Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Marisa Leiko Oishi, MD, MPH

Individual provider Emergency Medicine Physician · NPI 1295994739

Dr. Marisa Leiko Oishi, MD, MPH is an Emergency Medicine in Chinle, Arizona. Graduated from Oregon Health Sciences University School of Medicine in 2007, 19 years ago. Practices with Dhhs Phs Naihs Chinle Comprehensive Health Care Facility, a 165-clinician group and accepts Medicare assignment. Licensed in California and Washington.

Years since qualifying
19
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
CA, WA
In the registry since
2008
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MPH — Master of Public Health
A graduate degree in population health.

See every abbreviation used in this directory →

Practice location Address checks out

US 191 And Hospital Rd
Chinle, AZ 86503
Phone: (928) 674-7090
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A134104 (CA)
Emergency Medicine Physician Taxonomy 207P00000X (WA)

Record details

NPI number1295994739
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MPH
Sole proprietorNo
NPI enumeratedJune 9, 2008
Last updated in NPPESAugust 6, 2026
Certification dateAugust 6, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Dhhs Phs Naihs Chinle Comprehensive Health Care Facility — 165 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Chinle