Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Jonas Mieczyslaw Kwiatkowski, MD

Individual provider Hospitalist Physician · NPI 1346796646

Jonas Mieczyslaw Kwiatkowski, MD is an Internal Medicine in Mason City, Iowa. Qualified in 2016, 10 years ago. Practices with Cogent Healthcare of Iowa PC, a 59-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Iowa and Oregon.

Years since qualifying
10
Licensed in
IA, OR
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1000 4th St SW
Mason City, IA 50401-2800
Phone: (641) 428-5192
Fax: (641) 428-8041
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2801 N Gantenbein Ave, Portland, OR 97227-1623 — (503) 413-8407

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence MD-46838 (IA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD227509 (OR)

Record details

NPI number1346796646
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 28, 2016
Last updated in NPPESNovember 3, 2025
Certification dateNovember 3, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Cogent Healthcare Of Iowa Pc — 59 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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