Christa L. Walling, O.D.
NPI 1306833421ActiveIndividual· Optometrist· Greenfield, IN
Optometrist (O.D.) with Hancock Eye Associates PC and 1 other group, practicing in Greenfield, Indiana. Their prescriptions cost Medicare Part D more than their services did: $702,091 for 734 claims, against $77,881 paid for services in 2024. Alcon Vision LLC was the largest of 9 companies reporting payments in 2025, $837.53 in all, mostly food and beverage.
Overview
| NPI | 1306833421 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Oct 4, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 18003127A | 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 | 442 |
|---|---|
| Services billed | 1,758 across 26 procedure codes |
| Paid by Medicare | $77,881 |
Part D prescriptions in 2024
| Prescriptions (claims) | 734 · 1,563 30-day fills |
|---|---|
| Patients | 249 |
| Total drug cost | $702,091 |
| Generic share | 64% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Optometry |
Medical groups
- Hancock Eye Associates PCGreenfield, IN · 4 clinicians
- McColley Eyecare Professional CorporationMcCordsville, IN · 4 clinicians
Industry payments (Open Payments)
- 2025$837.53 · 40 payments from 9 companies
- 2024$978.96 · 44 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $179.41 | 3 |
| Johnson & Johnson Vision Care, Inc. | $176.23 | 11 |
| Tarsus Pharmaceuticals, Inc. | $150.10 | 11 |
| Oyster Point Pharma, Inc. | $95.99 | 4 |
| Sun Pharmaceutical Industries Inc. | $72.93 | 3 |
What the 2025 payments were for
- Food and Beverage$837.53 · 40 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 18 optometrists in Greenfield · All optometrists in Indiana