Jon Williamson, OD
NPI 1932104114 · Optometrist · Sparta, WI
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jon Williamson, OD is a Optometrist provider in Sparta, WI (NPI 1932104114).
Provider details
- NPI number
- 1932104114
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 2115 (WI)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
21 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
3,003 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 2,574 | $1 |
| Established Patient Complete Exam of Visual System92014 | 277 | $119 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $85 |
| New Patient Complete Exam of Visual System92004 | 40 | $142 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 15 | $15 |
| Imaging of Optic Nerve92133 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 178 | 36 |
| Timolol Maleate | 80 | 19 |
| Brimonidine Tartrate | 34 | — |
| Cyclosporine | 28 | — |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 25 | 17 |
| Prednisolone Acetate | 21 | 19 |
| Ofloxacin | 18 | 12 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-15
- Last updated
- 2022-07-21
Frequently asked questions
- What is Jon Williamson's NPI number?
- Jon Williamson's National Provider Identifier (NPI) is 1932104114, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jon Williamson's specialty?
- Jon Williamson is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Jon Williamson located?
- Jon Williamson's practice location on file with NPPES is 1111 W Wisconsin St, Sparta, WI 54656-2233.
- What is Jon Williamson's phone number?
- The practice phone number listed in the NPPES registry for Jon Williamson is (608) 269-6731.
- Does Jon Williamson accept Medicare?
- Jon Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jon Williamson's NPI active?
- Yes — Jon Williamson's NPI (1932104114) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.