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

Mark J Wolfmeyer, MD

Individual provider Internal Medicine Physician · NPI 1427266279

Mark J Wolfmeyer, MD is a Hospitalist in Peoria, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 2004, 22 years ago. Practices with Osf Multi-Specialty Group, a 2,128-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
22
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
IL
In the registry since
2007
Specialties on file
4
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

520 NE Glen Oak Ave
Peoria, IL 61637-0001 Not confirmed with CMS for 18 years — call before visiting
Phone: (309) 655-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036-119781 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 125-047489 (IL)
Pediatrics Physician Taxonomy 208000000X · Licence 125-047489 (IL)
Pediatrics Physician Taxonomy 208000000X · Licence 036-119781 (IL)

Record details

NPI number1427266279
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 17, 2007
Last updated in NPPESSeptember 26, 2008

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE, PEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 2004 (22 years in practice)
Group practice Osf Multi-Specialty Group — 2128 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 patients100
Services billed 574 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.

Practises at

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

Also affiliated with 1 inpatient rehabilitation facility and 1 long-term care hospital, which CMS identifies by certification number only.

Colleagues at Osf Multi-Specialty Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2128 clinicians in the practice; 12 are shown here.

Other providers in Peoria