Mark Cassol, M.D.
Ophthalmology Physician · Louisville, KY
Mark Cassol, M.D. is an ophthalmology physician with a practice address in Louisville, Kentucky, and NPI 1023128063, issued on Aug 30, 2006. Check the license (Kentucky 39515, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Mark Cassol
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 39515 KY
Self-reported in NPPES; status is on the state search - Practice location
- 800 Zorn Ave, Louisville, KY 40206
- Phone
- (502) 287-4000
- Enumerated
- Aug 30, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090501000177); accepts Medicare assignment
- Medical or professional school
- West Virginia University School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 239 in Kentucky → Look up another NPI →
Also registered at 800 Zorn Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stacy Adams, R.D.Registered Dietitian1801999172
- Erica AdkinsClinical Social Worker1629324348
- Alicia Agana, PSY.D., ABPPMental Health Counselor1386078806
- Brian Alexander, L.C.S.W.Clinical Social Worker1912959693
- Patrick Alexander, LCSWClinical Social Worker1619431590
- Barbara Allison, RDRegistered Dietitian1962517383
Verify Mark Cassol in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 39515Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average ophthalmology physician in 2024
193 Medicare Part D claims for 78 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Latanoprost70 claims
- Prednisolone Acetate31 claims
- Brimonidine Tartrate23 claims
- Acyclovir15 claims
- Restasis14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 29.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $680.94
11 payments; by number, the most common kind was food and beverage; the largest payer was Johnson & Johnson Surgical Vision, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark Cassol among 239 ophthalmology physician records in Kentucky
Mark Cassol, M.D. is one of 239 ophthalmology physician records with a practice address in Kentucky. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 26% of them.
- NPI issued2006 · 26% of these records are older, 45% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2001 · median 2001 among the 157 with a school on file
- Record last updated2007 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Kentucky
There are 239 ophthalmology physician records in Kentucky.
All 239 in Kentucky → Every provider in Louisville → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Brennan Greene, MDLouisville, KY 402061013003136
- John Meyer, MDLouisville, KY 402061588750681
- Sean Murphy, MDLouisville, KY 402061407942519
- Catherine Newton, MDLouisville, KY 402061871667154
- Guruprasad Pattar, M.D.Louisville, KY 402061689963589
- Leila VagheiLouisville, KY 402061790896736
- Susan Berberich, MDLouisville, KY 402051891789749
- Joseph Brightwell, MDLouisville, KY 402051255325031
Common questions
What is Mark Cassol, M.D.'s NPI number?
Mark Cassol, M.D.'s National Provider Identifier (NPI) is 1023128063, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Cassol, M.D. located?
The NPPES record lists a practice address at 800 Zorn Ave, Louisville, KY, 40206. Phone: (502) 287-4000. Providers update this record themselves, so call before visiting.
How can I verify Mark Cassol, M.D.'s license?
NPPES lists Kentucky license number 39515, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Cassol, M.D. prescribe under Medicare Part D?
In 2024, Mark Cassol, M.D. had 193 Medicare Part D claims for 78 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Mark Cassol, M.D.'s MIPS final score?
The 2023 MIPS final score is 29.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.