Lenna Alessandra Martyak, M.D.
NPI 1164638177ActiveIndividual· Internal Medicine, Gastroenterology· Santa Monica, CA
Internal Medicine, Gastroenterology (M.D.) in Santa Monica, California, trained at Georgetown University School of Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $1,283,661 for 1,483 claims, against $160,786 paid for services in 2024. Abbvie Inc. was the largest of 14 companies reporting payments in 2025, $2,301 in all, mostly food and beverage.
Overview
| NPI | 1164638177 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 15, 2007 |
| Last updated in NPPES | Sep 14, 2021 |
| Certified by provider | Sep 14, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A87515 | 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 | 666 |
|---|---|
| Services billed | 1,462 across 43 procedure codes |
| Paid by Medicare | $160,786 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,483 · 2,649 30-day fills |
|---|---|
| Patients | 350 |
| Total drug cost | $1,283,661 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Providence Saint Johns Medical FoundationSanta Monica, CA · 281 clinicians
Hospital affiliation
- Saint John's Health CenterSanta Monica, CA
Industry payments (Open Payments)
- 2025$2,301 · 100 payments from 14 companies
- 2024$2,168 · 87 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $993.30 | 48 |
| Ardelyx, Inc. | $317.66 | 10 |
| Pfizer Inc. | $270.21 | 11 |
| Lilly USA, LLC | $153.29 | 8 |
| Genzyme Corporation | $143.02 | 5 |
What the 2025 payments were for
- Food and Beverage$2,301 · 100 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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