Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William C Baseleon, OD
Optometrist in North Riverside, IL · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861155871
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Registry record
Entity type Individual (Type 1)
Name Dr. William C Baseleon
Credential OD
Sex Male
Practice address 7222 W Cermak Rd, North Riverside, IL, 60546
Phone (708) 447-1497
Enumeration date Oct 17, 2021
Last updated in NPPES Oct 17, 2021
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
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
Is NPI 1861155871 active?
Yes, as of the latest NPPES snapshot, NPI 1861155871 is active (record last updated 2021-10-17).
How do I verify William Baseleon's NPI record?
Cross-check NPI 1861155871 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Watermark Physician Services Clinic/Center · North Riverside, IL NPI 1922068477 The Riverside Eye Corp Durable Medical Equipment & Medical Supplies · North Riverside, IL NPI 1982764759 Julie Sauer Occupational Therapy Assistant · North Riverside, IL NPI 1568630937 Smart Moves Pediatrics Developmental Disabilities Clinic/Center · North Riverside, IL NPI 1750552972 Rush Oak Park Physicians Group North Riverside Internal Medicine Physician · North Riverside, IL NPI 1003186255 Solutions for Care Case Management Agency · North Riverside, IL NPI 1184985053 Deborah Sitz Gerontology Registered Nurse · North Riverside, IL NPI 1942561725 Sarah Saenz Social Worker · N Riverside, IL NPI 1972857753
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-17.