Clinicians affiliated with Adventist Health Simi Valley

Acute Care Hospitals · Voluntary non-profit - Private · 2975 N Sycamore Dr, Simi Valley, CA 93065 · Oxnard-Thousand Oaks-Ventura, CA · CCN 050236

Affiliation snapshotNovember 2, 2026CMS Doctors and Clinicians Facility Affiliation file, current snapshot (no end-of-2024 archive), applied to 2024
Activity year2024Medicare Part B claims, Original Medicare fee-for-service

397 clinicians affiliated with Adventist Health Simi Valley are in the 2024 Medicare Part B data (427 listed in the affiliation file).

Each clinician's exact figures are in their Physician Report, from their page. View sample report · Already purchased? Open your report (earlier Local report and passes)

Affiliated clinicians by specialty, 2024

All specialties · Internal Medicine (67) · Family Practice (45) · Diagnostic Radiology (32) · Emergency Medicine (26) · Anesthesiology (23) · Physician Assistant (23) · Obstetrics & Gynecology (20) · Nurse Practitioner (18) · Cardiology (14) · Hospitalist (13) · General Surgery (10) · Hematology-Oncology (10) · Orthopedic Surgery (8) · Pulmonary Disease (8) · Gastroenterology (7) · Endocrinology (6) · Neurology (6) · Neurosurgery (6) · Urology (5) · Infectious Disease (4) · Nephrology (4) · Pathology (4) · Critical Care (Intensivists) (3) · General Practice (3) · Medical Oncology (3) · Vascular Surgery (3) · Interventional Cardiology (2) · Interventional Radiology (2) · Physical Medicine and Rehabilitation (2) · Psychiatry (2) · Rheumatology (2) · Surgical Oncology (2) · Clinical Cardiac Electrophysiology (1) · Dermatology (1) · Geriatric Medicine (1) · Gynecological Oncology (1) · Hand Surgery (1) · Hospice and Palliative Care (1) · Ophthalmology (1) · Otolaryngology (1) · Pediatric Medicine (1) · Podiatry (1) · Radiation Oncology (1) · Sports Medicine (1) · Thoracic Surgery (1) · Undefined Physician type (1)

General Surgery affiliated with Adventist Health Simi Valley, 2024

Alphabetical by last name; 10.

NameCity
Mai Brooks, MDThousand Oaks, CA
David D Chi, M.D.Thousand Oaks, CA
Dantae D Davies, M.D.Simi Valley, CA
Timothy Deaconson, MDMankato, MN
Marissa Defreese, MDStamford, CT
Andrew Luckey, M.D.Simi Valley, CA
Leslie Memsic, M.D.Beverly Hills, CA
Andrea Pakula, M.D.Thousand Oaks, CA
Lauren Poliakin, MDThousand Oaks, CA
Mamta Swaroop, M.D.Chicago, IL

Affiliation comes from the CMS Doctors and Clinicians Facility Affiliation file, hospital rows only; name, address and type from the CMS Hospital General Information file. CMS does not publish an end-of-year archive of the affiliation file, so the current snapshot is applied to the latest data year. A clinician listed with several hospitals or groups appears on each of their pages. How hospital pages are built