DR. NATHAN MICHAEL LARSEN (M.D.) – Emergency Medicine Physician, NPI 1992887848
Emergency Medicine Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
1,309 EMERGENCY MEDICINE in WI
Provider Addresses for DR. NATHAN MICHAEL LARSEN (M.D.)
800 RIVERSIDE DR
WAUPACA, WI 549811943
Phone: (715) 258-1000
Fax: (715) 258-2000
Type: Mailing
225 Memorial Dr
Berlin, WI 549231243
Phone: (920) 361-1313
Fax: (920) 361-5499
Type: Location
100 County Road B
Shawano, WI 541667072
Phone: (715) 526-2111
Fax: (715) 526-9166
Type: Location
1405 Mill St
New London, WI 549612155
Phone: (920) 531-2000
Type: Location
Fond-du-Lac, Northern Saskatchewan Administration District, Saskatchewan, Canada
FOND DU LAC, WI 549354560
Phone: (920) 929-2300
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2007-06-18
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 |
|---|---|---|---|---|
| I20070618000165 | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 54981)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | IL | |
| Emergency Medicine | WI | |
| Emergency Medicine | WI | |
| Emergency Medicine | WI | |
| Emergency Medicine | WI | |
| Emergency Medicine | WI | |
| Emergency Medicine | WI | |
| Emergency Medicine | 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.