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

Thomas Carl Ziolkowski, DO

Individual provider Surgery Physician · NPI 1295975068

Thomas Carl Ziolkowski, DO practises General Surgery in Greenville, Michigan. Graduated from University of New England, College of Osteo Medicine in 2006, 20 years ago. Practices with Spectrum Health United, a 88-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
20
Trained at
University of New England, College of Osteo Medicine
Licensed in
MI
In the registry since
2009
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

707 S Greenville West Dr
Greenville, MI 48838-2102
Phone: (616) 754-3001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 421 S Baldwin St, Greenville, MI 48838-2102 — (616) 225-8667

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 5101021507 (MI)

Record details

NPI number1295975068
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 5, 2009
Last updated in NPPESFebruary 23, 2021
Certification dateFebruary 23, 2021

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF NEW ENGLAND, COLLEGE OF OSTEO MEDICINE
Graduated 2006 (20 years in practice)
Group practice Spectrum Health United — 88 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 22 times · 49th percentile
Hernia repair (minimally invasive) 1–10 times
Hernia repair - groin (open) 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients65
Services billed 91 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Spectrum Health United

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 88 clinicians in the practice; 12 are shown here.

Other providers in Greenville