Mark Mehrdad Davidson, M.D.
NPI 1164459178ActiveIndividual· Internal Medicine· Los Angeles, CA
Internal Medicine (M.D.) in Los Angeles, California, trained at University of California, Geffen School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $414,575 for 1,046 claims, against $130,610 paid for services in 2024. Janssen Biotech, Inc. was the largest of 13 companies reporting payments in 2025, $2,277 in all, mostly food and beverage.
Overview
| NPI | 1164459178 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 26, 2006 |
| Last updated in NPPES | Jan 29, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A67586 | CA |
| Internal Medicine, Gastroenterology | 207RG0100X | A67586 | CA |
| Internal Medicine, Hepatology | 207RI0008X | A67586 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 388 |
|---|---|
| Services billed | 2,085 across 38 procedure codes |
| Paid by Medicare | $130,610 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,046 · 1,611 30-day fills |
|---|---|
| Patients | 324 |
| Total drug cost | $414,575 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliation
- Cedars-Sinai Medical CenterLos Angeles, CA
Industry payments (Open Payments)
- 2025$2,277 · 70 payments from 13 companies
- 2024$2,444 · 115 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $472.75 | 10 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $444.60 | 25 |
| Abbvie Inc. | $316.55 | 5 |
| Capsovision, Inc. | $274.25 | 2 |
| Genzyme Corporation | $272.10 | 7 |
What the 2025 payments were for
- Food and Beverage$2,277 · 70 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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