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Harold Zwick, OD
NPI 1336145879 · Optometrist · Whitehall, WI
Harold Zwick, OD is a Optometrist provider in Whitehall, WI (NPI 1336145879).
Provider details
- NPI number
- 1336145879
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 1610 (WI)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
18606 Ervin St
Whitehall, WI 54773-8613
Phone: (715) 538-4330
Street-level locationGet directions
Mailing address
1836 South Ave
La Crosse, WI 54601-5429
Registry dates
- Enumerated
- 2005-06-21
- Last updated
- 2016-02-01
Frequently asked questions
- What is Harold Zwick's NPI number?
- Harold Zwick's National Provider Identifier (NPI) is 1336145879, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Zwick's specialty?
- Harold Zwick is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Harold Zwick located?
- Harold Zwick's practice location on file with NPPES is 18606 Ervin St, Whitehall, WI 54773-8613.
- What is Harold Zwick's phone number?
- The practice phone number listed in the NPPES registry for Harold Zwick is (715) 538-4330.
- Is Harold Zwick's NPI active?
- Yes — Harold Zwick's NPI (1336145879) is active in the NPPES registry as of the last update on 2016-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.