Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Brian John Deegan, MD

Radiation Oncology Physician in Fleming Island, FL · enumerated 2013 · practices at Cancer Specialists, LLC.

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

National Provider Identifier

1639513757

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Registry record

Entity type Individual (Type 1)

Name Dr. Brian John Deegan

Credential MD

Sex Male

Practice address 2370 Market Dr, Fleming Island, FL, 32003

Phone (904) 264-6201

Fax (904) 264-6858

Enumeration date Apr 19, 2013

Last updated in NPPES Oct 29, 2018

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License ME135085 (FL) 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
H6U17	Other	FL	FL BLUE
JK033Z	Other	FL	MEDICARE
P02093071	Other	FL	RR MEDICARE
024277400	Medicaid	FL	-

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 NPI 1639513757 active?

Yes, as of the latest NPPES snapshot, NPI 1639513757 is active (record last updated 2018-10-29).

How do I verify Brian Deegan's NPI record?

Cross-check NPI 1639513757 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Mehdi Moezi Hematology & Oncology Physician · Fleming Island, FL NPI 1053316190 Christine Bang Radiation Oncology Physician · Fleming Island, FL NPI 1699824946 Satish Shanbhag Hematology & Oncology Physician · Fleming Island, FL NPI 1215140454 Hema Vankayala Hematology & Oncology Physician · Fleming Island, FL NPI 1023227691 Aria Gibbons Physician Assistant · Fleming Island, FL NPI 1902114408 Stacie Anderson Clinical Social Worker · Fleming Island, FL NPI 1386167229 Cancer Specialists, LLC Hematology & Oncology Physician · Fleming Island, FL NPI 1356912927

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-29.