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21st Century Oncology LLC

Q: What type of organization is 21st Century Oncology LLC?

21st Century Oncology LLC is registered in NPPES as a Urology Physician (its primary provider taxonomy).

Urology Physician in Crestview, FL · enumerated 2010 · authorized official Dianna Harrison, Sr. Director of Provider Relations.

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

National Provider Identifier

1346561289

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Registry record

Entity type Organization (Type 2)

Legal business name 21st Century Oncology LLC

Other name <Unavail>

Parent organization Radiation Therapy Services Inc

Practice address 131 E Redstone Ave, Suite 102, Crestview, FL, 32539

Phone (850) 682-6333

Fax (850) 682-0865

Enumeration date Jun 15, 2010

Last updated in NPPES Feb 3, 2025

Taxonomy & classification

208D00000X General Practice Physician Allopathic & Osteopathic Physicians Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Dianna Harrison

Title Sr. Director of Provider Relations

Phone (239) 931-7342

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

What type of organization is 21st Century Oncology LLC?

21st Century Oncology LLC is registered in NPPES as a Urology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-03.