Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Stephen G Cook, MD
Specialist in Springfield, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1043268386
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Registry record
Entity type Individual (Type 1)
Name Dr. Stephen G Cook
Credential MD
Sex Male
Practice address 2020 W Iles Ave, Springfield, IL, 62704
Phone (217) 698-3030
Fax (217) 698-3068
Enumeration date May 5, 2006
Last updated in NPPES Jul 9, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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
What specialty is Stephen Cook?
Stephen Cook is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Robert Blumthal Optometrist · Springfield, IL NPI 1578568077 Prairie Eye Center, Ltd Ophthalmology Physician · Springfield, IL NPI 1447222864 Jennifer Waller Optometrist · Springfield, IL NPI 1861440612 Sandra Yeh Ophthalmology Physician · Springfield, IL NPI 1841248838 Harvey Mack Optometrist · Springfield, IL NPI 1386692630 Mary Morrisey Specialist · Springfield, IL NPI 1114975414 Stuart Farris Ophthalmology Physician · Springfield, IL NPI 1144279498 Joseph Sabetti Optometrist · Springfield, IL NPI 1316997182
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.