Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Mark D Lettinga, MD

Individual provider Emergency Medicine Physician · NPI 1609223767

Mark D Lettinga, MD practises Emergency Medicine in Grand Rapids, Michigan. Graduated from University of Michigan Medical School in 2016, 10 years ago. Practices with Ecs Western Michigan PC, a 201-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
10
Trained at
University of Michigan Medical School
Licensed in
MI
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

100 Michigan St NE
Grand Rapids, MI 49503-2560
Phone: (616) 391-1774
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4100 Embassy Dr Se, Grand Rapids, MI 49546-2416 — (616) 988-8220

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 4301507954 (MI)

Record details

NPI number1609223767
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 18, 2016
Last updated in NPPESMay 9, 2024
Certification dateMay 9, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 2016 (10 years in practice)
Group practice Ecs Western Michigan Pc — 201 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients208
Services billed 225 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $265 12 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Spectrum Health Hospital · Grand Rapids, MI · listed as Spectrum Health Hospital
  • Corewell Health Big Rapids Hospital Hospital · Big Rapids, MI
  • Corewell Health Zeeland Hospital Hospital · Zeeland, MI

Colleagues at Ecs Western Michigan PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 201 clinicians in the practice; 12 are shown here.

Other providers in Grand Rapids