Corey Christian Foster, M.D.
Radiation Oncology Physician · Chicago, IL
Corey Christian Foster, M.D. is a radiation oncology physician with a practice address in Chicago, Illinois, and NPI 1063806990, issued on Mar 28, 2015. Check the license (Illinois 125067927, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Corey Christian Foster
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 125067927 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave, Chicago, IL 60637
- Phone
- (570) 573-2793
- Enumerated
- Mar 28, 2015
- Record last updated
- Jan 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20210623002493); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2015
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 277 in Illinois → Look up another NPI →
Also registered at 5841 S Maryland Ave
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Verify Corey Christian Foster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 125067927Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average radiation oncology physician in 2024
140 Medicare Part D claims for 52 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims. 11 claims were for opioids.
Most prescribed
- Ssd24 claims
- Gabapentin15 claims
- Fluconazole14 claims
- Lidocaine Hcl Viscous13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $176.32
7 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Affiliated Oncologists LLCHazel Crest, IL
- Specialty Physicians OF Illinois LLCOlympia Fields, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Corey Christian Foster among 277 radiation oncology physician records in Illinois
Corey Christian Foster, M.D. is one of 277 radiation oncology physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 77% of them.
- NPI issued2015 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2015 · median 2004 among the 184 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Illinois
There are 277 radiation oncology physician records in Illinois.
All 277 in Illinois → Every provider in Chicago → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Azhar AwanChicago, IL 606371497829725
- Steven ChmuraChicago, IL 606371629137161
- Philip ConnellChicago, IL 606371538228077
- Howard HalpernChicago, IL 606371447319983
- Daniel HarafChicago, IL 606371356400899
- Yasmin HasanChicago, IL 606371194939744
- Andrew HowardChicago, IL 606371942252432
- Matthew Koshy, MDChicago, IL 606371568506103
Common questions
What is Corey Christian Foster, M.D.'s NPI number?
Corey Christian Foster, M.D.'s National Provider Identifier (NPI) is 1063806990, issued on Mar 28, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Corey Christian Foster, M.D. located?
The NPPES record lists a practice address at 5841 S Maryland Ave, Chicago, IL, 60637. Phone: (570) 573-2793. Providers update this record themselves, so call before visiting.
How can I verify Corey Christian Foster, M.D.'s license?
NPPES lists Illinois license number 125067927, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Corey Christian Foster, M.D. prescribe under Medicare Part D?
In 2024, Corey Christian Foster, M.D. had 140 Medicare Part D claims for 52 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.