Gevork Joe Maissian, D.O.
NPI 1639320658ActiveIndividual· Internal Medicine· Glendale, CA
Internal Medicine (D.O.) in Glendale, California, licensed in CA, with an NPI issued in October 2008. Their prescriptions cost Medicare Part D more than their services did: $6,545,150 for 47,024 claims, against $590,361 paid for services in 2024. Amgen Inc. was the largest of 24 companies reporting payments in 2025, $2,762 in all, mostly food and beverage. Lists Glendale Adventist Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1639320658 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Oct 8, 2008 |
| Last updated in NPPES | Oct 3, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A10524 | CA |
| Hospitalist | 208M00000X | 20A10524 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 899 |
|---|---|
| Services billed | 9,611 across 39 procedure codes |
| Paid by Medicare | $590,361 |
Part D prescriptions in 2024
| Prescriptions (claims) | 47,024 · 51,738 30-day fills |
|---|---|
| Patients | 823 |
| Total drug cost | $6,545,150 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Glendale Adventist Medical CenterGlendale, CA
- Usc Verdugo Hills HospitalGlendale, CA
Other facilities
- Curing Hands Home Health, IncHome health agency · Burbank, CA
- Sudario Home Health Care, IncHome health agency · Glendale, CA
- Valley Home Health, IncHome health agency · N Hollywood, CA
Industry payments (Open Payments)
- 2025$2,762 · 114 payments from 24 companies
- 2024$3,110 · 136 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $383.96 | 18 |
| Abbvie Inc. | $322.91 | 15 |
| Glaxosmithkline, LLC. | $285.58 | 11 |
| Ardelyx, Inc. | $280.60 | 11 |
| Astrazeneca Pharmaceuticals LP | $250.37 | 10 |
What the 2025 payments were for
- Food and Beverage$2,762 · 114 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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