Keith Mercer, M.D.
NPI 1568543049 · Ophthalmology Physician · Grass Valley, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Keith Mercer, M.D. is a Ophthalmology Physician provider in Grass Valley, CA (NPI 1568543049).
Provider details
- NPI number
- 1568543049
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G37695 (CA)
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
19 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
2,642 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 | 976 | $131 |
| Established Patient Problem Focused Exam of Visual System92012 | 752 | $93 |
| Imaging of Optic Nerve92133 | 376 | $37 |
| New Patient Complete Exam of Visual System92004 | 178 | $155 |
| Imaging of Retina92134 | 132 | $42 |
| Exam of Visual Field With Extended Testing92083 | 122 | $67 |
| New Patient Problem Focused Exam of Visual System92002 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 626 | 154 |
| Timolol Maleate | 106 | 36 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 62 | 19 |
| Prednisolone Acetate | 59 | 52 |
| Dorzolamide Hcl | 54 | 17 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 47 | 43 |
| Erythromycin Basebrand: Erythromycin | 40 | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$186 across 9 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
- 2006-10-18
- Last updated
- 2013-01-10
Frequently asked questions
- What is Keith Mercer's NPI number?
- Keith Mercer's National Provider Identifier (NPI) is 1568543049, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Keith Mercer's specialty?
- Keith Mercer is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Keith Mercer located?
- Keith Mercer's practice location on file with NPPES is 400 Sierra College Dr, Grass Valley, CA 95945-5089.
- What is Keith Mercer's phone number?
- The practice phone number listed in the NPPES registry for Keith Mercer is (530) 272-3411.
- Does Keith Mercer accept Medicare?
- Keith Mercer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Keith Mercer's NPI active?
- Yes — Keith Mercer's NPI (1568543049) is active in the NPPES registry as of the last update on 2013-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.