Cook Radiation Oncology Sc
NPI 1689953838 · Radiation Oncology Physician · Chicago, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cook Radiation Oncology Sc is a Radiation Oncology Physician organization in Chicago, IL (NPI 1689953838).
Provider details
- NPI number
- 1689953838
- Entity type
- Organization
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Harish Thakrar, Owner(312) 864-3838
- License
- 036046368 (IL)
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
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 7435 W Talcott AveChicago, IL 60631-3707Phone: (312) 864-3838Fax: (312) 864-9295
Registry dates
- Enumerated
- 2011-08-05
- Last updated
- 2020-09-24
- Certified
- 2020-09-23
Frequently asked questions
- What is Cook Radiation Oncology Sc's NPI number?
- Cook Radiation Oncology Sc's National Provider Identifier (NPI) is 1689953838, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Cook Radiation Oncology Sc?
- Cook Radiation Oncology Sc is classified in the NPPES registry as Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Cook Radiation Oncology Sc located?
- Cook Radiation Oncology Sc's practice location on file with NPPES is 2233 W. Division Street, Chicago, IL 60622.
- What is Cook Radiation Oncology Sc's phone number?
- The practice phone number listed in the NPPES registry for Cook Radiation Oncology Sc is (312) 864-3838.
- Does Cook Radiation Oncology Sc accept Medicare?
- Cook Radiation Oncology Sc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Cook Radiation Oncology Sc?
- The authorized official listed on Cook Radiation Oncology Sc's NPPES record is Harish Thakrar, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Cook Radiation Oncology Sc's NPI active?
- Yes — Cook Radiation Oncology Sc's NPI (1689953838) is active in the NPPES registry as of the last update on 2020-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.