WILLIAM C HASELOW (M.D.) – Emergency Medicine Physician, NPI 1811942444
Emergency Medicine Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for WILLIAM C HASELOW (M.D.)
2661 County Highway I
Chippewa Falls, WI 547295407
Phone: (414) 290-6715
Fax: (414) 290-6755
Type: Location
Chase Tower, 111, East Wisconsin Avenue, East Town, Milwaukee, Milwaukee County, Wisconsin, 53202, United States
SUITE 2000
MILWAUKEE, WI 532024815
Phone: (414) 290-6720
Fax: (414) 290-6755
Type: Mailing
Sacred Heart Hospital, 900, West Clairemont Avenue, Lower Campus, Upper Campus, Eau Claire, Eau Claire County, Wisconsin, 54701, United States
EAU CLAIRE, WI 547016122
Phone: (414) 290-6715
Fax: (414) 290-6755
Type: Location
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: 2005-07-25
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 |
|---|---|---|---|---|
| I20050725000575 | 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 | 160 | 154 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 147 | 137 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 75 | 75 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 42 | 42 | $0 |
| 99291 | Critical care, first 30-74 minutes | 30 | 29 | $0 |
Insurance plans in this area (ZIP 54729)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | WI | |
| Emergency Medicine | WI | |
| - | WI | |
| - | WI | |
| - | WI | |
| - | 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.