Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allen R. Calabresi, MD

Hematology & Oncology Physician in Slidell, LA · enumerated 2006.

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

National Provider Identifier

1043375363

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Registry record

Entity type Individual (Type 1)

Name Allen R. Calabresi

Credential MD

Sex Male

Practice address 1120 Robert Blvd, Suite 200, Slidell, LA, 70458

Phone (985) 646-2411

Fax (985) 646-2413

Enumeration date Dec 27, 2006

Last updated in NPPES Jan 22, 2020

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 17437 (MS) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 022569 (LA) 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
04659300	Medicaid	MS	-
1483401	Medicaid	LA	-

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

Where does Allen Calabresi practice?

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

What is the NPI number for Allen Calabresi?

The National Provider Identifier (NPI) for Allen Calabresi is 1043375363, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Sumathi Smith Hematology & Oncology Physician · Slidell, LA NPI 1932189016 Ronald Leblanc Hematology & Oncology Physician · Slidell, LA NPI 1124183439 Northlake Hematology/Oncology Associates Hematology & Oncology Physician · Slidell, LA NPI 1568527737 Shaun Xiao Hematology & Oncology Physician · Slidell, LA NPI 1063726206 Northshore Oncology Associates, LLC Hematology & Oncology Physician · Slidell, LA NPI 1609165711 Aurash Khoobehi Hematology & Oncology Physician · Slidell, LA NPI 1548535883 Mary Boyte Family Nurse Practitioner · Slidell, LA NPI 1750756367 Ochsner Clinic LLC General Practice Physician · Slidell, LA NPI 1780116772

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-22.