Entity type Individual (Type 1)

Name Michael E Blefeld

Credential M.D.

Sex Male

Practice address Groton, CT, 06340

Phone (860) 449-8882

Fax (860) 449-9195

Enumeration date Nov 13, 2006

Last updated in NPPES Dec 29, 2008

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

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 22070 (CT) 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
031502	Other	-	HEALTH NET
1416771-005	Other	-	CIGNA
010022070CT01	Other	-	BLUE CROSS BLUE SHIELD
4205040	Other	-	AETNA
620293	Other	-	CONNECTICARE
001220706	Medicaid	CT	-
NLP064	Other	-	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

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 Michael Blefeld?

Michael Blefeld is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Dante Gulino Oral and Maxillofacial Surgery (Dentist) · Groton, CT NPI 1356366165 Steven Carlow Orthopaedic Surgery Physician · Groton, CT NPI 1013935592 Center for Physical Therapy & Sports Rehab Physical Therapist · Groton, CT NPI 1538250642 Carol Fiftal Pediatrics Physician · Groton, CT NPI 1548331374 Anna-Marie Melchreit Pediatrics Physician · Groton, CT NPI 1225109051 Judith Blackman-Cockran Pediatric Nurse Practitioner · Groton, CT NPI 1548331390 Mary Glenn Pediatrics Physician · Groton, CT NPI 1790845949 James Wollschlager General Practice Dentistry · Groton, CT NPI 1568508042

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-12-29.