Marianna Dichigrikian, NURSE PRACTITIONER
NPI 1528554284ActiveIndividual· Nurse Practitioner, Gerontology· Duarte, CA
Nurse Practitioner, Gerontology (NURSE PRACTITIONER) with City of Hope Medical Foundation, practicing in Duarte, California. Their prescriptions cost Medicare Part D more than their services did: $16,862 for 174 claims, against $1,982 paid for services in 2024. Astellas Pharma US Inc was the largest of 3 companies reporting payments in 2025, $94.01 in all, mostly food and beverage.
Overview
| NPI | 1528554284 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NURSE PRACTITIONER |
| Sole proprietor | Yes |
| NPI issued | Jul 6, 2018 |
| Last updated in NPPES | Dec 7, 2020 |
| Certified by provider | Dec 7, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Gerontology Primary | 363LG0600X | 95009274 | CA |
| Nurse Practitioner, Acute Care | 363LA2100X | 95009274 | 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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 21 |
|---|---|
| Services billed | 24 across 7 procedure codes |
| Paid by Medicare | $1,982 |
Part D prescriptions in 2024
| Prescriptions (claims) | 174 · 194 30-day fills |
|---|---|
| Patients | 60 |
| Total drug cost | $16,862 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Industry payments (Open Payments)
- 2025$94.01 · 4 payments from 3 companies
- 2024$220.23 · 9 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $45.60 | 2 |
| Glaxosmithkline, LLC. | $29.98 | 1 |
| Eisai Inc. | $18.43 | 1 |
What the 2025 payments were for
- Food and Beverage$94.01 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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