OrganizationActive
21st Century Oncology LLC
NPI 1821228685 · Urology Physician · Naples, FL
21st Century Oncology LLC is a Urology Physician organization in Naples, FL (NPI 1821228685).
Provider details
- NPI number
- 1821228685
- Entity type
- Organization
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Parent organization
- Radiation Therapy Services Inc
- Organization subpart
- Yes
- Authorized official
- Daniel Dosoretz, Ceo/President(239) 931-7277
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(85/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
733 4th Ave N
Naples, FL 34102-5731
Phone: (239) 436-5520
Fax: (239) 436-6397
Street-level locationGet directions
Mailing address
2234 Colonial Blvd
Fort Myers, FL 33907-1412
Other names (DBA / former)
- Doing business as
- Advanced Urology & Robotic Surgery
Registry dates
- Enumerated
- 2009-07-15
- Last updated
- 2011-02-02
Frequently asked questions
- What is 21st Century Oncology LLC's NPI number?
- 21st Century Oncology LLC's National Provider Identifier (NPI) is 1821228685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is 21st Century Oncology LLC?
- 21st Century Oncology LLC is classified in the NPPES registry as Urology Physician (Allopathic & Osteopathic Physicians).
- Where is 21st Century Oncology LLC located?
- 21st Century Oncology LLC's practice location on file with NPPES is 733 4th Ave N, Naples, FL 34102-5731.
- What is 21st Century Oncology LLC's phone number?
- The practice phone number listed in the NPPES registry for 21st Century Oncology LLC is (239) 436-5520.
- Who is the authorized official for 21st Century Oncology LLC?
- The authorized official listed on 21st Century Oncology LLC's NPPES record is Daniel Dosoretz, Ceo/President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is 21st Century Oncology LLC's NPI active?
- Yes — 21st Century Oncology LLC's NPI (1821228685) is active in the NPPES registry as of the last update on 2011-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.