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

Dr. Mark Warren Hiser, MD

Individual provider Cardiovascular Disease Physician · NPI 1538184924

Dr. Mark Warren Hiser, MD is a Cardiac Electrophysiology in Rockford, Illinois. Qualified in 1972, 54 years ago. Practices with Osf Multi-Specialty Group, a 2,128-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
54
Licensed in
IL
In the registry since
2006
Specialties on file
5
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

444 Roxbury Rd
Rockford, IL 61107-5059
Phone: (815) 398-3000
Fax: (815) 398-3041
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 36055207 (IL)
Clinical Cardiac Electrophysiology Physician Taxonomy 207RC0001X · Licence 36055207 (IL)
Interventional Cardiology Physician Taxonomy 207RI0011X · Licence 36055207 (IL)
Body Imaging Physician Taxonomy 2085B0100X · Licence 36055207 (IL)
Diagnostic Ultrasound Physician Taxonomy 2085U0001X · Licence 36055207 (IL)

Record details

NPI number1538184924
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 13, 2006
Last updated in NPPESNovember 11, 2009
Mailing addressPo Box 6003, Rockford, IL 61126-6003

Medicare enrollment

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

Medicare specialtyCARDIAC ELECTROPHYSIOLOGY
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 1972 (54 years in practice)
Group practice Osf Multi-Specialty Group — 2128 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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