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 / IA

DOUGLAS T SUMMERFIELD, MD

INTERNAL MEDICINE

Medical school: CREIGHTON UNIVERSITY SCHOOL OF MEDICINE

Graduated: 2007

NPI: 1518120633

Practice Locations (1)

NORTH IOWA MERCY CLINICS

1000 4TH ST SW

MASON CITY, IA 504012800

Source: CMS National Downloadable File, September 2026.

DOUGLAS SUMMERFIELD, MD | HealthCareAtlasUSA