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John M Dalena and Darren R Blumberg MD LLC

Gastroenterology Physician in Cedar Knolls, NJ · enumerated 2007 · authorized official Elsie Duque, Office Administrator.

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

National Provider Identifier

1033255096

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Registry record

Entity type Organization (Type 2)
Legal business name John M Dalena and Darren R Blumberg MD LLC
Practice address 65 Ridgedale Ave, Cedar Knolls, NJ, 07927
Phone (973) 401-0500
Fax (973) 401-9306
Enumeration date Jan 29, 2007
Last updated in NPPES Jun 11, 2013

Taxonomy & classification

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Elsie Duque
Title Office Administrator
Phone (973) 401-0500

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 John M Dalena and Darren R Blumberg MD LLC?
The NPI for John M Dalena and Darren R Blumberg MD LLC is 1033255096, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for John M Dalena and Darren R Blumberg MD LLC?
NPPES lists Elsie Duque (Office Administrator) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-11.