Martin Williamson, OD
NPI 1740778646 · Optometrist · La Crosse, WI
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martin Williamson, OD is a Optometrist provider in La Crosse, WI (NPI 1740778646).
Provider details
- NPI number
- 1740778646
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 3509 (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
8 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
4,189 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 | 3,558 | $1 |
| Established Patient Complete Exam of Visual System92014 | 254 | $119 |
| 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 | 106 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 69 | $85 |
| New Patient Complete Exam of Visual System92004 | 57 | $142 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 104 | 27 |
| Prednisolone Acetate | 46 | 38 |
| Timolol Maleate | 25 | 11 |
| Doxycycline Monohydrate | 16 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 14 | — |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 13 | 12 |
| Brimonidine Tartrate | 11 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-04-25
- Last updated
- 2018-08-31
Frequently asked questions
- What is Martin Williamson's NPI number?
- Martin Williamson's National Provider Identifier (NPI) is 1740778646, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Williamson's specialty?
- Martin Williamson is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Martin Williamson located?
- Martin Williamson's practice location on file with NPPES is 1836 South Ave, La Crosse, WI 54601.
- What is Martin Williamson's phone number?
- The practice phone number listed in the NPPES registry for Martin Williamson is (608) 782-7300.
- Does Martin Williamson accept Medicare?
- Martin Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martin Williamson's NPI active?
- Yes — Martin Williamson's NPI (1740778646) is active in the NPPES registry as of the last update on 2018-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.