Illinois Oncology Ltd
NPI 1659568764 · Hematology & Oncology Physician · Swansea, IL
Illinois Oncology Ltd is a Hematology & Oncology Physician organization in Swansea, IL (NPI 1659568764).
Provider details
- NPI number
- 1659568764
- Entity type
- Organization
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Popovic, President(618) 288-6800
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
- 2007-10-02
- Last updated
- 2009-02-03
Frequently asked questions
- What is Illinois Oncology Ltd's NPI number?
- Illinois Oncology Ltd's National Provider Identifier (NPI) is 1659568764, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Illinois Oncology Ltd?
- Illinois Oncology Ltd is classified in the NPPES registry as Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Illinois Oncology Ltd located?
- Illinois Oncology Ltd's practice location on file with NPPES is 4000 North Illinois Lane, Swansea, IL 62226.
- What is Illinois Oncology Ltd's phone number?
- The practice phone number listed in the NPPES registry for Illinois Oncology Ltd is (618) 233-8000.
- Who is the authorized official for Illinois Oncology Ltd?
- The authorized official listed on Illinois Oncology Ltd's NPPES record is William Popovic, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Illinois Oncology Ltd's NPI active?
- Yes — Illinois Oncology Ltd's NPI (1659568764) is active in the NPPES registry as of the last update on 2009-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.