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

MARK THEODO FAHLEN, MD

NEPHROLOGY

Medical school: ALBANY MEDICAL COLLEGE OF UNION UNIVERSITY

Graduated: 1998

NPI: 1679539415

Practice Locations (1)

1400 FLORIDA AVE, SUITE 109

MODESTO, CA 953504444

2095442910

Source: CMS National Downloadable File, September 2026.