1. Home
  2. Directory
  3. Hawaii
  4. Honolulu
  5. Psychiatry Neurology
  6. NPI Profile

DR. KOJI IIZUKA M.D.
NPI 1811213523
Psychiatry & Neurology - Psychiatry in Honolulu, HI

Active since April 20, 2010PECOS EnrolledAccepts Medicare Assignment
928 NUUANU AVE LOWR LEVEL, HONOLULU, HI 96817(808) 728-6618(808) 215-4255 Get Directions Write a Review

NPPES record last updated: June 24, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jun 24, 2025, May 12, 2021, Nov 18, 2020 and 1 more (4 updates tracked since 2018).

About Dr. Koji Iizuka M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KOJI IIZUKA M.D. (NPI 1811213523) is an individual psychiatry provider in Honolulu, Hawaii, licensed in Hawaii (16581) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (2010).

NPPES Registry Identity

NPI1811213523
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. KOJI IIZUKACredential: M.D.
Location Address928 NUUANU AVE LOWR LEVELHonolulu, HI 96817-5193
Mailing AddressAttn: Abs, P.o. Box 60599Ewa Beach, HI 96706 · (808) 664-1104 · Fax (866) 592-3149
Phone(808) 728-6618
Fax(808) 215-4255
Sole ProprietorNo
Medical School CMSLoma Linda University School Of MedicineGraduated 2010
Enumeration DateApril 20, 2010
Last NPPES UpdateJune 24, 20254 updates tracked since enumeration
NPPES CertifiedJune 24, 2025
✔ NPI 1811213523 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in HI · 16581✔ Licensed in GU · EMTL-2020-023
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
928 NUUANU AVE LOWR LEVEL, Honolulu, HI 96817
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HMSA.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Koji Iizuka M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6103242706
PECOS Enrollment IDI20200813000723
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
72 services21 patients
Psychotherapy with evaluation and management visit, 30 minutes 90833
Psychotherapy with evaluation and management is a 30-minute session where a mental health professional talks with you about your concerns and feelings. They assess your mental health, provide support, and manage your treatment plan to help improve your well-being.
33 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 96817 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$180.05 typical visit price
range $60.53 – $180.05
Typical copayment $45.01 (range $15.13 – $45.01)
Most-billed visit code 99205
Established Patient
$74.92 typical visit price
range $20.09 – $147.56
Typical copayment $18.73 (range $5.02 – $36.89)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DERICK CHAE, MD
Psychiatry & Neurology (Child & Adolescent Psychiatry)
928 NUUANU AVE LOWR LEVEL
HONOLULU, HI 96817
Honolulu County (808) 538-2800
CHRISTOPHER JOSHUA ATEN APRN, PMHNP-BC
Nurse Practitioner (Psychiatric/Mental Health)
928 NUUANU AVE LOWR LEVEL
HONOLULU, HI 96817
Honolulu County (808) 600-3901
MANDALAY CLINIC LLC
Nurse Practitioner (Psychiatric/Mental Health)
928 NUUANU AVE LOWR LEVEL
HONOLULU, HI 96817
Honolulu County (315) 547-0502
PACIFIC PSYCHIATRIC SERVICES, LLC
Nurse Practitioner (Psychiatric/Mental Health)
928 NUUANU AVE LOWR LEVEL
HONOLULU, HI 96817
Honolulu County (808) 600-3901
THERAPY PLUS
Clinic/Center (Multi-Specialty)
928 NUUANU AVE LOWR LEVEL, STE 2
HONOLULU, HI 96817
Honolulu County (808) 465-8740
MS. MACEY MIN-CHU LUO-SOUZA APRN-RX
Clinical Nurse Specialist (Psychiatric/Mental Health, Child & Adolescent)
928 NUUANU AVE LOWR LEVEL
HONOLULU, HI 96817
Honolulu County (808) 383-2644

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Koji Iizuka's NPI number?

The NPI number for Koji Iizuka is 1811213523. It was assigned to this individual provider in the NPPES registry on April 20, 2010.

Where is Koji Iizuka located?

Koji Iizuka practices at 928 Nuuanu Ave Lowr Level, Honolulu, HI 96817. The listed phone number is (808) 728-6618.

What is Koji Iizuka's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Koji Iizuka enrolled in Medicare?

Yes. Koji Iizuka is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Koji Iizuka accept?

Health plans from HMSA list Koji Iizuka as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Koji Iizuka was last updated on June 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.