Alexandra G. Castillejos Ellenthal, MD
NPI 1144780933ActiveIndividual· Ophthalmology· Chula Vista, CA
Ophthalmology (MD) with Castillejos Eye Institute Medical Group, practicing in Chula Vista, California. Their prescriptions cost Medicare Part D more than their services did: $340,760 for 4,021 claims, against $46,431 paid for services in 2024. Abbvie Inc. was the largest of 5 companies reporting payments in 2025, $444.14 in all, mostly food and beverage. Lists Scripps Mercy Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1144780933 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 20, 2019 |
| Last updated in NPPES | Feb 19, 2026 |
| Certified by provider | Feb 19, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A201789 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (CA); Practitioner - Ophthalmology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 251 |
|---|---|
| Services billed | 640 across 35 procedure codes |
| Paid by Medicare | $46,431 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,021 · 7,944 30-day fills |
|---|---|
| Patients | 1,221 |
| Total drug cost | $340,760 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Ophthalmology |
Medical group
- Castillejos Eye Institute Medical GroupChula Vista, CA · 6 clinicians
Hospital affiliations
- Scripps Mercy HospitalSan Diego, CA
- Sharp Chula Vista Medical CenterChula Vista, CA
Industry payments (Open Payments)
- 2025$444.14 · 14 payments from 5 companies
- 2024$371.81 · 10 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $181.12 | 7 |
| Alcon Vision LLC | $179.93 | 3 |
| Tarsus Pharmaceuticals, Inc. | $35.70 | 2 |
| Harrow Eye, LLC | $28.91 | 1 |
| Sight Sciences, Inc. | $18.48 | 1 |
What the 2025 payments were for
- Food and Beverage$444.14 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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