Hovsep Ghevont Mahdessian, MD
NPI 1659544203ActiveIndividual· Internal Medicine· Palmdale, CA
Internal Medicine (MD) with High Desert Medical Corporation and 1 other group, practicing in Palmdale, California. Their prescriptions cost Medicare Part D more than their services did: $218,859 for 2,505 claims, against $21,329 paid for services in 2024. Dexcom, Inc. reported $43.58 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1659544203 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 3, 2008 |
| Last updated in NPPES | Nov 23, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A102305 | CA |
| Internal Medicine | 207R00000X | O36.120147 | IL |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 137 |
|---|---|
| Services billed | 2,700 across 63 procedure codes |
| Paid by Medicare | $21,329 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,505 · 4,250 30-day fills |
|---|---|
| Patients | 385 |
| Total drug cost | $218,859 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Family Practice |
Medical groups
- High Desert Medical CorporationLancaster, CA · 54 clinicians
- Roy Medical Group IncPalmdale, CA · 4 clinicians
Other facilities
- Giving Hands Home Health Care, IncHome health agency · Encino, CA
Industry payments (Open Payments)
- 2025$43.58 · 1 payment from 1 company
- 2024$15.87 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $43.58 | 1 |
What the 2025 payments were for
- Food and Beverage$43.58 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 35 internal medicine physicians in Palmdale · All internal medicine physicians in California