Thomas L. Michalsen, D.O.
General Practice Physician · Kirkland, IL
Thomas L. Michalsen, D.O. is a general practice physician with a practice address in Kirkland, Illinois, and NPI 1114947876, issued on Jul 19, 2006. Check the license (Illinois 036066772, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas L. Michalsen
- Credential
- D.O.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 036066772 IL
Self-reported in NPPES; status is on the state search - Practice location
- 406 S 5TH St, Kirkland, IL 60146
- Phone
- (815) 522-3301
- Enumerated
- Jul 19, 2006
- Record last updated
- Aug 22, 2022
- Fax
- (815) 522-3855
- Medicare enrollment
- Enrolled (PECOS I20080718000036); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1983
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 291 in Illinois → Look up another NPI →
Also registered at 406 S 5TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cathy Carlson, PHD, FNP-BCFamily Nurse Practitioner1225431653
Verify Thomas L. Michalsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036066772Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21.0 times the Medicare Part D claims of the average general practice physician in 2024
63,580 Medicare Part D claims for 1,732 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 425 claims were for opioids.
Most prescribed
- Furosemide2,556 claims
- Levothyroxine Sodium2,270 claims
- Gabapentin2,250 claims
- Atorvastatin Calcium2,150 claims
- Amlodipine Besylate1,803 claims
- Potassium Chloride1,755 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $381.87
7 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 4,259 providers of this specialty with any payment received $1,273.40 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Select Rehabilitation, LLCGlenview, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas L. Michalsen among 291 general practice physician records in Illinois
Thomas L. Michalsen, D.O. is one of 291 general practice physician records with a practice address in Illinois. 42% 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, 57% newer
- In a Medicare fileYes · 42% of these records are
- In the CMS Doctors and Clinicians fileYes · 18% of these records are
- Graduated1983 · median 1998 among the 52 with a school on file
- Record last updated2022 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 general practice physician record lists a practice address in Kirkland
They are 1 of the 10 NPPES records with a practice address in Kirkland, and 291 general practice physician records in Illinois.
All 291 in Illinois → Every provider in Kirkland → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
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- Anthony Barnstable, DVMHampshire, IL 601401477224210
- Amitha Avasarala, M.D.Maywood, IL 601531104388024
- Faith Buchanan, MDMaywood, IL 601531659625390
- Malgorzata Hasek, MD, MPHMaywood, IL 601531508181173
- Ayman Mahdi, MDMaywood, IL 601531497331847
- Brian PowellMaywood, IL 601531225422330
- Veronica Whittington, MDMaywood, IL 601531902300155
Common questions
What is Thomas L. Michalsen, D.O.'s NPI number?
Thomas L. Michalsen, D.O.'s National Provider Identifier (NPI) is 1114947876, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas L. Michalsen, D.O. located?
The NPPES record lists a practice address at 406 S 5TH St, Kirkland, IL, 60146. Phone: (815) 522-3301. Providers update this record themselves, so call before visiting.
How can I verify Thomas L. Michalsen, D.O.'s license?
NPPES lists Illinois license number 036066772, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas L. Michalsen, D.O. prescribe under Medicare Part D?
In 2024, Thomas L. Michalsen, D.O. had 63,580 Medicare Part D claims for 1,732 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
What is Thomas L. Michalsen, D.O.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.