JOHN HENNESSY MD NPI 1780676676

NPI Information

  • NPI: 1780676676
  • Provider Name: JOHN HENNESSY, MD
  • Classification: Internal Medicine - 207RE0101X
  • Specialization: Endocrinology, Diabetes & Metabolism
  • Entity Type: Individual
  • Address: 535 MAIN ST
    OLEAN, NY
    ZIP 14760
  • Phone: (716) 372-0141

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NPI Details

John Hennessy, MD is an endocrinology and diabetes and metabolism internal medicine in Olean, NY. The provider is an internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems. John Hennessy, MD NPI is 1780676676. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

The provider's business location address is:

535 MAIN ST
OLEAN, NY
ZIP 14760-513
Phone: (716) 372-0141
Fax: (716) 373-6632

The enumeration date for this NPI number is 8/17/2005 and was last updated on 7/8/2007.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
1207RE0101XInternal MedicineEndocrinology, Diabetes & Metabolism179364NEW YORKYes

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No. Other Provider Identifier Other Provider Identifier Type Other Provider Identifier State Other Provider Identifier Issuer
1C84457MEDICARE UPINNEW YORK
2J33742MEDICARE ID-TYPE UNSPECIFIEDNEW YORK
301139495MEDICAIDNEW YORK

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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