Mark Ozog, MD
NPI 1124106786 · Ophthalmology Physician · Great Falls, MT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ozog, MD is a Ophthalmology Physician provider in Great Falls, MT (NPI 1124106786).
Provider details
- NPI number
- 1124106786
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 7816 (MT)
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
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
3,060 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 | 957 | $40 |
| Injection of Drug Into Eye67028 | 533 | $118 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 515 | $56 |
| Established Patient Complete Exam of Visual System92014 | 503 | $124 |
| Established Patient Problem Focused Exam of Visual System92012 | 177 | $88 |
| New Patient Complete Exam of Visual System92004 | 122 | $146 |
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 | 187 | 36 |
| Prednisolone Acetate | 103 | 63 |
| Diclofenac Sodium | 86 | 75 |
| Timolol Maleate | 48 | 11 |
| Erythromycin Basebrand: Erythromycin | 37 | 23 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 31 | — |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 27 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117 across 3 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
- 2006-11-01
- Last updated
- 2023-03-22
- Certified
- 2023-03-22
Frequently asked questions
- What is Mark Ozog's NPI number?
- Mark Ozog's National Provider Identifier (NPI) is 1124106786, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ozog's specialty?
- Mark Ozog is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ozog located?
- Mark Ozog's practice location on file with NPPES is 1417 9th St S Ste 100, Great Falls, MT 59405-4509.
- What is Mark Ozog's phone number?
- The practice phone number listed in the NPPES registry for Mark Ozog is (406) 453-1613.
- Does Mark Ozog accept Medicare?
- Mark Ozog is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ozog's NPI active?
- Yes — Mark Ozog's NPI (1124106786) is active in the NPPES registry as of the last update on 2023-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.