Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Whitney, PA-C
Physician Assistant in Sycamore, IL · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1225445273
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Registry record
Entity type Individual (Type 1)
Name Mark Whitney
Credential PA-C
Sex Male
Practice address 1815 Mediterranean Dr Ste 103, Sycamore, IL, 60178
Phone (815) 981-4742
Enumeration date Jul 22, 2014
Last updated in NPPES Dec 21, 2021
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 085-005096 (IL) Primary
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.
Frequently asked questions
Where does Mark Whitney practice?
The practice location on file with NPPES is in Sycamore, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Whitney?
The National Provider Identifier (NPI) for Mark Whitney is 1225445273, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-21.