1. Home
  2. Directory
  3. Illinois
  4. Geneva
  5. Internal Medicine
  6. NPI Profile

DR. JOHN A KEFER M.D.
NPI 1477549103
Internal Medicine - Cardiovascular Disease in Geneva, IL

Active since September 27, 2005PECOS Enrolled
351 DELNOR DR, GENEVA, IL 60134(630) 232-0280(630) 232-3895 Get Directions Write a Review

NPPES record last updated: January 31, 2018. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. John A Kefer M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN A KEFER M.D. (NPI 1477549103) is an individual cardiovascular disease provider in Geneva, Illinois, licensed in Illinois (036050847) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1477549103
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDR. JOHN A KEFERCredential: M.D.
Location Address351 DELNOR DRGeneva, IL 60134-4220
Mailing Address351 Delnor DrGeneva, IL 60134-4220 · (630) 232-0280 · Fax (630) 232-3895
Phone(630) 232-0280
Fax(630) 232-3895
Sole ProprietorNo
Enumeration DateSeptember 27, 2005
Last NPPES UpdateJanuary 31, 2018
✔ NPI 1477549103 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in IL · 036050847
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
351 DELNOR DR, Geneva, IL 60134
Open in Google Maps ↗

Other Identifiers 3

Other206147IL · Medicare Ptan (group)
Medicaid036050847IL
Other206147052IL · Medicare Ptan (individual)

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. John A Kefer M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show John Kefer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Delnor Community Hospital
0.2 mi
General Acute Care Hospital
300 RANDALL RD
Geneva, IL 60134
  • Reassigned Medicare billing, Illinois enrollment
  • 35 clinicians in this Medicare group
NPI 1407859655 (630) 208-3000
Central Dupage Hospital Association
9.6 mi
General Acute Care Hospital
25 NORTH WINFIELD RD.
Winfield, IL 60190
  • Reassigned Medicare billing, Illinois enrollment
  • 129 clinicians in this Medicare group
NPI 1003864810 (630) 933-1600
Central Dupage Physician Group
14 mi
Family Medicine
5777 DEPARTMENT
Carol Stream, IL 60122
  • Reassigned Medicare billing, Illinois enrollment
  • 1,664 clinicians in this Medicare group
NPI 1033149844 (630) 933-3300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60134 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MIRIAM HAUTH RN
Registered Nurse
351 DELNOR DR
GENEVA, IL 60134
Kane County (630) 938-8767
DR. NAUMAN MUSHTAQ M.D.
Internal Medicine (Interventional Cardiology)
351 DELNOR DR
GENEVA, IL 60134
Kane County (630) 232-0280
MRS. CARMEN HAMPSON NP
Nurse Practitioner
351 DELNOR DR, SUITE 300
GENEVA, IL 60134
Kane County (630) 262-1001
NICHOLAS FURIASSE M.D.
Internal Medicine (Cardiovascular Disease)
351 DELNOR DR
GENEVA, IL 60134
Kane County (630) 232-0280
DR. WILLIAM J MACKIN M.D.
Internal Medicine (Cardiovascular Disease)
351 DELNOR DR, SUITE 100
GENEVA, IL 60134
Kane County (630) 232-0280
DR. DEBORAH L HAY M.D.
Obstetrics & Gynecology
351 DELNOR DR
GENEVA, IL 60134
Kane County (630) 208-0784
CHRISTOPHER MICHAEL GEORGE M.D.
Internal Medicine (Hematology & Oncology)
351 DELNOR DR
GENEVA, IL 60134
Kane County (630) 232-0610
VAN ORTHOPAEDIC & SPINE SURGERY SC
Orthopaedic Surgery
351 DELNOR DR, SUITE 406
GENEVA, IL 60134
Kane County (630) 208-3099

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Kefer's NPI number?

The NPI number for John Kefer is 1477549103. It was assigned to this individual provider in the NPPES registry on September 27, 2005.

Where is John Kefer located?

John Kefer practices at 351 Delnor Dr, Geneva, IL 60134. The listed phone number is (630) 232-0280.

What is John Kefer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is John Kefer enrolled in Medicare?

Yes. John Kefer is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John Kefer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Kefer reassigns Medicare benefits to 3 organizations: Delnor Community Hospital (Geneva, IL), Central Dupage Hospital Association (Winfield, IL) and Central Dupage Physician Group (Carol Stream, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Kefer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for John Kefer was last updated on January 31, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.