Iain Decker, DO
NPI 1740718410 · Ophthalmology Physician · Beloit, WI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Iain Decker, DO is a Ophthalmology Physician provider in Beloit, WI (NPI 1740718410).
Provider details
- NPI number
- 1740718410
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 036-157241 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,048 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) |
|---|---|---|
| Imaging of Retina92134 | 364 | $23 |
| Established Patient Complete Exam of Visual System92014 | 224 | $71 |
| Injection of Drug Into Eye67028 | 218 | $89 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 216 | $33 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 203 | $61 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 139 |
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 | 320 | 72 |
| Prednisolone Acetate | 261 | 170 |
| Ketorolac Tromethamine | 219 | 150 |
| Ofloxacin | 203 | 154 |
| Timolol Maleate | 139 | 57 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 106 | 29 |
| Brimonidine Tartrate | 63 | 14 |
| Neomycin/Polymyxin B/Dexametha |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$223 across 8 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
Additional practice locations (1)
- 5477 W Clark RdYpsilanti, MI 48197-1102Phone: (734) 434-6000
Registry dates
- Enumerated
- 2017-05-25
- Last updated
- 2025-03-12
- Certified
- 2025-03-12
Frequently asked questions
- What is Iain Decker's NPI number?
- Iain Decker's National Provider Identifier (NPI) is 1740718410, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Iain Decker's specialty?
- Iain Decker is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Iain Decker located?
- Iain Decker's practice location on file with NPPES is Beloit Clinic, Beloit, WI 53511-1842.
- What is Iain Decker's phone number?
- The practice phone number listed in the NPPES registry for Iain Decker is (608) 364-2293.
- Does Iain Decker accept Medicare?
- Iain Decker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Iain Decker's NPI active?
- Yes — Iain Decker's NPI (1740718410) is active in the NPPES registry as of the last update on 2025-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.