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

Michael Ishioka, MD

Individual provider Internal Medicine Physician · NPI 1811085400

Michael Ishioka, MD is an Internal Medicine in Honolulu, Hawaii. Graduated from University of Michigan Medical School in 1975, 51 years ago. Practices with Castle Medical Center, a 77-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Hawaii.

Years since qualifying
51
Trained at
University of Michigan Medical School
Licensed in
HI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

321 N Kuakini St Ste #201
Honolulu, HI 96817-2399
Phone: (808) 523-8611
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD-3260 (HI)

Record details

NPI number1811085400
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 10, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1975 (51 years in practice)
Group practice Castle Medical Center — 77 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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