Dr. John Gilbert Felker, MD
- Medicare services, 2024
- 21,265
- Medicare patients, 2024
- 2,164
- Industry payments
- $445
- Affiliated sites
- 3
- Medical groups
- 3
- Practice address
- 430-54 Pennsylvania Ave, Glen Ellyn, IL 60137
- Practice phone
- Call (630) 469-9200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Duly Health and Care
Glen Ellyn, Illinois
Find Dr. Felker's professional email, personal email and mobile number
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Dr. John Gilbert Felker is a diagnostic radiologist in Glen Ellyn, Illinois
Dr. Felker practices at Duly Health and Care in Glen Ellyn, Illinois.
Dr. Felker's NPI, 1679514996, was assigned on June 9, 2006. Dr. Felker graduated from University of Kentucky College of Medicine in 1990. Dr. Felker holds Illinois license 036098949.
- NPI
- 1679514996NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931163052
- NPI enumeration date
- June 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (630) 469-9200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Gilbert Felker practices at Duly Health and Care in Glen Ellyn, Illinois
Dr. Felker's primary practice is Duly Health and Care, at 430-54 Pennsylvania Ave, Glen Ellyn, IL 60137 in Dupage County. The practice phone is (630) 469-9200.
- Duly Health and Care430-54 Pennsylvania Ave, Glen Ellyn, IL 60137 · Dupage CountyPhone(630) 469-9200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Gilbert Felker is affiliated with 4 sites of care and 3 medical groups
Dr. Felker's primary practice is Duly Health and Care in Glen Ellyn, Illinois. The medical group on file is DuPage Medical Group. Dmand AI also links Dr. Felker to 2 more group practices and clinics, 2 medical groups and 1 therapy and rehab clinic, 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. John Gilbert Felker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Felker practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Duly Health and Care | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Gilbert Felker is one of 1,336 diagnostic radiologists in Illinois
Diagnostic radiology is Dr. Felker's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Felker is licensed in Illinois.
Specialties and state licenses
- Diagnostic radiology, IllinoisPrimary
Diagnostic radiologists near Dr. Felker
Counts of diagnostic radiologists 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. John Gilbert Felker billed Medicare for 21,265 services in 2024
CMS data shows 21,265 Medicare services from Dr. Felker across 25 procedure codes in 2024, for 2,164 Medicare patients. Medicare paid $252,218 for them. Every service was in an office.
Dr. Felker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 15,9042024: 18,12114%
- Imaging
- 2023: 3,3252024: 3,1445%
- Tests and treatments
- 2023: 112024: 0100%
- Surgery
- 2023: 342024: 0100%
Dr. Felker compared with the Illinois median for diagnostic radiologists, 2024
- Dr. Felker
- Illinois median
- Medicare services
- 21,265vs 2,5758.3 times
- Medicare patients
- 2,164vs 1,83618% above
Medians across 1,261 diagnostic radiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Felker'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. Felker?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Felker and other diagnostic radiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Gilbert Felker treated 2,164 Medicare patients in 2024, average age 74
CMS counts 2,164 Medicare patients who saw Dr. Felker in 2024. The largest group is 65 to 74, with 1,185 patients. 75% of them have high cholesterol, and 69% have high blood pressure. 5% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Felker's median patient age at 72, with 63% women.
Dr. Felker's Medicare patients by age, 2024
Dr. Felker's Medicare patients by sex, 2024
- Women1,68378%
- Men48122%
Chronic conditions among Dr. Felker's Medicare patients, 2024
- High cholesterol75%
- High blood pressure69%
- Arthritis46%
- Mood disorders25%
- Diabetes24%
- Depression23%
- Ischemic heart disease22%
- Chronic kidney disease21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Felker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women63%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. John Gilbert Felker takes part in Medicare
Dr. Felker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Gilbert Felker received $445 in industry payments from 2017 to 2024
CMS Open Payments shows 10 general payments to Dr. Felker from 5 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $182.
General payments to Dr. Felker by program year, 2017 to 2024
Companies that paid Dr. Felker the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Gilbert Felker graduated from University of Kentucky College of Medicine
Dr. Felker graduated from University of Kentucky College of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Gilbert Felker'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. John Gilbert Felker
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What is Dr. John Gilbert Felker's NPI number?
Dr. John Gilbert Felker's NPI number is 1679514996. It was assigned on June 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Gilbert Felker?
Dr. John Gilbert Felker is a diagnostic radiologist in Glen Ellyn, Illinois. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. John Gilbert Felker practice?
Dr. Felker practices at 430-54 Pennsylvania Ave, Glen Ellyn, IL 60137. Dr. Felker's primary practice is Duly Health and Care in Glen Ellyn, Illinois. Dmand AI also links Dr. Felker to 2 group practices and clinics, 2 medical groups and 1 therapy and rehab clinic.
What is Dr. John Gilbert Felker's office phone number?
The practice phone on file for Dr. Felker is (630) 469-9200.
What is Dr. John Gilbert Felker's medical license number?
Dr. Felker holds Illinois license 036098949.
What medical group is Dr. John Gilbert Felker part of?
Dr. Felker is linked to DuPage Medical Group. Dmand AI links Dr. Felker to 2 more medical groups.
Does Dr. John Gilbert Felker accept Medicare?
Yes. CMS data shows Dr. Felker billed Medicare for 21,265 services in 2024, and Dr. Felker accepts Medicare assignment.
How many Medicare patients does Dr. John Gilbert Felker see?
CMS counts 2,164 Medicare patients who saw Dr. Felker in 2024, with an average age of 74.
What services does Dr. John Gilbert Felker bill to Medicare?
In 2024, Dr. Felker's most billed Medicare services were medicare temporary code (Q9967), radiation oncology (77067) and radiation oncology (77063).
Where did Dr. John Gilbert Felker go to medical school?
Dr. Felker graduated from University of Kentucky College of Medicine in 1990.
Has Dr. John Gilbert Felker received payments from drug or device companies?
CMS Open Payments shows $445 in general payments to Dr. Felker from 5 companies from 2017 to 2024. The largest total came from Stryker Corporation.
How long has Dr. John Gilbert Felker been practicing?
Dr. Felker graduated from medical school in 1990, 36 years ago.
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