Gary Belen, M.D.
NPI 1841274933 · Specialist · Denver, CO
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Belen, M.D. is a Specialist provider in Denver, CO (NPI 1841274933).
Provider details
- NPI number
- 1841274933
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 40364 (CO)
Specialties & taxonomies
Other Service Providers
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
1,345 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 Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 376 | $124 |
| Imaging of Optic Nerve92133 | 218 | $33 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 200 | $26 |
| Exam of Visual Field With Extended Testing92083 | 174 | $60 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 167 | $446 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 68 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 722 | 181 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 279 | 74 |
| Prednisolone Acetate | 252 | 199 |
| Moxifloxacin Hclbrand: Moxifloxacin | 177 | 134 |
| Timolol Maleate | 148 | 52 |
| Brimonidine Tartrate | 122 | 44 |
| Travoprost | 51 | 20 |
| Dorzolamide Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$198 across 6 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
- 2005-12-01
- Last updated
- 2012-09-10
Frequently asked questions
- What is Gary Belen's NPI number?
- Gary Belen's National Provider Identifier (NPI) is 1841274933, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Belen's specialty?
- Gary Belen is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Gary Belen located?
- Gary Belen's practice location on file with NPPES is 55 Madison St, Denver, CO 80206-5419.
- What is Gary Belen's phone number?
- The practice phone number listed in the NPPES registry for Gary Belen is (303) 398-7320.
- Does Gary Belen accept Medicare?
- Gary Belen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Belen's NPI active?
- Yes — Gary Belen's NPI (1841274933) is active in the NPPES registry as of the last update on 2012-09-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.