Mark Ihnen, M.D.
NPI 1770809212 · Ophthalmology Physician · Louisville, KY
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ihnen, M.D. is a Ophthalmology Physician provider in Louisville, KY (NPI 1770809212).
Provider details
- NPI number
- 1770809212
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 47513 (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
16 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
3,735 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,800 | $80 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 346 | $34 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 324 | $113 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 320 | $457 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 | 256 | $286 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 |
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 | 452 | 122 |
| Prednisolone Acetate | 181 | 118 |
| Diclofenac Sodium | 171 | 103 |
| Timolol Maleate | 162 | 51 |
| Moxifloxacin Hclbrand: Moxifloxacin | 156 | 103 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 37 | 13 |
| Lifitegrastbrand: Xiidra | 23 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$182 across 9 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
- 2010-04-08
- Last updated
- 2023-02-10
- Certified
- 2023-02-10
Frequently asked questions
- What is Mark Ihnen's NPI number?
- Mark Ihnen's National Provider Identifier (NPI) is 1770809212, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ihnen's specialty?
- Mark Ihnen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ihnen located?
- Mark Ihnen's practice location on file with NPPES is 1169 Eastern Pkwy, Louisville, KY 40217-1417.
- What is Mark Ihnen's phone number?
- The practice phone number listed in the NPPES registry for Mark Ihnen is (502) 896-8700.
- Does Mark Ihnen accept Medicare?
- Mark Ihnen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ihnen's NPI active?
- Yes — Mark Ihnen's NPI (1770809212) is active in the NPPES registry as of the last update on 2023-02-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.