Katherine Denise Oyster, MD
Family Medicine Physician · Grand Rapids, MI
Katherine Denise Oyster, MD is a family medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1902245681, issued on Jun 17, 2013. Check the license (Michigan 4301102931, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Katherine Denise Oyster
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4301102931 MI
Self-reported in NPPES; status is on the state search - Practice location
- 300 Lafayette Ave SE Ste 4000, Grand Rapids, MI 49503
- Phone
- (616) 685-6922
- Enumerated
- Jun 17, 2013
- Record last updated
- Mar 11, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160805002198); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2013
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,013 in Michigan → Look up another NPI →
Also registered at 300 Lafayette Ave SE Ste 4000
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Denise Oyster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301102931Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average family medicine physician in 2024
1,217 Medicare Part D claims for 97 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 36 claims were for opioids.
Most prescribed
- Atorvastatin Calcium73 claims
- Omeprazole50 claims
- Lisinopril43 claims
- Levothyroxine Sodium41 claims
- Rosuvastatin Calcium40 claims
- Metoprolol Succinate34 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
- Allina Health SystemAnnandale, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Denise Oyster among 6,013 family medicine physician records in Michigan
Katherine Denise Oyster, MD is one of 6,013 family medicine physician records with a practice address in Michigan. 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 2013, is newer than 63% of them.
- NPI issued2013 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2013 · median 2008 among the 3,493 with a school on file
- Record last updated2021 · 58% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
317 family medicine physician records list a practice address in Grand Rapids
They are 317 of the 18,005 NPPES records with a practice address in Grand Rapids, and 6,013 family medicine physician records in Michigan.
All 6,013 in Michigan → Every provider in Grand Rapids → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
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- Michael Bishop, MDGrand Rapids, MI 495031316920614
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- John Cavacece, DOGrand Rapids, MI 495031093768244
- Ho-See Chan, MDGrand Rapids, MI 495031588617914
- Laurie Daum, MDGrand Rapids, MI 495031457302184
- Maged Hamed, MDGrand Rapids, MI 495031275509044
Common questions
What is Katherine Denise Oyster, MD's NPI number?
Katherine Denise Oyster, MD's National Provider Identifier (NPI) is 1902245681, issued on Jun 17, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Denise Oyster, MD located?
The NPPES record lists a practice address at 300 Lafayette Ave SE Ste 4000, Grand Rapids, MI, 49503. Phone: (616) 685-6922. Providers update this record themselves, so call before visiting.
How can I verify Katherine Denise Oyster, MD's license?
NPPES lists Michigan license number 4301102931, 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.
How much does Katherine Denise Oyster, MD prescribe under Medicare Part D?
In 2024, Katherine Denise Oyster, MD had 1,217 Medicare Part D claims for 97 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.