Radiation Oncology of Northern Illinois LLC
NPI 1598938755 · Radiation Oncology Physician · Ottawa, IL
Radiation Oncology of Northern Illinois LLC is a Radiation Oncology Physician organization in Ottawa, IL (NPI 1598938755).
Provider details
- NPI number
- 1598938755
- Entity type
- Organization
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Robert Chaffin, Member(815) 433-3100
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
Mailing address
Registry dates
- Enumerated
- 2008-04-09
- Last updated
- 2008-04-09
Frequently asked questions
- What is Radiation Oncology of Northern Illinois LLC's NPI number?
- Radiation Oncology of Northern Illinois LLC's National Provider Identifier (NPI) is 1598938755, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Radiation Oncology of Northern Illinois LLC?
- Radiation Oncology of Northern Illinois LLC is classified in the NPPES registry as Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Radiation Oncology of Northern Illinois LLC located?
- Radiation Oncology of Northern Illinois LLC's practice location on file with NPPES is 1200 Starfire Dr, Ottawa, IL 61350.
- What is Radiation Oncology of Northern Illinois LLC's phone number?
- The practice phone number listed in the NPPES registry for Radiation Oncology of Northern Illinois LLC is (815) 431-5458.
- Who is the authorized official for Radiation Oncology of Northern Illinois LLC?
- The authorized official listed on Radiation Oncology of Northern Illinois LLC's NPPES record is Robert Chaffin, Member. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Radiation Oncology of Northern Illinois LLC's NPI active?
- Yes — Radiation Oncology of Northern Illinois LLC's NPI (1598938755) is active in the NPPES registry as of the last update on 2008-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.