Dr. Chad Koyanagi, MD

Addiction PsychiatryMaleAge 53

Addiction Psychiatry

Dr. Chad Koyanagi, MD is an Addiction Psychiatry Specialist in Honolulu, HI and has over 28 years of experience in the medical field. He graduated from University of Hawaii At Manoa in 1995. He is affiliated with Adventist Health Castle. His office is not accepting new patients.

Dr. Chad Koyanagi, MD
401 Kamakee St Ste 409 Honolulu, HI 96814

Make an Appointment

(808) 488-8498
  • Practices at Top Hospital
    Outstanding Patient Experience Award™ See hospitals
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. See hospitals

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Experience and Background Checks


Background Check

Healthgrades does not collect malpractice claims information for Hawaii
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Experience Check

Check if Dr. Koyanagi treats your condition or procedure

Dr. Koyanagi's conditions and procedures:

  • Abdominal Pain
  • Acidosis
  • Acute Kidney Failure
  • ADHD and-or ADD
  • Alcohol Withdrawal
  • All Headaches (incl. Migraine)
  • Anxiety
  • Asthma
  • Back Pain
  • Bedsores
  • Bell's Palsy
  • Bruise of Face, Scalp, or Neck
  • Cerebrovascular Disease
  • Chest Pain
  • Constipation
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Dehydration
  • Diabetes Type 1
  • Diabetes Type 2
  • Diabetes With Renal Manifestations
  • Diabetic Ketoacidosis
  • Diarrhea
  • Dizziness
  • Drug Withdrawal
  • Dyslipidemia
  • Dysphagia
  • Epilepsy
  • Gastroesophageal Reflux Disease (GERD)
  • Headache
  • Heart Attack (Acute Myocardial Infarction)
  • Hiatal Hernia
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypokalemia
  • Hyposmolality and Hyponatremia
  • Limb Pain
  • Limb Swelling Caused by Fluid Overload
  • Liver Function Test
  • Low Back Pain
  • Malaise and Fatigue
  • Migraine
  • Nausea
  • Pregnancy Test
  • Priapism
  • Seizure Disorders
  • Sepsis
  • Tobacco Use Disorder
  • Urinary Tract Infection (UTI)
  • Vitamin B Deficiency

Insurance Check

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Dr. Koyanagi accepts

Accepted insurance can change. Please double-check when making an appointment.

(808) 488-8498

Dr. Koyanagi accepts the following insurance:

Choice Plus POS II
National (BlueCard) PPO
Blue Cross Blue Shield
Blue Card PPO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
Cigna PPO
Open Access Plus

Dr. Koyanagi's Reviews

Likelihood to recommend Dr. Koyanagi


Based on 4 ratings

5 Star
4 Star
3 Star
2 Star
1 Star

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My experience with Dr. KOYANAGI left me feeling hopeless & helpless. This doctor should not practice medicine. His explanation to me re my son's psychotic episode/illness was incomplete and entirely unacceptable. I would not recommend him ever. He was impatient, inconsiderate and frankly reprehensible.
What went well
No results
What could be improved
  • Long wait times
5 people found this helpful
Kailua, Hi – Sep 16, 2016
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About Me


Dr. Chad Koyanagi, MD is an Addiction Psychiatry Specialist in Honolulu, HI and has over 28 years of experience in the medical field. He graduated from...Read more


  • Addiction Psychiatry

Board Certifications


University of Hawaii At Manoa
Medical School


Frequently Asked Questions

What is the best way to schedule an appointment with Dr. Chad Koyanagi, MD?

Find contact information here to make an appointment.

Does Dr. Chad Koyanagi, MD accept any insurance plans?

A list of accepted insurance providers is available on the Healthgrades insurance check. It is always a good idea to verify your insurance when making an appointment.

What conditions does Dr. Chad Koyanagi, MD treat?

Dr. Koyanagi frequently treats the following conditions: Abdominal Pain, Acidosis, and Acute Kidney Failure. See more on Healthgrades.

What is Dr. Chad Koyanagi, MD's office address?

Dr. Koyanagi's office is located at 401 Kamakee St Ste 409, Honolulu, HI 96814. You can find other locations and directions on Healthgrades.

Is Dr. Chad Koyanagi, MD affiliated with any hospitals?

Dr. Chad Koyanagi, MD is affiliated with Adventist Health Castle.

Is Dr. Chad Koyanagi, MD a board-certified professional?

Yes, Dr. Chad Koyanagi, MD holds board certifications in Psychiatry.

How much experience does Dr. Chad Koyanagi, MD have?

Dr. Koyanagi has over 27 years of healthcare experience.



401 Kamakee St Ste 409 Honolulu, HI 96814
928 Nuuanu Ave Ste 301 Honolulu, HI 96817

Affiliated Hospitals

Dr. Koyanagi is affiliated with the following hospital. Select the hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Adventist Health Castle

Kailua, HI

81% Patients that would definitely recommend, 11% higher than the national average

4 Awards Received

Award Highlight: Outstanding Patient Experience Award™ (2022)