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

William Portman, MD

Individual provider Psychiatry Physician · NPI 1639551294

William Portman, MD is a Psychiatry Physician in Honolulu, Hawaii. Practices as a sole proprietor. Licensed in California and Hawaii.

Licensed in
CA, HI
In the registry since
2015
Specialties on file
2
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

604 Koko Isle Cir
Honolulu, HI 96825-1815
Phone: (405) 590-3825
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence MD20259 (HI)
Psychiatry Physician Taxonomy 2084P0800X · Licence A168551 (CA)

Record details

NPI number1639551294
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 19, 2015
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

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