Mary Lou Ernst-Woodhouse, DO
Dermatology Physician · Eau Claire, WI
Mary Lou Ernst-Woodhouse, DO is a dermatology physician with a practice address in Eau Claire, Wisconsin, and NPI 1225102452, issued on Nov 20, 2006. Check the license (Wisconsin 20817, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mary Lou Ernst-Woodhouse
- Credential
- DO
- Primary taxonomy
- Dermatology Physician 207N00000X
- License numbers
- 20817 WI
03200 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 Bellinger St, Eau Claire, WI 54703
- Phone
- (715) 838-5222
- Enumerated
- Nov 20, 2006
- Record last updated
- Jul 15, 2024
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 325 in Wisconsin → Look up another NPI →
Also registered at 1400 Bellinger St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Andrea Aguayo, PHARMDPharmacist1003507492
- Boshra Al Ibraheem, MDFamily Medicine Physician1376399444
Verify Mary Lou Ernst-Woodhouse in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 20817Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average dermatology physician in 2024
309 Medicare Part D claims for 110 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Ketoconazole62 claims
- Hydroxyzine Hcl31 claims
- Hydrocortisone16 claims
- Tacrolimus15 claims
- Metronidazole14 claims
- Calcipotriene12 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.
Mary Lou Ernst-Woodhouse among 325 dermatology physician records in Wisconsin
Mary Lou Ernst-Woodhouse, DO is one of 325 dermatology physician records with a practice address in Wisconsin. 82% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 57% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2024 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Wisconsin
There are 325 dermatology physician records in Wisconsin.
All 325 in Wisconsin → Every provider in Eau Claire → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Emily Fibeger, DOEau Claire, WI 547031508026980
- Sterling McKissack, M.D.Eau Claire, WI 547031285033290
- Johann Peikert, MDEau Claire, WI 547031881673044
- Stephanie Tadayon, MDEau Claire, WI 547031134650476
- Joy Walker, MDEau Claire, WI 547031033198429
- Lon Christianson, MDEau Claire, WI 547011760461156
- Elizabeth Demaree, DOEau Claire, WI 547011285164772
- Michael Diestelmeier, MDEau Claire, WI 547011851370241
Common questions
What is Mary Lou Ernst-Woodhouse, DO's NPI number?
Mary Lou Ernst-Woodhouse, DO's National Provider Identifier (NPI) is 1225102452, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Lou Ernst-Woodhouse, DO located?
The NPPES record lists a practice address at 1400 Bellinger St, Eau Claire, WI, 54703. Phone: (715) 838-5222. Providers update this record themselves, so call before visiting.
How can I verify Mary Lou Ernst-Woodhouse, DO's license?
NPPES lists Wisconsin license number 20817, 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 Mary Lou Ernst-Woodhouse, DO prescribe under Medicare Part D?
In 2024, Mary Lou Ernst-Woodhouse, DO had 309 Medicare Part D claims for 110 beneficiaries; the average among dermatology physician prescribers was 797. 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.