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

MARIKO ISHIYAMA, DO

HOSPITALIST

Graduated: 2012

Also: FAMILY PRACTICE

NPI: 1952662991

Practice Locations (3)

GALEN INPATIENT PHYSICIANS PC

15630 18TH AVE

CLEARLAKE, CA 954229336

7079946486

JOHN MUIR PHYSICIAN NETWORK

2700 GRANT ST, SUITE 200

CONCORD, CA 945202270

9256740500

GALEN INPATIENT PHYSICIANS PC

869 N CHERRY ST

TULARE, CA 932742207

5596853462

Source: CMS National Downloadable File, September 2026.

MARIKO ISHIYAMA, DO | HealthCareAtlasUSA