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

MARILEN E LOO, NP

NURSE PRACTITIONER

Graduated: 2015

NPI: 1891165155

Practice Locations (2)

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

789 E COOLEY DR

COLTON, CA 923244007

8887500036

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

9961 SIERRA AVE

FONTANA, CA 923356720

9094275000

Source: CMS National Downloadable File, September 2026.

MARILEN LOO, NP | HealthCareAtlasUSA