Benjamin Mason, M.D..
NPI 1457301442 · Ophthalmology Physician · Waterloo, IA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Benjamin Mason, M.D.. is a Ophthalmology Physician provider in Waterloo, IA (NPI 1457301442).
Provider details
- NPI number
- 1457301442
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D..
- Sex
- Male
- Sole proprietor
- No
- License
- 36579 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
6,287 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) |
|---|---|---|
| Measurement of Corneal Curvature and Depth of Eye92136 | 1,204 | $24 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 1,104 | $219 |
| Established Patient Complete Exam of Visual System92014 | 800 | $116 |
| Imaging of Optic Nerve92133 | 597 | $31 |
| Exam of Visual Field With Extended Testing92083 | 502 | $58 |
| New Patient Complete Exam of Visual System92004 | 467 | $138 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 2,117 | 399 |
| Timolol Maleate | 804 | 215 |
| Brimonidine Tartrate | 599 | 154 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 557 | 127 |
| Dorzolamide Hcl | 474 | 116 |
| Prednisolone Acetate | 366 | 225 |
| Bimatoprostbrand: Lumigan | 360 | 75 |
| Moxifloxacin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$32 across 1 record (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
- 2006-05-11
- Last updated
- 2018-02-15
Frequently asked questions
- What is Benjamin Mason's NPI number?
- Benjamin Mason's National Provider Identifier (NPI) is 1457301442, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Benjamin Mason's specialty?
- Benjamin Mason is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Benjamin Mason located?
- Benjamin Mason's practice location on file with NPPES is 999 Home Plz, Waterloo, IA 50701-4822.
- What is Benjamin Mason's phone number?
- The practice phone number listed in the NPPES registry for Benjamin Mason is (319) 287-5890.
- Does Benjamin Mason accept Medicare?
- Benjamin Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Benjamin Mason's NPI active?
- Yes — Benjamin Mason's NPI (1457301442) is active in the NPPES registry as of the last update on 2018-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.