Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mathew Bryan Mergenthaler, O.D.
Optometrist in Medford, WI · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1568874907
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Registry record
Entity type Individual (Type 1)
Name Dr. Mathew Bryan Mergenthaler
Credential O.D.
Sex Male
Practice address 671 S Gibson St, Medford, WI, 54451
Phone (608) 790-5851
Enumeration date May 20, 2014
Last updated in NPPES Jan 7, 2026
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 |
|---|---|---|---|
| 100039841 | Medicaid | WI | - |
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 1568874907 active?
Yes, as of the latest NPPES snapshot, NPI 1568874907 is active (record last updated 2026-01-07).
How do I verify Mathew Mergenthaler's NPI record?
Cross-check NPI 1568874907 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 2026-01-07.