William Farmer, MD
NPI 1902840861 · Ophthalmology Physician · Oxford, MS
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Farmer, MD is a Ophthalmology Physician provider in Oxford, MS (NPI 1902840861).
Provider details
- NPI number
- 1902840861
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 15523 (MS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,470 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 1,384 | $111 |
| Exam of Visual Field With Extended Testing92083 | 402 | $55 |
| Imaging of Optic Nerve92133 | 365 | $31 |
| Imaging of Retina92134 | 339 | $35 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 | 318 | $244 |
| Photography of the Retina92250 | 247 | $30 |
| Established Patient Problem Focused Exam of Visual System92012 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 543 | 136 |
| Timolol Maleate | 220 | 77 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 200 | 60 |
| Erythromycin Basebrand: Erythromycin | 146 | 91 |
| Brimonidine Tartrate | 136 | 47 |
| Bimatoprostbrand: Lumigan | 82 | 25 |
| Dorzolamide Hcl | 43 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$703 across 32 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
- 2006-06-15
- Last updated
- 2022-11-25
- Certified
- 2022-11-17
Frequently asked questions
- What is William Farmer's NPI number?
- William Farmer's National Provider Identifier (NPI) is 1902840861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Farmer's specialty?
- William Farmer is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is William Farmer located?
- William Farmer's practice location on file with NPPES is 2606 S. Lamar, Oxford, MS 38655-5302.
- What is William Farmer's phone number?
- The practice phone number listed in the NPPES registry for William Farmer is (662) 234-6551.
- Does William Farmer accept Medicare?
- William Farmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Farmer's NPI active?
- Yes — William Farmer's NPI (1902840861) is active in the NPPES registry as of the last update on 2022-11-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.