Mark Cassol, M.D.
NPI 1023128063 · Ophthalmology Physician · Louisville, KY
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Cassol, M.D. is a Ophthalmology Physician provider in Louisville, KY (NPI 1023128063).
Provider details
- NPI number
- 1023128063
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 39515 (KY)
Specialties & taxonomies
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
911 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) |
|---|---|---|
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 249 | $418 |
| Established Patient Problem Focused Exam of Visual System92012 | 194 | $78 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 159 | $41 |
| New Patient Complete Exam of Visual System92004 | 154 | $129 |
| Established Patient Complete Exam of Visual System92014 | 69 | $109 |
| Imaging of Retina92134 | 35 | $35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 70 | 18 |
| Prednisolone Acetate | 31 | 26 |
| Brimonidine Tartrate | 23 | 12 |
| Acyclovir | 15 | — |
| Cyclosporinebrand: Restasis | 14 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$681 across 11 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
- 2006-08-30
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Cassol's NPI number?
- Mark Cassol's National Provider Identifier (NPI) is 1023128063, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Cassol's specialty?
- Mark Cassol is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Cassol located?
- Mark Cassol's practice location on file with NPPES is 800 Zorn Ave, Louisville, KY 40206-1433.
- What is Mark Cassol's phone number?
- The practice phone number listed in the NPPES registry for Mark Cassol is (502) 287-4000.
- Does Mark Cassol accept Medicare?
- Mark Cassol is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Cassol's NPI active?
- Yes — Mark Cassol's NPI (1023128063) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.