Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dean R Streff, OD
Optometrist in Lancaster, OH · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154457109
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Registry record
Entity type Individual (Type 1)
Name Dean R Streff
Credential OD
Sex Male
Practice address 1516 W Fair Ave, Lancaster, OH, 43130
Phone (740) 687-6333
Fax (740) 687-0155
Enumeration date Feb 26, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0633738 | Medicaid | OH | - |
| 34153635900 | Other | OH | BWC |
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 1154457109 active?
Yes, as of the latest NPPES snapshot, NPI 1154457109 is active (record last updated 2007-07-08).
How do I verify Dean Streff's NPI record?
Cross-check NPI 1154457109 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.