Thomas L. Nielsen, MD
Emergency Medicine Physician · Wausau, WI
Thomas L. Nielsen, MD is an emergency medicine physician with a practice address in Wausau, Wisconsin, and NPI 1982765806, issued on Dec 13, 2006. Check the license (Wisconsin 41104, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Thomas L. Nielsen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 41104 WI
Self-reported in NPPES; status is on the state search - Practice location
- 333 Pine Ridge Blvd, Wausau, WI 54401
- Phone
- (715) 847-2121
- Enumerated
- Dec 13, 2006
- Record last updated
- Mar 12, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 32630800 WI
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 333 Pine Ridge Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Olivia Addison, M.S., CF-SLPSpeech-Language Pathologist1801485420
- Belal Afridi, MDEmergency Medicine Physician1548218308
- Sydney AlexanderOccupational Therapist1124689104
- Alanna AmbrosiusPharmacist1558213330
- Katelin BagleyOncology Registered Nurse1194678284
- Victoria BallardGenetic Counselor (M.S.)1942872791
Verify Thomas L. Nielsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 41104Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average emergency medicine physician in 2024
233 Medicare Part D claims for 148 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 27 claims were for opioids.
Most prescribed
- Prednisone40 claims
- Ondansetron Odt23 claims
- Cephalexin19 claims
- Tramadol Hcl14 claims
- Famotidine13 claims
- Hydrocodone-Acetaminophen12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Thomas L. Nielsen among 1,464 emergency medicine physician records in Wisconsin
Thomas L. Nielsen, MD 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 updated2008 · 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).
Emergency Medicine Physician providers in Wisconsin
There are 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Wausau → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Belal Afridi, MDWausau, WI 544011548218308
- Paul Gill, MDWausau, WI 544011528422623
- Bartholomew Hobson, MDWausau, WI 544011225138985
- Scott Howells, MDWausau, WI 544011538220413
- Thomas Hupy, M.D.Wausau, WI 544011144255274
- Thomas Koepke, MDWausau, WI 544011912068982
- Mark Mirick, MDWausau, WI 544011528129426
- Gregory Obst, MDWausau, WI 544011629139548
Common questions
What is Thomas L. Nielsen, MD's NPI number?
Thomas L. Nielsen, MD's National Provider Identifier (NPI) is 1982765806, issued on Dec 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas L. Nielsen, MD located?
The NPPES record lists a practice address at 333 Pine Ridge Blvd, Wausau, WI, 54401. Phone: (715) 847-2121. Providers update this record themselves, so call before visiting.
How can I verify Thomas L. Nielsen, MD's license?
NPPES lists Wisconsin license number 41104, 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 Thomas L. Nielsen, MD prescribe under Medicare Part D?
In 2024, Thomas L. Nielsen, MD had 233 Medicare Part D claims for 148 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Thomas L. Nielsen, MD's MIPS final score?
The 2023 MIPS final score is 83.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.