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Doctors / WI

RYAN D HOLZMACHER, MD

INTERNAL MEDICINE

Medical school: SOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1999

Also: NEPHROLOGY

NPI: 1598700601

Practice Locations (2)

OAK MEDICAL SC

18740 W BLUEMOUND RD

BROOKFIELD, WI 530452936

2627820230

MAPLE MEDICAL SC

N20W22961 WATERTOWN RD

WAUKESHA, WI 531861306

2628755070

Source: CMS National Downloadable File, September 2026.

RYAN HOLZMACHER, MD | HealthCareAtlasUSA