Mark Allan Walker Jr., O.D.
NPI 1972731461ActiveIndividual· Optometrist· Elkhart, IN
Optometrist (O.D.) in Elkhart, Indiana, trained at Indiana University - School of Optometry (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $221,166 for 1,212 claims, against $106,514 paid for services in 2024. Amgen Inc. was the largest of 9 companies reporting payments in 2025, $708.32 in all, mostly food and beverage.
Overview
| NPI | 1972731461 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Jun 23, 2009 |
| Last updated in NPPES | Nov 8, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 18003605A | IN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Optometry (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 750 |
|---|---|
| Services billed | 2,143 across 17 procedure codes |
| Paid by Medicare | $106,514 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,212 · 2,587 30-day fills |
|---|---|
| Patients | 315 |
| Total drug cost | $221,166 |
| Generic share | 63% of claims |
Education and affiliations
| Medical school | Indiana University - School of Optometry |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Optometry |
Medical group
- Boling Vision Center LLCElkhart, IN · 12 clinicians
Industry payments (Open Payments)
- 2025$708.32 · 18 payments from 9 companies
- 2024$531.88 · 12 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $194.94 | 4 |
| Mallinckrodt Hospital Products Inc. | $173.19 | 2 |
| Glaukos Corporation | $142.97 | 3 |
| Dompe US, Inc. | $81.44 | 3 |
| Alcon Vision LLC | $48.78 | 2 |
What the 2025 payments were for
- Food and Beverage$708.32 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 31 optometrists in Elkhart · All optometrists in Indiana