Koji Iizuka, M.D.
Psychiatry Physician · Honolulu, HI
Koji Iizuka, M.D. is a psychiatry physician with a practice address in Honolulu, Hawaii, and NPI 1811213523, issued on Apr 20, 2010. Check the license (Hawaii 16581, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Koji Iizuka
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 16581 HI
EMTL-2020-023 GU
Self-reported in NPPES; status is on the state search - Practice location
- 928 Nuuanu Ave Lowr Level, Honolulu, HI 96817
- Phone
- (808) 728-6618
- Enumerated
- Apr 20, 2010
- Record last updated
- Jun 24, 2025
- Fax
- (808) 215-4255
- Medicare enrollment
- Enrolled (PECOS I20200813000723); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 928 Nuuanu Ave Lowr Level
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Aten, APRN, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1497579759
- Macey Luo-Souza, APRN-RXChild & Adolescent Psychiatric/Mental Health Clinical Nurse Specialist1891947669
Verify Koji Iizuka in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 16581Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average psychiatry physician in 2024
272 Medicare Part D claims for 26 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Lamotrigine27 claims
- Fluphenazine Hcl23 claims
- Quetiapine Fumarate22 claims
- Escitalopram Oxalate14 claims
- Fluoxetine Hcl14 claims
- Lybalvi12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
175 psychiatry physician records list a practice address in Honolulu
They are 175 of the 12,408 NPPES records with a practice address in Honolulu, and 331 psychiatry physician records in Hawaii.
All 175 in Honolulu → All 331 in Hawaii → Every provider in Honolulu →
Other psychiatry physician records in Hawaii
- Janette AbramowitzHonolulu, HI1275952335
- Roman Anthony Acierto, D.O.Honolulu, HI1710128723
- Ryan Adachi, DOHonolulu, HI1295471704
- Joanna Ajex Palvannan, MDHonolulu, HI1497449466
- Jeffrey AkakaHonolulu, HI1871707307
- Albert Albatrosov, M.D.Hilo, HI1982640355
- Samuel Alexander, DOHonolulu, HI1255969036
- Evan Allen, DOTripler Army Medical Center, HI1710547443
- Eugene Altman, M.D.Honolulu, HI1720128358
- Darius Amjadi, M.D.Honolulu, HI1275639973
Common questions
What is Koji Iizuka, M.D.'s NPI number?
Koji Iizuka, M.D.'s National Provider Identifier (NPI) is 1811213523, issued on Apr 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Koji Iizuka, M.D. located?
The NPPES record lists a practice address at 928 Nuuanu Ave Lowr Level, Honolulu, HI, 96817. Phone: (808) 728-6618. Providers update this record themselves, so call before visiting.
How can I verify Koji Iizuka, M.D.'s license?
NPPES lists Hawaii license number 16581, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Koji Iizuka, M.D. prescribe under Medicare Part D?
In 2024, Koji Iizuka, M.D. had 272 Medicare Part D claims for 26 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.