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

JOANNA SING-LING MAACK, MD

EMERGENCY MEDICINE

Medical school: ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI

Graduated: 2005

NPI: 1235381831

Practice Locations (2)

EXER MEDICAL CORPORATION

26777 AGOURA RD, SUITE B4

CALABASAS, CA 913022967

8188802225

HMH EMERGENCY MEDICAL GROUP, INC.

100 W CALIFORNIA BLVD

PASADENA, CA 911053010

6264470296142

Source: CMS National Downloadable File, September 2026.

JOANNA MAACK, MD | HealthCareAtlasUSA