Natalie Achamallah, M.D.
NPI 1255881546ActiveIndividual· Internal Medicine, Critical Care Medicine· West Hollywood, CA
Internal Medicine, Critical Care Medicine (M.D.) with Sansum Clinic, practicing in West Hollywood, California. Their prescriptions cost Medicare Part D more than their services did: $257,373 for 383 claims, against $115,305 paid for services in 2024. United Therapeutics Corporation was the largest of 14 companies reporting payments in 2025, $1,287 in all, mostly food and beverage. Lists Goleta Valley Cottage Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1255881546 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 11, 2016 |
| Last updated in NPPES | Mar 28, 2022 |
| Certified by provider | Mar 28, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Critical Care Medicine Primary | 207RC0200X | A158572 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 331 |
|---|---|
| Services billed | 1,313 across 66 procedure codes |
| Paid by Medicare | $115,305 |
Part D prescriptions in 2024
| Prescriptions (claims) | 383 · 589 30-day fills |
|---|---|
| Patients | 99 |
| Total drug cost | $257,373 |
| Generic share | 55% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Critical Care (Intensivists), Pulmonary Disease |
| Telehealth | Offers telehealth |
Medical group
- Sansum ClinicSanta Barbara, CA · 320 clinicians
Hospital affiliations
- Goleta Valley Cottage HospitalSanta Barbara, CA
- Lompoc Valley Medical CenterLompoc, CA
- Santa Barbara Cottage HospitalSanta Barbara, CA
- Santa Ynez Valley Cottage HospitalSolvang, CA
Industry payments (Open Payments)
- 2025$1,287 · 24 payments from 14 companies
- 2024$4,056 · 15 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| United Therapeutics Corporation | $351.98 | 4 |
| Regeneron Healthcare Solutions, Inc. | $262.19 | 3 |
| La Jolla Pharmaceutical Company | $174.37 | 2 |
| Sanofi-Aventis U.S. LLC | $92.99 | 1 |
| Merck Sharp & Dohme LLC | $75.11 | 1 |
What the 2025 payments were for
- Food and Beverage$996.87 · 20 payments
- Education$261.26 · 3 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$29.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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