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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Warren Hiser, M.D.

Cardiovascular Disease Physician in Rockford, IL · enumerated 2006 · practices at Rockford Cardiology Associates, Ltd.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538184924

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Warren Hiser
Credential M.D.
Sex Male
Practice address 444 Roxbury Road, Rockford, IL, 61107
Phone (815) 398-3000
Fax (815) 398-3041
Enumeration date Jul 13, 2006
Last updated in NPPES Nov 11, 2009

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 36055207 (IL) Primary
207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License 36055207 (IL) Secondary
207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 36055207 (IL) Secondary
2085B0100X Body Imaging Physician Allopathic & Osteopathic Physicians · License 36055207 (IL) Secondary
2085U0001X Diagnostic Ultrasound Physician Allopathic & Osteopathic Physicians · License 36055207 (IL) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
101 15501 Other IL B/C B/S OF ILLINOIS
CB0709/060009209 Other GA RR MEDICARE GROUP ID#/PIN
036055207 1 Medicaid IL -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Mark Hiser?
The National Provider Identifier (NPI) for Mark Hiser is 1538184924, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Hiser practice?
The practice location on file with NPPES is in Rockford, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-11.