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JONAS MIECZYSLAW KWIATKOWSKI MD
NPI 1346796646
Hospitalist in Mason City, IA

Active since August 28, 2016PECOS EnrolledAccepts Medicare Assignment
1000 4TH ST SW, MASON CITY, IA 50401(641) 428-5192(641) 428-8041 Get Directions Write a Review

NPPES record last updated: November 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 3, 2025, Aug 3, 2020, Jul 15, 2020 and 1 more (4 updates tracked since 2016).

About Jonas Mieczyslaw Kwiatkowski Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JONAS MIECZYSLAW KWIATKOWSKI MD (NPI 1346796646) is an individual hospitalist provider in Mason City, Iowa, licensed in Iowa (MD-46838) and active in the NPI registry since August 2016. He is enrolled in Medicare PECOS, is affiliated with Mercyone North Iowa Medical Center, and maintains a secondary practice location in Portland.

NPPES Registry Identity

NPI1346796646
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameJONAS MIECZYSLAW KWIATKOWSKICredential: MD
Location Address1000 4TH ST SWMason City, IA 50401-2800
Mailing Address1000 4th St SwMason City, IA 50401-2800 · (312) 770-0009 · Fax (641) 428-8041
Phone(641) 428-5192
Fax(641) 428-8041
Sole ProprietorYes
Medical School CMSOtherGraduated 2016
Enumeration DateAugust 28, 2016
Last NPPES UpdateNovember 3, 20254 updates tracked since enumeration
NPPES CertifiedNovember 3, 2025
✔ NPI 1346796646 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in IA · MD-46838
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License MD227509 (OR)
1000 4TH ST SW, Mason City, IA 50401
Open in Google Maps ↗

Secondary Practice Location 1

Location 12801 N Gantenbein AvePortland, OR 97227-1623 · Phone (503) 413-8407

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Jonas Mieczyslaw Kwiatkowski Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406142033
PECOS Enrollment IDI20200805000961, I20251031001747
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Jonas Kwiatkowski reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cogent Healthcare Of Iowa, PC
114 mi
Internal Medicine
701 10TH ST SE
Cedar Rapids, IA 52403
  • Reassigned Medicare billing, Iowa enrollment
  • 153 clinicians in this Medicare group
NPI 1982654497 (319) 861-7803
Legacy Clinics LLC
1,442 mi
Rural Health
36860 INDUSTRIAL WAY
Sandy, OR 97055
  • Reassigned Medicare billing, Oregon enrollment
  • 1,248 clinicians in this Medicare group
NPI 1730472192 (503) 826-0206

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
726 services298 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
268 services114 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
258 services240 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
189 services181 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
50 services34 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
13 services13 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercyone North Iowa Medical Center

Acute Care Hospitals · Mason City, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160064
Location1000 Fourth Street SWMason City, IA 50401 · Cerro Gordo County
Emergency services Birthing friendly

Legacy Emanuel Medical Center

Acute Care Hospitals · Portland, OR
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number380007
Location2801 N Gantenbein AvenuePortland, OR 97227 · Multnomah County
Emergency services Birthing friendly

Legacy Good Samaritan Medical Center

Acute Care Hospitals · Portland, OR
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number380017
Location1015 NW 22nd Avenue, W121Portland, OR 97210 · Multnomah County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$122.23 typical visit price
range $52.96 – $161.40
Typical copayment $30.55 (range $13.24 – $40.35)
Most-billed visit code 99204
Established Patient
$94.05 typical visit price
range $16.91 – $131.98
Typical copayment $23.51 (range $4.22 – $32.99)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers19 claims19 services$19.94 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers81 claims81 services$111.01 avg. paid by Medicare
Portable oxygen concentrator, rental E1392
DME-Oxygen and Supplies · category DC002N
2 suppliers55 claims55 services$36.92 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LINDA S VOLD LISW
Social Worker (Clinical)
1000 4TH ST SW, SUITE BS
MASON CITY, IA 50401
Cerro Gordo County (641) 422-7797
BURT HUMBURG MD
Internal Medicine
1000 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 428-7000
SUMATHY NAGRAJ IYENGAR M.D.,
Hospitalist
1000 4TH ST SW, MERCY MEDICAL CENTER-HOSPITALIST DEPT
MASON CITY, IA 50401
Cerro Gordo County (641) 428-7000
DR. SATINDERJIT SINGH M.D.
Emergency Medicine
1000 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 428-7234
ASHLEY MATERN ARNP
Nurse Practitioner (Family)
1000 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 428-6999
ROBERT D. FROEHNER CRNA
Nurse Anesthetist, Certified Registered
1000 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 422-7000
DR. THOMAS P DELANEY MD
Hospitalist
1000 4TH ST SW, SUITE HOSP
MASON CITY, IA 50401
Cerro Gordo County (641) 422-7000
NORTH IOWA MERCY CLINICS
Nurse Practitioner
1000 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 428-5932

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jonas Kwiatkowski's NPI number?

The NPI number for Jonas Kwiatkowski is 1346796646. It was assigned to this individual provider in the NPPES registry on August 28, 2016.

Where is Jonas Kwiatkowski located?

Jonas Kwiatkowski practices at 1000 4th St SW, Mason City, IA 50401. The listed phone number is (641) 428-5192.

What is Jonas Kwiatkowski's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Jonas Kwiatkowski enrolled in Medicare?

Yes. Jonas Kwiatkowski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Jonas Kwiatkowski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jonas Kwiatkowski reassigns Medicare benefits to 2 organizations: Cogent Healthcare Of Iowa, PC (Cedar Rapids, IA) and Legacy Clinics LLC (Sandy, OR). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jonas Kwiatkowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Jonas Kwiatkowski affiliated with any hospitals?

According to CMS data, Jonas Kwiatkowski is affiliated with Mercyone North Iowa Medical Center, Legacy Emanuel Medical Center and Legacy Good Samaritan Medical Center.

When was this NPI record last updated?

The NPPES record for Jonas Kwiatkowski was last updated on November 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.