Sara L. Koster, FNP-BC
Family Nurse Practitioner · Grand Rapids, MI
Sara L. Koster, FNP-BC is a family nurse practitioner with a practice address in Grand Rapids, Michigan, and NPI 1740575877, issued on Jun 16, 2011. Check the license (Michigan 4704169831, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sara L. Koster
- Credential
- FNP-BC
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 4704169831 MI
Self-reported in NPPES; status is on the state search - Practice location
- 100 Michigan St NE, Grand Rapids, MI 49503
- Phone
- (616) 391-1680
- Enumerated
- Jun 16, 2011
- Record last updated
- Mar 26, 2026
- Medicare enrollment
- Enrolled (PECOS I20110810000652); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,356 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.
- Aly Abdel-Mageed, MDPediatric Hematology & Oncology Physician1851361190
- Muriam Afzal, MDFamily Medicine Physician1174759906
- Shefali Aggarwal, M.DPediatric Critical Care Medicine Physician1720408313
- Muhammad Ali Akbar, MDInternal Medicine Physician1518529742
- Ghassan Al Nabhan, M.D.Internal Medicine Physician1326458068
- Zain AlajjouriEmergency Medicine Physician1366183295
Verify Sara L. Koster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 4704169831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average family nurse practitioner in 2024
237 Medicare Part D claims for 177 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin38 claims
- Prednisone32 claims
- Amoxicillin-Clavulanate Potass20 claims
- Albuterol Sulfate Hfa16 claims
- Azithromycin13 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.
Bills Medicare through one group practice
- Metropolitan HospitalGrand Rapids, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sara L. Koster among 5,356 family nurse practitioner records in Michigan
Sara L. Koster, FNP-BC is one of 5,356 family nurse practitioner records with a practice address in Michigan. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 14% of them.
- NPI issued2011 · 14% of these records are older, 83% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2010 · median 2019 among the 3,254 with a school on file
- Record last updated2026 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
290 family nurse practitioner records list a practice address in Grand Rapids
They are 290 of the 18,005 NPPES records with a practice address in Grand Rapids, and 5,356 family nurse practitioner records in Michigan.
All 5,356 in Michigan → Every provider in Grand Rapids → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Laura Ackerman, CFNPGrand Rapids, MI 495031063449585
- Joann Baar, FNPGrand Rapids, MI 495031063436533
- Julie Bekius, FNPGrand Rapids, MI 495031629068309
- Sarah Boomstra, NPGrand Rapids, MI 495031215977509
- Christine Dunnuck, NPGrand Rapids, MI 495031487666749
- Teresa Farah, NPGrand Rapids, MI 495031235158080
- Daniel Hoekstra, NPGrand Rapids, MI 495031205941622
- Shannon Iakiri, N.P.Grand Rapids, MI 495031821021098
Common questions
What is Sara L. Koster, FNP-BC's NPI number?
Sara L. Koster, FNP-BC's National Provider Identifier (NPI) is 1740575877, issued on Jun 16, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Sara L. Koster, FNP-BC located?
The NPPES record lists a practice address at 100 Michigan St NE, Grand Rapids, MI, 49503. Phone: (616) 391-1680. Providers update this record themselves, so call before visiting.
How can I verify Sara L. Koster, FNP-BC's license?
NPPES lists Michigan license number 4704169831, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Sara L. Koster, FNP-BC prescribe under Medicare Part D?
In 2024, Sara L. Koster, FNP-BC had 237 Medicare Part D claims for 177 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
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.