IOANNIS KARKATZOUNIS (MD) – Hospitalist Physician, NPI 1639335235
Hospitalist Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,824 INTERNAL MEDICINE in IL
Loading map...
Provider Addresses for IOANNIS KARKATZOUNIS (MD)
Illinois Valley Community Hospital, 925, West Street, Peru, LaSalle County, Illinois, 61354, United States
PERU, IL 613542757
Phone: (815) 223-3300
Type: Mailing
4 STONEBROOK CT
BLOOMINGTON, IL 617044156
Phone: (312) 730-8637
Type: Mailing
855 N WESTHAVEN DR
OSHKOSH, WI 549047668
Phone: (920) 303-8700
Fax: (920) 456-7601
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 12 Open Payments records for all available years, with a total value of $386.
Total Amount is formed as General ($386) + Research ($0) + Ownership ($0) = $386.
Last reported payment date: 2024-05-15 • Largest payer in this snapshot: HARMONY BIOSCIENCES LLC ($179).
Total Amount
$386
General + Research + Ownership
Payments
12
Total payment records
General Amount
$386
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-15
Latest reported date
Top Companies
Largest payers in this snapshot
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-03-17
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090813000167 | I | Hospitalist | IL | TBD |
| I20240814000612 | I | Hospitalist | WI | TBD |
| I20250317002957 | I | Hospitalist | IA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 663 | 274 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 251 | 238 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 147 | 142 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 90 | 48 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 34 | 33 | $0 |
Insurance plans in this area (ZIP 61354)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | GA | |
| Internal Medicine | NY | |
| - | GA | |
| Internal Medicine | SC | |
| - | KY | |
| H O S P I T A L I S T | SC | |
| Internal Medicine, Hospitalist | TN | |
| Internal Medicine, Hospitalist | SC | |
| Hospitalist, Family Practice, Family Practice | VA | |
| Internal Medicine | GA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.