Katie L. Marks, M.D.
NPI 1154596047ActiveIndividual· Internal Medicine· Culver City, CA
Internal Medicine (M.D.) in Culver City, California, trained at University of Maryland School of Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $70,780 for 137 claims, against $15,763 paid for services in 2024. Genzyme Corporation was the largest of 17 companies reporting payments in 2025, $1,708 in all, mostly food and beverage.
Overview
| NPI | 1154596047 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 23, 2008 |
| Last updated in NPPES | Oct 29, 2024 |
| Certified by provider | Oct 29, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A116095 | CA |
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 - Allergy/Immunology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 30 |
|---|---|
| Services billed | 1,031 across 12 procedure codes |
| Paid by Medicare | $15,763 |
Part D prescriptions in 2024
| Prescriptions (claims) | 137 · 160 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $70,780 |
| Generic share | 56% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Allergy/Immunology |
Industry payments (Open Payments)
- 2025$1,708 · 71 payments from 17 companies
- 2024$934.20 · 36 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $391.37 | 11 |
| Novartis Pharmaceuticals Corporation | $254.05 | 12 |
| Leo Pharma Inc. | $192.16 | 9 |
| Grifols USA, LLC | $158.79 | 9 |
| Glaxosmithkline, LLC. | $151.08 | 6 |
What the 2025 payments were for
- Food and Beverage$1,708 · 71 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 30 internal medicine physicians in Culver City · All internal medicine physicians in California