Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Harold F Zwick Jr., OD
Optometrist in Whitehall, WI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336145879
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Registry record
Entity type Individual (Type 1)
Name Harold F Zwick Jr.
Credential OD
Sex Male
Practice address 18606 Ervin St, Whitehall, WI, 54773
Phone (715) 538-4330
Enumeration date Jun 21, 2005
Last updated in NPPES Feb 1, 2016
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 |
|---|---|---|---|
| 38507300 | 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
Where does Harold Zwick practice?
The practice location on file with NPPES is in Whitehall, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Harold Zwick?
The National Provider Identifier (NPI) for Harold Zwick is 1336145879, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Mark Zellmer Medical Physician Assistant · Whitehall, WI NPI 1023013364 Jeffery Herried Physician Assistant · Whitehall, WI NPI 1316942865 Gundersen Clinic, Ltd. Clinic/Center · Whitehall, WI NPI 1609828151 Gundersen Clinic, Ltd. Optometrist · Whitehall, WI NPI 1215976352 Jodene Ekker Adult Health Nurse Practitioner · Whitehall, WI NPI 1801033527 Kimberly Breidenbach Family Medicine Physician · Whitehall, WI NPI 1972893071 Megan Klomps-Mcclung Family Medicine Physician · Whitehall, WI NPI 1255614681 Tri-County Memorial Hospital, Inc. Rural Health Clinic/Center · Whitehall, WI NPI 1417201864
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-01.