Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Connecticut Oncology & Hematology LLP

Clinical Medical Laboratory in Torrington, CT · enumerated 2008 · authorized official Ivan Lowenthal, Physician.

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

National Provider Identifier

1619140829

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Registry record

Entity type Organization (Type 2)

Legal business name Connecticut Oncology & Hematology LLP

Practice address 200 Kennedy Dr, Torrington, CT, 06790

Phone (860) 482-5384

Fax (860) 496-5072

Enumeration date Apr 9, 2008

Last updated in NPPES Jun 30, 2008

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories · License 07D0100617 (CT) Primary

Authorized official

Name Ivan Lowenthal

Title Physician

Phone (860) 482-5384

Other identifiers

Identifier	Type	State	Issuer
004118528	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Connecticut Oncology & Hematology LLP?

Connecticut Oncology & Hematology LLP is registered in NPPES as a Clinical Medical Laboratory (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-30.