Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Emmanuel Karellas, M.D.

Urology Physician in New Haven, CT · enumerated 2007.

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

National Provider Identifier

1376671396

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Emmanuel Karellas

Credential M.D.

Sex Male

Practice address 800 Howard Ave, New Haven, CT, 06519

Phone (203) 737-6959

Fax (203) 785-4043

Enumeration date Mar 1, 2007

Last updated in NPPES Jun 12, 2023

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 60 241182 (NY) Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 25MA08557100 (NJ) Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 055043 (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
0199770	Medicaid	NJ	-
P00944510	Other	NJ	RR MCR PTAN

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 is the NPI number for Michael Karellas?

The National Provider Identifier (NPI) for Michael Karellas is 1376671396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Karellas practice?

The practice location on file with NPPES is in New Haven, CT. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-12.