Derek Williams, OD
NPI 1942793294 · Optometrist · Saginaw, MI
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derek Williams, OD is a Optometrist provider in Saginaw, MI (NPI 1942793294).
Provider details
- NPI number
- 1942793294
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 4901005110 (MI)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
8 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 154 | 44 |
| Netarsudil Mesylat/Latanoprostbrand: Rocklatan | 131 | 23 |
| Lifitegrastbrand: Xiidra | 106 | 22 |
| Cyclosporinebrand: Restasis | 70 | 28 |
| Brimonidine Tartrate | 23 | — |
| Loteprednol Etabonatebrand: Eysuvis | 16 | 13 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$305 across 11 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-06-12
- Last updated
- 2021-04-12
- Certified
- 2021-04-12
Frequently asked questions
- What is Derek Williams's NPI number?
- Derek Williams's National Provider Identifier (NPI) is 1942793294, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derek Williams's specialty?
- Derek Williams is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Derek Williams located?
- Derek Williams's practice location on file with NPPES is 1522 Janes Ave, Saginaw, MI 48601-1819.
- What is Derek Williams's phone number?
- The practice phone number listed in the NPPES registry for Derek Williams is (989) 907-2790.
- Does Derek Williams accept Medicare?
- Derek Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derek Williams's NPI active?
- Yes — Derek Williams's NPI (1942793294) is active in the NPPES registry as of the last update on 2021-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.