Carl Harder, O.D.
NPI 1558635748 · Optometrist · Louisville, KY
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carl Harder, O.D. is a Optometrist provider in Louisville, KY (NPI 1558635748).
Provider details
- NPI number
- 1558635748
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 18003712A (IN)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 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
197 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 | 126 | $84 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 | 27 | $290 |
| Imaging of Optic Nerve92133 | 18 | $30 |
| Exam of Visual Field With Extended Testing92083 | 14 | $57 |
| Imaging of Retina92134 | 12 | $37 |
Typical Medicare-allowed amounts for these services range $30–$290 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 98 | 25 |
| Brimonidine Tartrate | 61 | 15 |
| Timolol Maleate | 41 | 11 |
| Prednisolone Acetate | 37 | 31 |
| Brimonidine Tartrate/Timololbrand: Combigan | 14 | — |
| Cyclosporinebrand: Restasis | 14 | — |
| Erythromycin Basebrand: Erythromycin | 13 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$424 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
- 2012-03-06
- Last updated
- 2013-09-26
Frequently asked questions
- What is Carl Harder's NPI number?
- Carl Harder's National Provider Identifier (NPI) is 1558635748, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Harder's specialty?
- Carl Harder is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Carl Harder located?
- Carl Harder's practice location on file with NPPES is 6420 Dutchmans Pkwy, Louisville, KY 40205-3372.
- What is Carl Harder's phone number?
- The practice phone number listed in the NPPES registry for Carl Harder is (502) 259-5026.
- Does Carl Harder accept Medicare?
- Carl Harder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carl Harder's NPI active?
- Yes — Carl Harder's NPI (1558635748) is active in the NPPES registry as of the last update on 2013-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.