Mark Aaron Ihnen, M.D.
Ophthalmology Physician · Louisville, KY
Mark Aaron Ihnen, M.D. is an ophthalmology physician with a practice address in Louisville, Kentucky, and NPI 1770809212, issued on Apr 8, 2010. Check the license (Kentucky 47513, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Mark Aaron Ihnen
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 47513 KY
Self-reported in NPPES; status is on the state search - Practice location
- 1169 Eastern Pkwy, Louisville, KY 40217
- Phone
- (502) 896-8700
- Enumerated
- Apr 8, 2010
- Record last updated
- Feb 10, 2023
- Fax
- (502) 896-0813
- Medicaid ID
- 7100191130 KY
- Medicare enrollment
- Enrolled (PECOS I20140806000652); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 239 in Kentucky → Look up another NPI →
Also registered at 1169 Eastern Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashley AbramsBehavior Technician1962907519
- Sharifo AbukarBehavior Technician1538970264
- Catherine Aponte, PSY.D,Psychologist1346503216
- James BeamsHearing Instrument Specialist1457811721
- Myrna Boland, PSY.D.Clinical Psychologist1235101635
- Urban Boland, LCSWClinical Social Worker1568488377
Verify Mark Aaron Ihnen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 47513Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,372 Medicare Part D claims for 349 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims.
Most prescribed
- Latanoprost452 claims
- Prednisolone Acetate181 claims
- Diclofenac Sodium171 claims
- Timolol Maleate162 claims
- Moxifloxacin156 claims
- Dorzolamide-Timolol37 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): 88 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: $182.26
9 payments; by number, the most common kind was food and beverage; the largest payer was Oyster Point Pharma, 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.
Bills Medicare through one group practice
- Kentucky Eye Care PscLouisville, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Aaron Ihnen among 239 ophthalmology physician records in Kentucky
Mark Aaron Ihnen, 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 2010, is newer than 69% of them.
- NPI issued2010 · 69% of these records are older, 26% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2010 · median 2001 among the 157 with a school on file
- Record last updated2023 · 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
- Anupa Mandava, M.D.Louisville, KY 402171710257316
- Norman Radtke, M.D.Louisville, KY 402171073514717
- Gregory Sulkowski, M.D.Louisville, KY 402171811102080
- Lloyd Taustine, MDLouisville, KY 402171437151099
- Theodore Wandzilak, MDLouisville, KY 402171013909753
- Janelle Adeniran, M.D.Louisville, KY 402151497017867
- Donald Bennett, OD MDLouisville, KY 402151013991165
- Steven Bloom, MDLouisville, KY 402151346224409
Common questions
What is Mark Aaron Ihnen, M.D.'s NPI number?
Mark Aaron Ihnen, M.D.'s National Provider Identifier (NPI) is 1770809212, issued on Apr 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mark Aaron Ihnen, M.D. located?
The NPPES record lists a practice address at 1169 Eastern Pkwy, Louisville, KY, 40217. Phone: (502) 896-8700. Providers update this record themselves, so call before visiting.
How can I verify Mark Aaron Ihnen, M.D.'s license?
NPPES lists Kentucky license number 47513, 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 Aaron Ihnen, M.D. prescribe under Medicare Part D?
In 2024, Mark Aaron Ihnen, M.D. had 1,372 Medicare Part D claims for 349 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Mark Aaron Ihnen, M.D.'s MIPS final score?
The 2023 MIPS final score is 88 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.