Marylynn Gaastra, PA
NPI 1841582327 · Internal Medicine Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marylynn Gaastra, PA is a Internal Medicine Physician provider in Grand Rapids, MI (NPI 1841582327).
Provider details
- NPI number
- 1841582327
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 5601006007 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
473 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 373 | $87 |
| Nursing Facility Discharge Management, More Than 30 Minutes99316 | 38 | $106 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, at Least 10 Minutes99307 | 36 | $32 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 26 | $125 |
Typical Medicare-allowed amounts for these services range $32–$125 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 71 | 21 |
| Apixabanbrand: Eliquis | 63 | — |
| Potassium Chloride | 58 | 11 |
| Sacubitril/Valsartanbrand: Entresto | 37 | — |
| Vortioxetine Hydrobromidebrand: Trintellix | 36 | — |
| Amlodipine Besylate | 36 | — |
| Insulin Glargine,hum.rec.anlog |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$341 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-05-03
- Last updated
- 2016-06-06
Frequently asked questions
- What is Marylynn Gaastra's NPI number?
- Marylynn Gaastra's National Provider Identifier (NPI) is 1841582327, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marylynn Gaastra's specialty?
- Marylynn Gaastra is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marylynn Gaastra located?
- Marylynn Gaastra's practice location on file with NPPES is 4118 Kalamazoo Ave Se, Grand Rapids, MI 49508-3605.
- What is Marylynn Gaastra's phone number?
- The practice phone number listed in the NPPES registry for Marylynn Gaastra is (231) 780-6080.
- Does Marylynn Gaastra accept Medicare?
- Marylynn Gaastra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marylynn Gaastra's NPI active?
- Yes — Marylynn Gaastra's NPI (1841582327) is active in the NPPES registry as of the last update on 2016-06-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.