Mark Floyd Lew, M.D.
NPI 1578507505ActiveIndividual· Psychiatry & Neurology, Neurology· Los Angeles, CA
Psychiatry & Neurology, Neurology (M.D.) in Los Angeles, California, trained at George Washington University School of Medicine (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $552,565 for 1,865 claims, against $64,421 paid for services in 2024. Mdd US Operations, LLC was the largest of 4 companies reporting payments in 2025, $45,537 in all, mostly honoraria.
Overview
| NPI | 1578507505 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 16, 2006 |
| Last updated in NPPES | Nov 27, 2023 |
| Certified by provider | Sep 21, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | A45068 | 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 - Neurology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 240 |
|---|---|
| Services billed | 1,232 across 17 procedure codes |
| Paid by Medicare | $64,421 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,865 · 3,397 30-day fills |
|---|---|
| Patients | 203 |
| Total drug cost | $552,565 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical group
- Usc Care Medical Group IncLos Angeles, CA · 1,380 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Cedars-Sinai Medical CenterLos Angeles, CA
- Huntington HospitalPasadena, CA
- Keck Hospital of UscLos Angeles, CA
Other facilities
- Sunny Days Home Care, Inc.Home health agency · Glendale, CA
Industry payments (Open Payments)
- 2025$45,537 · 53 payments from 4 companies
- 2024$24,881 · 33 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mdd US Operations, LLC | $43,837 | 49 |
| Abbvie Inc. | $1,050 | 2 |
| Sumitomo Pharma America, Inc. | $625.00 | 1 |
| Sanofi Pasteur Inc. | $25.20 | 1 |
What the 2025 payments were for
- Honoraria$35,113 · 13 payments
- Travel and Lodging$6,294 · 12 payments
- Consulting Fee$2,430 · 3 payments
- Food and Beverage$1,075 · 24 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$625.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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