Jason R. Koelewyn, MD
Family Medicine Physician · Sioux Center, IA
Jason R. Koelewyn, MD is a family medicine physician with a practice address in Sioux Center, Iowa, and NPI 1659592020, issued on May 1, 2007. Check the license (Iowa 37667, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Jason R. Koelewyn
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 37667 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 9TH St SE, Sioux Center, IA 51250
- Phone
- (712) 722-2609
- Enumerated
- May 1, 2007
- Record last updated
- Mar 17, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (712) 722-4325
- Medicare enrollment
- Enrolled (PECOS I20080812000837); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,336 in Iowa → Look up another NPI →
Also registered at 1101 9TH St SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lorianne Andersen, MDFamily Medicine Physician1427279025
- Ashley AndersonClinical Social Worker1265057236
- Julie BajemaPhysical Therapist1801635305
- Jeffrey Barnable, PHARMDPharmacist1831875863
- Luis BarraganPhysician Assistant1356042907
- Lindsey Borkowski, LISWClinical Social Worker1750259149
Verify Jason R. Koelewyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 37667Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average family medicine physician in 2024
7,822 Medicare Part D claims for 358 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 188 claims were for opioids.
Most prescribed
- Atorvastatin Calcium470 claims
- Levothyroxine Sodium308 claims
- Losartan Potassium253 claims
- Omeprazole247 claims
- Amlodipine Besylate218 claims
- Tamsulosin Hcl202 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): 94 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).
One hospital affiliation
- Sioux Center HealthSioux Center, IA · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Jason R. Koelewyn among 2,336 family medicine physician records in Iowa
Jason R. Koelewyn, MD is one of 2,336 family medicine physician records with a practice address in Iowa. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 42% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2005 · median 2006 among the 1,367 with a school on file
- Record last updated2018 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 family medicine physician records list a practice address in Sioux Center
They are 15 of the 146 NPPES records with a practice address in Sioux Center, and 2,336 family medicine physician records in Iowa.
All 2,336 in Iowa → Every provider in Sioux Center → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lorianne Andersen, MDSioux Center, IA 512501427279025
- Robert Clemens, MDSioux Center, IA 512501689734576
- Paul Dejong, MDSioux Center, IA 512501801096599
- Richard Jongewaard, MDSioux Center, IA 512501124188040
- Delwyn Lassen, MDSioux Center, IA 512501558346015
- Casie Leightner, MDSioux Center, IA 512501497172456
- Dale Nystrom, MDSioux Center, IA 512501528128444
- Mary Rayborn, MDSioux Center, IA 512501992865828
Common questions
What is Jason R. Koelewyn, MD's NPI number?
Jason R. Koelewyn, MD's National Provider Identifier (NPI) is 1659592020, issued on May 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jason R. Koelewyn, MD located?
The NPPES record lists a practice address at 1101 9TH St SE, Sioux Center, IA, 51250. Phone: (712) 722-2609. Providers update this record themselves, so call before visiting.
How can I verify Jason R. Koelewyn, MD's license?
NPPES lists Iowa license number 37667, 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 Jason R. Koelewyn, MD prescribe under Medicare Part D?
In 2024, Jason R. Koelewyn, MD had 7,822 Medicare Part D claims for 358 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Jason R. Koelewyn, MD's MIPS final score?
The 2023 MIPS final score is 94 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.