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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

RONALD DEMARK O.D.
NPI 1346294741
Optometrist in Manitowoc, WI

Active since May 20, 2006
3415 CALUMET AVE, MANITOWOC, WI 54220(920) 683-2244(920) 684-7706 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ronald Demark O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RONALD DEMARK O.D. (NPI 1346294741) is an individual optometrist in Manitowoc, Wisconsin, licensed in Wisconsin (1403) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1346294741
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameRONALD DEMARKCredential: O.D.
Location Address3415 CALUMET AVEManitowoc, WI 54220-5427
Mailing Address3415 Calumet AveManitowoc, WI 54220-5427 · (920) 683-2244 · Fax (920) 684-7706
Phone(920) 683-2244
Fax(920) 684-7706
Sole ProprietorNo
Enumeration DateMay 20, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1346294741 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in WI · 1403
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
3415 CALUMET AVE, Manitowoc, WI 54220
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Other Identifiers 1

Medicaid38513200WI

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. DONALD JAMES DOMRATH O.D.
Optometrist
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 683-2244
SHOPKO STORES OPERATING CO. LLC
Eyewear Supplier
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 683-2244
MR. PAUL ROBERT GRAY
Pharmacist
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 684-0251
DR. BRIAN F COOK O.D.
Optometrist
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 683-2244
MRS. SHERI L MCGLONE BC HIS
Hearing Instrument Specialist
3415 CALUMET AVE, EXELA HEARING SERVICES
MANITOWOC, WI 54220
Manitowoc County (920) 652-0190
MS. DEBRA ANN ST.PIERRE RPH
Pharmacist
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 684-0251
JEFFREY PRITZL
Pharmacist
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 684-0251
MS. MELISSA A KLEIN PHD
Pharmacist
3415 CALUMET AVE
MANITOWOC, WI 54220
Manitowoc County (920) 684-0253

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ronald Demark's NPI number?

The NPI number for Ronald Demark is 1346294741. It was assigned to this individual provider in the NPPES registry on May 20, 2006.

Where is Ronald Demark located?

Ronald Demark practices at 3415 Calumet Ave, Manitowoc, WI 54220. The listed phone number is (920) 683-2244.

What is Ronald Demark's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

When was this NPI record last updated?

The NPPES record for Ronald Demark was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.