JOHN A ZERNIA (MD) – Emergency Medicine Physician, NPI 1124022728
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,309 EMERGENCY MEDICINE in WI
Loading map...
Provider Addresses for JOHN A ZERNIA (MD)
1836, South Avenue, La Crosse, La Crosse County, Wisconsin, 54601, United States
LA CROSSE, WI 546015429
Phone: (608) 782-7300
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 20 Open Payments records for all available years, with a total value of $63,800.
Total Amount is formed as General ($63,800) + Research ($0) + Ownership ($0) = $63,800.
Last reported payment date: 2024-12-09 • Largest payer in this snapshot: Takeda Pharmaceuticals U.S.A., Inc. ($63,800).
Total Amount
$63,800
General + Research + Ownership
Payments
20
Total payment records
General Amount
$63,800
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-09
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $63,800 |
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: 2011-10-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20111019000845 | I | Emergency Medicine | WI | 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 |
|---|---|---|---|---|
| 99285 | Emergency department visit with high level of medical decision making | 50 | 47 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 45 | 45 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 26 | 26 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 18 | 18 | $0 |
Insurance plans in this area (ZIP 54601)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | WI | |
| - | WI | |
| Diagnostic Radiology, Interventional Radiology, Diagnostic Radiology | WI | |
| O P H T H A L M O L O G Y | WI | |
| Diagnostic Radiology | WI | |
| - | WI | |
| Cardiovascular Disease (Cardiology), Internal Medicine, Interventional Cardiology, Cardiovascular Disease (Cardiology) | NY | |
| Nurse Practitioner | WI | |
| Nurse Practitioner | WI | |
| - | WI |
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.