William C. Haselow, M.D.
Emergency Medicine Physician · Eau Claire, WI
William C. Haselow, M.D. is an emergency medicine physician with a practice address in Eau Claire, Wisconsin, and NPI 1811942444, issued on May 23, 2006. Check the license (Wisconsin 30013-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William C. Haselow
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 30013-020 WI
30013-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 900 W Clairemont Ave, Eau Claire, WI 54701
- Phone
- (414) 290-6715
- Enumerated
- May 23, 2006
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (414) 290-6755
- Medicaid ID
- 31809700 WI
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 900 W Clairemont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jaimee Anders, CSFA, CSA, CSTSurgical Assistant1932618295
- Jessica Armstrong, NPNurse Practitioner1619291747
- David Bardsley, M.D.Emergency Medicine Physician1386693711
- Gina BiermanPhysician Assistant1679271860
- Rebecca Blanchette, PTPhysical Therapist1487216024
- Dennis Breen, MDFamily Medicine Physician1417986316
Verify William C. Haselow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 30013-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average emergency medicine physician in 2024
156 Medicare Part D claims for 114 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Prednisone19 claims
- Ondansetron Odt12 claims
- Amoxicillin-Clavulanate Potass11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William C. Haselow among 1,464 emergency medicine physician records in Wisconsin
William C. Haselow, M.D. is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2021 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 emergency medicine physician records list a practice address in Eau Claire
They are 66 of the 3,085 NPPES records with a practice address in Eau Claire, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Eau Claire → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Patrick Ayer, MDEau Claire, WI 547011659358174
- Jeremy Baker, MDEau Claire, WI 547011568043222
- David Bardsley, M.D.Eau Claire, WI 547011386693711
- Cheryl Colbenson, D.O.Eau Claire, WI 547011114959970
- Kirk Dahl, MDEau Claire, WI 547011760440242
- Stanley Daniel, M.D.Eau Claire, WI 547011861535734
- Steven Hall, M.D.Eau Claire, WI 547011265531651
- Humayun Khan, MDEau Claire, WI 547011982705505
Common questions
What is William C. Haselow, M.D.'s NPI number?
William C. Haselow, M.D.'s National Provider Identifier (NPI) is 1811942444, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William C. Haselow, M.D. located?
The NPPES record lists a practice address at 900 W Clairemont Ave, Eau Claire, WI, 54701. Phone: (414) 290-6715. Providers update this record themselves, so call before visiting.
How can I verify William C. Haselow, M.D.'s license?
NPPES lists Wisconsin license number 30013-020, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William C. Haselow, M.D. prescribe under Medicare Part D?
In 2024, William C. Haselow, M.D. had 156 Medicare Part D claims for 114 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.