Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nicholas J. Day, MD

Gastroenterology Physician in Clifton Springs, NY · enumerated 2010.

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

National Provider Identifier

1376862227

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Registry record

Entity type Individual (Type 1)

Name Nicholas J. Day

Credential MD

Sex Male

Practice address 2 Coulter Rd Ste 1740, Clifton Springs, NY, 14432

Phone (315) 462-9478

Fax (315) 462-6707

Enumeration date May 18, 2010

Last updated in NPPES Sep 12, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 4301096131 (MI) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 283388 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Nicholas Day?

Nicholas Day is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-09-12.