What is 21st Century Oncology LLC's NPI number?

21st Century Oncology LLC's National Provider Identifier (NPI) is 1841572559, 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 Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).

Where is 21st Century Oncology LLC located?

21st Century Oncology LLC's practice location on file with NPPES is 1031 Se 9th Pl, Cape Coral, FL 33990-3003.

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) 573-8448.

Who is the authorized official for 21st Century Oncology LLC?

The authorized official listed on 21st Century Oncology LLC's NPPES record is Kim Commins, Ceo. 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 (1841572559) is active in the NPPES registry as of the last update on 2019-07-12.

OrganizationActive

21st Century Oncology LLC

NPI 1841572559 · Pulmonary Disease Physician · Cape Coral, FL

21st Century Oncology LLC is a Pulmonary Disease Physician organization in Cape Coral, FL (NPI 1841572559).

Provider details

NPI number: 1841572559
Entity type: Organization
Primary specialty: Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
Parent organization: Radiation Therapy Services Inc
Organization subpart: Yes
Authorized official: Kim Commins, Ceo(239) 931-7277

Practice location

1031 Se 9th Pl

Unit 2

Cape Coral, FL 33990-3003

Phone: (239) 573-8448

Fax: (239) 573-8604

Street-level locationGet directions

More FL providers

Mailing address

2234 Colonial Blvd

Fort Myers, FL 33907-1412

Specialties & taxonomies

Pulmonary Disease PhysicianPrimary207RP1001X
Allopathic & Osteopathic Physicians
Sleep Medicine (Internal Medicine) Physician207RS0012X
Allopathic & Osteopathic Physicians

Other names (DBA / former)

Doing business as: Howard Eisenberg
Doing business as: Howard Eisenberg

Profile Score

Detailed profile(81/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
15 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.

Enumerated: 2011-09-20
Last updated: 2019-07-12

Frequently asked questions

What is 21st Century Oncology LLC's NPI number?: 21st Century Oncology LLC's National Provider Identifier (NPI) is 1841572559, 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 Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
Where is 21st Century Oncology LLC located?: 21st Century Oncology LLC's practice location on file with NPPES is 1031 Se 9th Pl, Cape Coral, FL 33990-3003.
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) 573-8448.
Who is the authorized official for 21st Century Oncology LLC?: The authorized official listed on 21st Century Oncology LLC's NPPES record is Kim Commins, Ceo. 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 (1841572559) is active in the NPPES registry as of the last update on 2019-07-12.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Other names (DBA / former)

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Other names (DBA / former)

Profile Score

Frequently asked questions