Marylynn Joanna Gaastra, PA
Internal Medicine Physician · Grand Rapids, MI
Marylynn Joanna Gaastra, PA is an internal medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1841582327, issued on May 3, 2011. Check the license (Michigan 5601006007, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Marylynn Joanna Gaastra
- Credential
- PA
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 5601006007 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4118 Kalamazoo Ave SE, Grand Rapids, MI 49508
- Phone
- (231) 780-6080
- Enumerated
- May 3, 2011
- Record last updated
- Jun 6, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 4118 Kalamazoo Ave SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marylynn Joanna Gaastra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5601006007Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,224 Medicare Part D claims for 141 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 39 claims were for opioids.
Most prescribed
- Atorvastatin Calcium71 claims
- Eliquis63 claims
- Potassium Chloride58 claims
- Entresto37 claims
- Amlodipine Besylate36 claims
- Lantus Solostar36 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.
Industry payments in 2024: $340.51
3 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Marylynn Joanna Gaastra among 5,735 internal medicine physician records in Michigan
Marylynn Joanna Gaastra, PA is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% 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 57% of them.
- NPI issued2011 · 57% of these records are older, 41% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2016 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
451 internal medicine physician records list a practice address in Grand Rapids
They are 451 of the 18,005 NPPES records with a practice address in Grand Rapids, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Grand Rapids → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Brian Gavin, MDGrand Rapids, MI 495081710337647
- James Geissler, MDKentwood, MI 495081194729699
- Margaret Love, MDGrand Rapids, MI 495081396298337
- Kevin McCormick, MDKentwood, MI 495081043215486
- Derek Olson, DOKentwood, MI 495081770553901
- Peter Olson, M.D.Grand Rapids, MI 495081407807217
Common questions
What is Marylynn Joanna Gaastra, PA's NPI number?
Marylynn Joanna Gaastra, PA's National Provider Identifier (NPI) is 1841582327, issued on May 3, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Marylynn Joanna Gaastra, PA located?
The NPPES record lists a practice address at 4118 Kalamazoo Ave SE, Grand Rapids, MI, 49508. Phone: (231) 780-6080. Providers update this record themselves, so call before visiting.
How can I verify Marylynn Joanna Gaastra, PA's license?
NPPES lists Michigan license number 5601006007, 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 Marylynn Joanna Gaastra, PA prescribe under Medicare Part D?
In 2024, Marylynn Joanna Gaastra, PA had 1,224 Medicare Part D claims for 141 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.