Clear Lake Optics Corp
NPI 1679767339 · Optometrist · Mason City, IA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clear Lake Optics Corp is a Optometrist organization in Mason City, IA (NPI 1679767339).
Provider details
- NPI number
- 1679767339
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Mike Korthals, Owner(641) 424-0780
- License
- 02146 (IA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
Mailing address
Other names (DBA / former)
- Doing business as
- Michael L Korthals
- Doing business as
- Michael L Korthals
Registry dates
- Enumerated
- 2007-09-05
- Last updated
- 2023-12-14
- Certified
- 2023-12-14
Frequently asked questions
- What is Clear Lake Optics Corp's NPI number?
- Clear Lake Optics Corp's National Provider Identifier (NPI) is 1679767339, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Clear Lake Optics Corp?
- Clear Lake Optics Corp is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Clear Lake Optics Corp located?
- Clear Lake Optics Corp's practice location on file with NPPES is 422 S Pierce Ave Ste 100a, Mason City, IA 50401-2709.
- What is Clear Lake Optics Corp's phone number?
- The practice phone number listed in the NPPES registry for Clear Lake Optics Corp is (641) 424-0780.
- Does Clear Lake Optics Corp accept Medicare?
- Clear Lake Optics Corp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Clear Lake Optics Corp?
- The authorized official listed on Clear Lake Optics Corp's NPPES record is Mike Korthals, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Clear Lake Optics Corp's NPI active?
- Yes — Clear Lake Optics Corp's NPI (1679767339) is active in the NPPES registry as of the last update on 2023-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.