Kirsten Oosterbaan, PA-C
Medical Physician Assistant · Grand Rapids, MI
Kirsten Oosterbaan, PA-C is a medical physician assistant with a practice address in Grand Rapids, Michigan, and NPI 1306202072, issued on Jan 11, 2016. Check the license (Michigan 5601007651, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kirsten Oosterbaan
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 5601007651 MI
Self-reported in NPPES; status is on the state search - Practice location
- 100 Michigan St NE, Grand Rapids, MI 49503
- Phone
- (616) 486-6790
- Enumerated
- Jan 11, 2016
- Record last updated
- Feb 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (616) 486-6702
- Medicare enrollment
- Enrolled (PECOS I20160308002337); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 1,140 in Michigan → Look up another NPI →
Also registered at 100 Michigan St NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kirsten Oosterbaan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 5601007651Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average medical physician assistant in 2024
455 Medicare Part D claims for 124 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Buprenorphine-Naloxone31 claims
- Amlodipine Besylate29 claims
- Levothyroxine Sodium22 claims
- Omeprazole21 claims
- Bupropion Xl18 claims
- Lisinopril16 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): 100 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).
Industry payments in 2024: $111.70
6 payments; by number, the most common kind was food and beverage; the largest payer was Indivior Inc. The 16,165 providers of this specialty with any payment received $1,055.00 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 Primary Care PartnersKentwood, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kirsten Oosterbaan among 1,140 medical physician assistant records in Michigan
Kirsten Oosterbaan, PA-C is one of 1,140 medical physician assistant records with a practice address in Michigan. 74% 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 69% of them.
- NPI issued2016 · 69% of these records are older, 27% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2016 · median 2012 among the 613 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in Michigan
There are 1,140 medical physician assistant records in Michigan.
All 1,140 in Michigan → Every provider in Grand Rapids → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Mark Altman, PA-CGrand Rapids, MI 495031417935750
- Sheryl Chapin, P.A.Grand Rapids, MI 495031295754604
- James Dernocoeur, PAGrand Rapids, MI 495031083609374
- Catherine Hallenbeck, PA-CGrand Rapids, MI 495031104838564
- Gretchen Holt-Vredevoogd, PA-CGrand Rapids, MI 495031366557688
- Sarah Janke, PAGrand Rapids, MI 495031952313983
- Scott Lawrence, PA-CGrand Rapids, MI 495031003830225
- Julie Maring, P.A.Grand Rapids, MI 495031104845510
Common questions
What is Kirsten Oosterbaan, PA-C's NPI number?
Kirsten Oosterbaan, PA-C's National Provider Identifier (NPI) is 1306202072, issued on Jan 11, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Kirsten Oosterbaan, PA-C located?
The NPPES record lists a practice address at 100 Michigan St NE, Grand Rapids, MI, 49503. Phone: (616) 486-6790. Providers update this record themselves, so call before visiting.
How can I verify Kirsten Oosterbaan, PA-C's license?
NPPES lists Michigan license number 5601007651, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Kirsten Oosterbaan, PA-C prescribe under Medicare Part D?
In 2024, Kirsten Oosterbaan, PA-C had 455 Medicare Part D claims for 124 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Kirsten Oosterbaan, PA-C's MIPS final score?
The 2023 MIPS final score is 100 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.