Lisa Martine Chaiken, MD
NPI 1528062023ActiveIndividual· Radiology, Radiation Oncology· Santa Monica, CA
Radiology, Radiation Oncology (MD) in Santa Monica, California, trained at University of California, Geffen School of Medicine (class of 1988). 406 Medicare patients in 2024, $1,806,627 paid; nearly all of their 383 Part D prescriptions were generic (90%). Merck Sharp & Dohme LLC was the largest of 27 companies reporting payments in 2025, $780.85 in all, mostly food and beverage.
Overview
| NPI | 1528062023 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 13, 2005 |
| Last updated in NPPES | Nov 18, 2020 |
| Certified by provider | Nov 18, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | G66880 | 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 - Radiation Oncology (CA); Practitioner - Radiation Oncology (IA); Practitioner - Radiation Oncology (NE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 406 |
|---|---|
| Services billed | 11,692 across 62 procedure codes |
| Paid by Medicare | $1,806,627 |
Part D prescriptions in 2024
| Prescriptions (claims) | 383 · 415 30-day fills |
|---|---|
| Patients | 151 |
| Total drug cost | $4,734 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Radiation Oncology |
Medical group
- Northwest Iowa Hospital CorporationBellevue, NE · 160 clinicians
Hospital affiliation
- St Lukes Regional Medical CenterSioux City, IA
Industry payments (Open Payments)
- 2025$780.85 · 40 payments from 27 companies
- 2024$989.59 · 51 payments from 27 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $92.78 | 5 |
| Novartis Pharmaceuticals Corporation | $62.08 | 3 |
| Telix Pharmaceuticals | $60.37 | 1 |
| Janssen Biotech, Inc. | $56.92 | 3 |
| Astrazeneca Pharmaceuticals LP | $53.49 | 2 |
What the 2025 payments were for
- Food and Beverage$780.85 · 40 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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