Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Zackary Thomas Franzen, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1851851018

Zackary Thomas Franzen, MD practises Internal Medicine in Rockford, Illinois. Qualified in 2019, 7 years ago. Practices with Osf Multi-Specialty Group, a 2,128-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Florida and Illinois.

Years since qualifying
7
Licensed in
FL, IL
In the registry since
2019
Specialties on file
2
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

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Rockford, IL

No coordinates on file. Search this address in Google Maps

Additional practice locations (3)

  • 670 Glades Rd Ste 400, Boca Raton, FL 33431-6464 — (561) 955-2570
  • 800 Meadows Rd, Boca Raton, FL 33486-2304 — (561) 955-5365
  • 5666 E State St, Rockford, IL 61108-2425 — (815) 226-2000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036160276 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X (FL)

Record details

NPI number1851851018
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 23, 2019
Last updated in NPPESJuly 28, 2022
Certification dateJuly 28, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Osf Multi-Specialty Group — 2128 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients278
Services billed 784 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

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 Rockford