Dr. John E Witkowski, O.D.
Dr. John E Witkowski is a Optometrist provider (Optometrist) practicing in Naples, FL, registered in the NPPES registry with NPI 1821037409 since 2006. The credential OD stands for Doctor of Optometry.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1821037409 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John E Witkowski |
| Credential | O.D. |
| Sex | Male |
| Practice address | Naples, FL, 34119 |
| Phone | 2392624662 |
| Enumeration date | 2006-06-06 |
| Last updated in NPPES | 2021-03-01 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 152W00000X | Optometrist | Primary | OPC002142 | FL |
OD — Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential
Copy-ready billing details
Provider: John Witkowski, O.D. NPI: 1821037409 Taxonomy: 152W00000X (Optometrist) Address: Naples, FL, 34119
Verify this record
Cross-check NPI 1821037409 against the authoritative CMS record: view Dr. John E Witkowski on the official NPPES registry .
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. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-03-01.