Dr. Casey Ellis Duncan, MD
- Medicare services, 2024
- 14,410
- Medicare patients, 2024
- 365
- Part D claims, 2024
- 372
- MIPS score, 2024
- 100
- Hospital affiliations
- 4
- Practice address
- 210 W McKinley Ave, Decatur, IL 62526
- Practice phone
- Call (217) 876-6600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cancer Care Specialists of Central Illinois, S.C.
Decatur, Illinois
Find Dr. Duncan's professional email, personal email and mobile number
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Dr. Casey Ellis Duncan is a radiation oncologist in Decatur, Illinois
Dr. Duncan practices at Cancer Care Specialists of Central Illinois, S.C. in Decatur, Illinois.
Dr. Duncan's NPI, 1487720942, was assigned on November 28, 2006. Dr. Duncan graduated from Uniformed Services UHS Fe Hebert School of Med in 1997. Dr. Duncan holds Illinois license 036137340.
- NPI
- 1487720942NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820284441
- NPI enumeration date
- November 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (217) 876-6600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Casey Ellis Duncan practices at Cancer Care Specialists of Central Illinois, S.C. in Decatur, Illinois
Dr. Duncan's primary practice is Cancer Care Specialists of Central Illinois, S.C., at 210 W McKinley Ave, Decatur, IL 62526 in Macon County. The practice phone is (217) 876-6600.
- Cancer Care Specialists of Central Illinois, S.C.210 W McKinley Ave, Decatur, IL 62526 · Macon CountyPhone(217) 876-6600
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Casey Ellis Duncan is affiliated with 7 sites of care and 1 medical group
Dr. Duncan's primary practice is Cancer Care Specialists of Central Illinois, S.C. in Decatur, Illinois. Dr. Duncan is also affiliated with HSHS St. Anthony's Memorial Hospital. The medical group on file is Cancer Care Specialists of IL. Dmand AI also links Dr. Duncan to 3 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Casey Ellis Duncan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duncan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cancer Care Specialists of Central Illinois, S.C. | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Casey Ellis Duncan is one of 243 radiation oncologists in Illinois
Radiation oncology is Dr. Duncan's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Duncan is licensed in Illinois.
Specialties and state licenses
- Radiation oncology, IllinoisPrimary
Radiation oncologists near Dr. Duncan
Counts of radiation oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Casey Ellis Duncan billed Medicare for 14,410 services in 2024
CMS data shows 14,410 Medicare services from Dr. Duncan across 42 procedure codes in 2024, for 365 Medicare patients. Medicare paid $1,103,258 for them. Every service was in an office.
Dr. Duncan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 7,5112024: 10,16035%
- Imaging
- 2023: 2,3952024: 2,2546%
- Lab and pathology
- 2023: 8162024: 98521%
- Office and hospital visits
- 2023: 5932024: 5665%
- Surgery
- 2023: 2862024: 3139%
- Drugs given in the office
- 2023: 1352024: 9827%
- Tests and treatments
- 2023: 412024: 3417%
Dr. Duncan compared with the Illinois median for radiation oncologists, 2024
- Dr. Duncan
- Illinois median
- Medicare services
- 14,410vs 1,4599.9 times
- Medicare patients
- 365vs 1762.1 times
- Part D claims
- 270vs 347.9 times
Medians across 231 radiation oncologists in Illinois with Dmand AI profiles that report each measure.
Dr. Duncan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Duncan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duncan and other radiation oncologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Casey Ellis Duncan treated 365 Medicare patients in 2024, average age 76
CMS counts 365 Medicare patients who saw Dr. Duncan in 2024. The largest group is 65 to 74, with 154 patients. 75% of them have cancer, and 75% have high blood pressure. 15% are also on Medicaid. Their average risk score is 1.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Duncan's median patient age at 73, with 32% women.
Dr. Duncan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Duncan's Medicare patients by sex, 2024
- Women9727%
- Men26873%
Chronic conditions among Dr. Duncan's Medicare patients, 2024
- Cancer75%
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes36%
- Ischemic heart disease36%
- COPD32%
- Chronic kidney disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duncan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women32%
- Men68%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Casey Ellis Duncan wrote 372 Medicare Part D claims in 2024
In 2024, Dr. Duncan wrote 372 Medicare Part D claims for 122 patients. 92% of them were for generic drugs. CMS names the drug for 270 of them, across 9 drugs with 11 or more claims each, at $4,862 in total drug cost. In 2023, CMS named 291 claims across 9 drugs.
Dr. Duncan's Part D claims by kind of drug, 2024
- Generic343 claims92%
- Brand-name29 claims8%
Dr. Duncan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Duncan's Part D claims, 2024
- Opioids11%41 of 372 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2912024: 2707%
Drugs named by CMS: 9 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Casey Ellis Duncan scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Duncan for performance year 2024, reported as part of a group. Dr. Duncan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Duncan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Duncan's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Casey Ellis Duncan received $293 in industry payments from 2017 to 2025
CMS Open Payments shows 15 general payments to Dr. Duncan from 11 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Amneal Pharmaceuticals LLC paid the most, $49.
General payments to Dr. Duncan by program year, 2017 to 2025
Companies that paid Dr. Duncan the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Casey Ellis Duncan graduated from Uniformed Services UHS Fe Hebert School of Med
Dr. Duncan graduated from Uniformed Services UHS Fe Hebert School of Med in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Casey Ellis Duncan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Casey Ellis Duncan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Casey Ellis Duncan's NPI number?
Dr. Casey Ellis Duncan's NPI number is 1487720942. It was assigned on November 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Casey Ellis Duncan?
Dr. Casey Ellis Duncan is a radiation oncologist in Decatur, Illinois. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Casey Ellis Duncan practice?
Dr. Duncan practices at 210 W McKinley Ave, Decatur, IL 62526. Dr. Duncan's primary practice is Cancer Care Specialists of Central Illinois, S.C. in Decatur, Illinois. Dmand AI also links Dr. Duncan to 3 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Casey Ellis Duncan's office phone number?
The practice phone on file for Dr. Duncan is (217) 876-6600.
What is Dr. Casey Ellis Duncan's medical license number?
Dr. Duncan holds Illinois license 036137340.
Which hospitals is Dr. Casey Ellis Duncan affiliated with?
Dr. Duncan is affiliated with HSHS St. Anthony's Memorial Hospital. Dmand AI links Dr. Duncan to 3 more hospitals.
What medical group is Dr. Casey Ellis Duncan part of?
Dr. Duncan is linked to Cancer Care Specialists of IL.
Does Dr. Casey Ellis Duncan accept Medicare?
Yes. CMS data shows Dr. Duncan billed Medicare for 14,410 services in 2024, and Dr. Duncan accepts Medicare assignment.
Does Dr. Casey Ellis Duncan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Duncan as offering telehealth services.
What is Dr. Casey Ellis Duncan's MIPS score?
Dr. Duncan's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Casey Ellis Duncan see?
CMS counts 365 Medicare patients who saw Dr. Duncan in 2024, with an average age of 76.
What services does Dr. Casey Ellis Duncan bill to Medicare?
In 2024, Dr. Duncan's most billed Medicare services were medicare temporary code (Q9967), medicare service (G6015) and medicare service (G6011).
Where did Dr. Casey Ellis Duncan go to medical school?
Dr. Duncan graduated from Uniformed Services UHS Fe Hebert School of Med in 1997.
What drugs does Dr. Casey Ellis Duncan prescribe most?
In 2024 Medicare Part D data, Dr. Duncan's most prescribed drugs by claims were Mometasone Furoate, Tamsulosin HCl and Oxybutynin Chloride ER.
Has Dr. Casey Ellis Duncan received payments from drug or device companies?
CMS Open Payments shows $293 in general payments to Dr. Duncan from 11 companies from 2017 to 2025. The largest total came from Amneal Pharmaceuticals LLC.
How long has Dr. Casey Ellis Duncan been practicing?
Dr. Duncan graduated from medical school in 1997, 29 years ago.
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