NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Francis John Sullivan, M.D.

Radiation Oncology Physician in Hornell, NY · enumerated 2006 · practices at Bruce W Mackellar MD PC.

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

National Provider Identifier

1972535599

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Registry record

Entity type Individual (Type 1)
Name Francis John Sullivan
Credential M.D.
Sex Male
Practice address 111 Loder St, Suite B, Hornell, NY, 14843
Phone (607) 324-2340
Fax (607) 324-1697
Enumeration date Jul 6, 2006
Last updated in NPPES Nov 1, 2013

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License D0037347 (MD) Primary
2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD32909 (DC) Secondary
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
637126008 Other MD CIGNA
011444700 Medicaid DC -
925345 Other MD AETNA HMO
5931012 Other MD AETNA PPO/POS
227987 Other MD MAMSI
241665 Other MD PHCS
525161300 Medicaid MD -
603327-02 Other MD CAREFIRST BC/BS
5473912 Other MD FIRST HEALTH/CCN
103688 Other MD KAISER PERMANENTE
29020001 Other DC CAREFIRST BC/BS
498267 Other DC NATIONAL CAPITOL PPO
58607 Other MD AMERIGROUP
176627907 Other MD UNITED HC/AMERICHOICE
3449 Other MD JOHNS HOPKINS HEALTHCARE

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

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 Francis Sullivan?
Francis Sullivan is registered in NPPES with the primary taxonomy of Radiation Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-01.