Katherine Ellen Kowalczyk, D.O.
Obstetrics & Gynecology Physician · Grand Rapids, MI
Katherine Ellen Kowalczyk, D.O. is an obstetrics & gynecology physician with a practice address in Grand Rapids, Michigan, and NPI 1295997633, issued on Jun 26, 2008. Check the license (Michigan 5101017587, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Katherine Ellen Kowalczyk
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 5101017587 MI
Self-reported in NPPES; status is on the state search - Practice location
- 100 Michigan St NE # MC027, Grand Rapids, MI 49503
- Phone
- (616) 391-2160
- Enumerated
- Jun 26, 2008
- Record last updated
- Dec 5, 2022
- Medicare enrollment
- Enrolled (PECOS I20130828000132); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,776 in Michigan → Look up another NPI →
Also registered at 100 Michigan St NE # MC027
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michelle Backus Colwell, M.D.Obstetrics & Gynecology Physician1124011531
- Nicole Bedore, MDObstetrics & Gynecology Physician1962694752
- Jan Buchanan, CNMAdvanced Practice Midwife1033253158
- Katheryn Clark, CNMAdvanced Practice Midwife1417489931
- Amanda Ezekiel, CNMAdvanced Practice Midwife1437606670
- Jennifer Freeman, CNMAdvanced Practice Midwife1750616454
Verify Katherine Ellen Kowalczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101017587Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 86.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $36.97
2 payments; by number, the most common kind was food and beverage; the largest payer was CooperSurgical, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Spectrum Health HospitalsGrand Rapids, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Ellen Kowalczyk among 1,776 obstetrics & gynecology physician records in Michigan
Katherine Ellen Kowalczyk, D.O. is one of 1,776 obstetrics & gynecology physician records with a practice address in Michigan. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 51% of them.
- NPI issued2008 · 51% of these records are older, 45% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2008 · median 2007 among the 1,003 with a school on file
- Record last updated2022 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
183 obstetrics & gynecology physician records list a practice address in Grand Rapids
They are 183 of the 18,005 NPPES records with a practice address in Grand Rapids, and 1,776 obstetrics & gynecology physician records in Michigan.
All 1,776 in Michigan → Every provider in Grand Rapids → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Michelle Backus Colwell, M.D.Grand Rapids, MI 495031124011531
- Adam Blickley, MDGrand Rapids, MI 495031679554679
- Jane Cottingham, MDGrand Rapids, MI 495031467442053
- Jeffrey Frank, MDGrand Rapids, MI 495031871584466
- Robyn Hubbard, MDGrand Rapids, MI 495031063403657
- Michelle Klyn, MDGrand Rapids, MI 495031235133992
- David Kreuze, M.D.Grand Rapids, MI 495031184614836
- Calvin Leazenby, M.DGrand Rapids, MI 495031588668248
Common questions
What is Katherine Ellen Kowalczyk, D.O.'s NPI number?
Katherine Ellen Kowalczyk, D.O.'s National Provider Identifier (NPI) is 1295997633, issued on Jun 26, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Ellen Kowalczyk, D.O. located?
The NPPES record lists a practice address at 100 Michigan St NE # MC027, Grand Rapids, MI, 49503. Phone: (616) 391-2160. Providers update this record themselves, so call before visiting.
How can I verify Katherine Ellen Kowalczyk, D.O.'s license?
NPPES lists Michigan license number 5101017587, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Katherine Ellen Kowalczyk, D.O.'s MIPS final score?
The 2023 MIPS final score is 86.4 of 100, reported for the practice group. 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.