Mark Gill Kosko, M.D.
Ophthalmology Physician · Madison, MS
Mark Gill Kosko, M.D. is an ophthalmology physician with a practice address in Madison, Mississippi, and NPI 1447578752, issued on May 11, 2010. Check the license (Mississippi 23717, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Mark Gill Kosko
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 23717 MS
MD.33192 AL
Self-reported in NPPES; status is on the state search - Practice location
- 1026 Baptist Cir Ste 100, Madison, MS 39110
- Phone
- (601) 353-2020
- Enumerated
- May 11, 2010
- Record last updated
- May 15, 2026
- Fax
- (601) 714-5110
- Medicaid ID
- 05508385 MS
- Medicare enrollment
- Enrolled (PECOS I20150513000062); accepts Medicare assignment
- Medical or professional school
- University Of Mississippi School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 165 in Mississippi → Look up another NPI →
Also registered at 1026 Baptist Cir Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denise Phillips, MDOphthalmology Physician1518935428
- Alexander Whittington, M.D.Ophthalmology Physician1003170036
Verify Mark Gill Kosko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 23717Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.5 times the Medicare Part D claims of the average ophthalmology physician in 2024
5,338 Medicare Part D claims for 851 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Latanoprost1,476 claims
- Dorzolamide-Timolol1,023 claims
- Prednisolone Acetate553 claims
- Brimonidine Tartrate499 claims
- Timolol Maleate292 claims
- Ofloxacin275 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 practice group's MIPS final score for 2023 (Medicare payment program): 68.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $712.08
26 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. 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.
Bills Medicare through one group practice
- Jackson Eye Associates PLLCMadison, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Gill Kosko among 165 ophthalmology physician records in Mississippi
Mark Gill Kosko, M.D. is one of 165 ophthalmology physician records with a practice address in Mississippi. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 75% of them.
- NPI issued2010 · 75% of these records are older, 24% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2010 · median 2001 among the 97 with a school on file
- Record last updated2026 · 63% 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 Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 ophthalmology physician records list a practice address in Madison
They are 8 of the 612 NPPES records with a practice address in Madison, and 165 ophthalmology physician records in Mississippi.
All 165 in Mississippi → Every provider in Madison → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- William Ashford, M.D.Madison, MS 391101588692636
- Robert Browning, MDMadison, MS 391101053809566
- Kevin Kosek, M. D.Madison, MS 391101356551691
- Elizabeth Mitchell, M.D.Madison, MS 391101962430074
- Denise Phillips, MDMadison, MS 391101518935428
- Philip Smith, M.D.Madison, MS 391101942206149
- Alexander Whittington, M.D.Madison, MS 391101003170036
- Patrick Duffy, MDNatchez, MS 391201588650329
Common questions
What is Mark Gill Kosko, M.D.'s NPI number?
Mark Gill Kosko, M.D.'s National Provider Identifier (NPI) is 1447578752, issued on May 11, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gill Kosko, M.D. located?
The NPPES record lists a practice address at 1026 Baptist Cir Ste 100, Madison, MS, 39110. Phone: (601) 353-2020. Providers update this record themselves, so call before visiting.
How can I verify Mark Gill Kosko, M.D.'s license?
NPPES lists Mississippi license number 23717, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Gill Kosko, M.D. prescribe under Medicare Part D?
In 2024, Mark Gill Kosko, M.D. had 5,338 Medicare Part D claims for 851 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Mark Gill Kosko, M.D.'s MIPS final score?
The 2023 MIPS final score is 68.8 of 100, reported for the practice group. 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.