Jonas Mieczyslaw Kwiatkowski, MD
Hospitalist Physician · Mason City, IA
Jonas Mieczyslaw Kwiatkowski, MD is a hospitalist physician with a practice address in Mason City, Iowa, and NPI 1346796646, issued on Aug 28, 2016. Check the license (Iowa MD-46838, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Jonas Mieczyslaw Kwiatkowski
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- MD-46838 IA
MD227509 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1000 4TH St SW, Mason City, IA 50401
- Phone
- (641) 428-5192
- Enumerated
- Aug 28, 2016
- Record last updated
- Nov 3, 2025
- Fax
- (641) 428-8041
- Medicare enrollment
- Enrolled (PECOS I20200805000961); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 302 in Iowa → Look up another NPI →
Also registered at 1000 4TH St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonas Mieczyslaw Kwiatkowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-46838Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average hospitalist physician in 2024
392 Medicare Part D claims for 168 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 20 claims were for opioids.
Most prescribed
- Cefdinir29 claims
- Furosemide24 claims
- Atorvastatin Calcium21 claims
- Hydralazine Hcl15 claims
- Clopidogrel14 claims
- Azithromycin13 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.
Bills Medicare through 2 group practices
- Cogent Healthcare OF Iowa PCMason City, IA
- Legacy Clinics LLCPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonas Mieczyslaw Kwiatkowski among 302 hospitalist physician records in Iowa
Jonas Mieczyslaw Kwiatkowski, MD is one of 302 hospitalist physician records with a practice address in Iowa. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 50% of them.
- NPI issued2016 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated2016 · median 2014 among the 243 with a school on file
- Record last updated2025 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Iowa
There are 302 hospitalist physician records in Iowa.
All 302 in Iowa → Every provider in Mason City → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Mohamed Abd El MaksoudMason City, IA 504011033792825
- Luna Acharya, MDMason City, IA 504011609224674
- Thomas Delaney, MDMason City, IA 504011033226469
- Sumathy Iyengar, M.D.,Mason City, IA 504011013173723
- Rupesh Kshetri, MDMason City, IA 504011871926444
- Maureen Muke, MDMason City, IA 504011497019483
- Mahad Rayale, MDMason City, IA 504011053807578
- Dustin Uhlenhopp, DODes Moines, IA 503171871085019
Common questions
What is Jonas Mieczyslaw Kwiatkowski, MD's NPI number?
Jonas Mieczyslaw Kwiatkowski, MD's National Provider Identifier (NPI) is 1346796646, issued on Aug 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Jonas Mieczyslaw Kwiatkowski, MD located?
The NPPES record lists a practice address at 1000 4TH St SW, Mason City, IA, 50401. Phone: (641) 428-5192. Providers update this record themselves, so call before visiting.
How can I verify Jonas Mieczyslaw Kwiatkowski, MD's license?
NPPES lists Iowa license number MD-46838, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonas Mieczyslaw Kwiatkowski, MD prescribe under Medicare Part D?
In 2024, Jonas Mieczyslaw Kwiatkowski, MD had 392 Medicare Part D claims for 168 beneficiaries; the average among hospitalist physician prescribers was 521. 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.