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

JOHN F MAHER, MD

OPHTHALMOLOGY

Medical school: LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE

Graduated: 1981

NPI: 1265561211

Practice Locations (3)

MARSHALL B KETCHUM UNIVERSITY

5460 E LA PALMA AVE

Anaheim, CA 928072023

MARSHALL B KETCHUM UNIVERSITY

5460 E LA PALMA AVE

ANAHEIM, CA 928072023

7144637505

22924 CRENSHAW BLVD

TORRANCE, CA 905053023

4243280091

Source: CMS National Downloadable File, September 2026.

JOHN MAHER, MD | HealthCareAtlasUSA