Quick answers
- Does John Felker accept Medicare assignment?
- Yes. Medicare's clinician data says John Felker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John Felker see?
- In 2024, CMS data shows 2,164 Original Medicare patients and 21,533 services for John Felker. This counts Original Medicare only and measures volume, not quality.
- What is John Felker's NPI number?
- 1679514996. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John Felker, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 2,164 |
|---|---|
| Services billed to Medicare | 21,533 |
| Different services or procedures | 95 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)18,000 services
- Screening mammography (77067)665 services
- Screening 3d breast mammography (77063)664 services
- Dxa bone density measurement of hip, pelvis, spine (77080)509 services
- Ct scan of chest without contrast (71250)217 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure69%
- Arthritis46%
- Diabetes24%
- Depression23%
- Ischemic heart disease22%
Practice locations
Addresses where John Felker is enrolled with Medicare (CMS data updated October 2, 2026).
- 211 N Eddy StSouth Bend, IN 46617 (574) 234‑8161
- 301 E Day RdMishawaka, IN 46545 (574) 204‑6700
- 430 Pennsylvania AveGlen Ellyn, IL 60137 (630) 469‑9200
Group practices
Medicare enrollment lists John Felker as a member of these groups (CMS data updated October 2, 2026).
- Dupage Medical Group Ltd1,322 clinicians in the group
- The South Bend Clinic LLC175 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in South Bend
Clinicians with the same Medicare primary specialty in South Bend, IN — not a recommendation.
Other clinicians in Dupage Medical Group Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kentucky College Of Medicine |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679514996 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians