Walter Nieves, MD
NPI 1225007453 · Ophthalmology Physician · Isabela, PR
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Nieves, MD is a Ophthalmology Physician provider in Isabela, PR (NPI 1225007453).
Provider details
- NPI number
- 1225007453
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 12791 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Eyewear Supplier332H00000X
Suppliers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
25 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) |
|---|---|---|
| Established Patient Problem Focused Exam of Visual System92012 | 25 | $88 |
Typical Medicare-allowed amounts for these services range $88–$88 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 1,673 | 244 |
| Levobunolol Hcl | 331 | 74 |
| Prednisolone Acetate | 270 | 135 |
| Brimonidine Tartrate | 120 | 28 |
| Brimonidine Tartrate/Timololbrand: Brimonidine Tartrate-Timolol | 85 | 12 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 75 | 21 |
| Dorzolamide Hcl | 60 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-17
- Last updated
- 2026-03-10
- Certified
- 2026-03-10
Frequently asked questions
- What is Walter Nieves's NPI number?
- Walter Nieves's National Provider Identifier (NPI) is 1225007453, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Nieves's specialty?
- Walter Nieves is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Nieves located?
- Walter Nieves's practice location on file with NPPES is 3285 Ave Militar, Isabela, PR 00662-4091.
- What is Walter Nieves's phone number?
- The practice phone number listed in the NPPES registry for Walter Nieves is (787) 830-5784.
- Does Walter Nieves accept Medicare?
- Walter Nieves is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Nieves's NPI active?
- Yes — Walter Nieves's NPI (1225007453) is active in the NPPES registry as of the last update on 2026-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.