Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Paul Cortellessa, DMD

General Practice Dentistry in Reading, PA · enumerated 2007 · practices at Korcort Enterprises, Inc..

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

National Provider Identifier

1235356742

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Paul Cortellessa

Credential DMD

Sex Male

Practice address 1270 Shelbourne Rd, Reading, PA, 19606

Phone (610) 779-0610

Fax (610) 779-9252

Enumeration date Apr 19, 2007

Last updated in NPPES Sep 12, 2008

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License DS-026922-L (PA) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

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

How do I verify Gregory Cortellessa's NPI record?

Cross-check NPI 1235356742 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235356742 active?

Yes, as of the latest NPPES snapshot, NPI 1235356742 is active (record last updated 2008-09-12).

Other providers at this practice address

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Korcort Enterprises, Inc. General Practice Dentistry · Reading, PA NPI 1982850822 Rosmery Aguilera Olea Dental Hygienist · Reading, PA NPI 1679429070

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-12.