HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

JOAN J RYOO, MD

RADIATION ONCOLOGY

Medical school: HARVARD MEDICAL SCHOOL

Graduated: 2004

Offers telehealth

NPI: 1699854596

Practice Locations (4)

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

4725 -4733 SUNSET BLVD

LOS ANGELES, CA 900276021

3237834011

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

4733 W SUNSET BLVD

LOS ANGELES, CA 900276021

2136674784

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

4950 W SUNSET BLVD

LOS ANGELES, CA 900275822

3237834011

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

5601 DE SOTO AVE

WOODLAND HILLS, CA 913676701

8187192000

Source: CMS National Downloadable File, September 2026.

JOAN RYOO, MD | HealthCareAtlasUSA