Dr. Chad Koyanagi, MD

Hospital Medicine •  Male • Age 51
Dr. Koyanagi
677 Ala Moana Blvd Ste 1025 Honolulu, HI 96813

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(808) 535-5975

Dr. Chad Koyanagi, MD is a Hospital Medicine Specialist in Honolulu, HI. He is affiliated with Adventist Health Castle. Be sure to call ahead with Dr. Koyanagi to book an appointment.

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At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • 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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Dr. Koyanagi accepts

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

(808) 535-5975

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
Hawaii Medical Service Association (HMSA)
Federal Plan 87
Health Plan Hawaii HMO
HMSA Akamai Advantage (PPO and PPO SNP)
Preferred Provider Plan PPO
QUEST Integration

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
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Experience Check

Check if Dr. Koyanagi treats your condition or procedure

Dr. Koyanagi's conditions and procedures:

  • Abdominal Pain
  • ADHD and-or ADD
  • Adjustment Disorder
  • Alcohol-Induced Mental Disorders
  • Alcoholism (Alcohol Dependence)
  • All Headaches (incl. Migraine)
  • Alzheimer's Disease
  • Amphetamine and Other Psychostimulant Dependence
  • Anemia
  • Anorexia
  • Antisocial Personality Disorder
  • Anxiety
  • Arrhythmias
  • Arthritis
  • Arthritis of the Elbow
  • Asthma
  • Atrial Fibrillation
  • Autism
  • Back Pain
  • Benign Chronic Pain Syndrome
  • Bipolar Disorder
  • Bleeding Disorders
  • Borderline Personality Disorder
  • Bronchitis
  • Burn Injuries
  • Cardiomyopathy
  • Cellulitis
  • Chronic Kidney Diseases
  • Chronic Neck Pain
  • Chronic Pain
  • Chronic Sinusitis
  • Coagulation Disorders (incl. Hemophilia)
  • Cold Sore
  • Combination Drug Dependence
  • Congestive Heart Failure
  • Constipation
  • Conversion Disorder
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Coronary Artery Disease (CAD)
  • Cough
  • Delusional Disorder
  • Dementia
  • Diabetes Type 2
  • Diabetes With Renal Manifestations
  • Diabetic Ketoacidosis
  • Dissociative, Conversion, and Factitious Disorders
  • Drug and Alcohol Dependence
  • Drug-Induced Mental Disorders
  • Eating Disorders
  • End-Stage Renal Disease
  • Enlarged Prostate (BPH)
  • Epilepsy
  • Fibromyalgia
  • Gastroesophageal Reflux Disease (GERD)
  • Gender Dysphoria
  • Gout
  • Headache
  • Heart Disease
  • Herpes Simplex Infection
  • Homicidal Ideation
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypokalemia
  • Hypothyroidism
  • Insomnia
  • Irritable Bowel Syndrome
  • Limb Pain
  • Limb Swelling
  • Lipid Disorders
  • Liver Function Test
  • Major Depressive Disorder
  • Malnutrition
  • Marijuana Addiction
  • Migraine
  • Nausea
  • Non-Alcoholic Fatty Liver Disease
  • Nondependent Alcohol Abuse
  • Nondependent Amphetamine or Related Acting Sympathomimetic Abuse
  • Nondependent Cocaine Abuse
  • Nondependent Drug and Alcohol Abuse
  • Nondependent Hallucinogen Abuse
  • Nondependent Marijuana Abuse
  • Obesity
  • Opioid Dependence
  • Osteoarthritis
  • Osteoarthritis of Ankle and Foot
  • Osteoarthritis of Shoulder
  • Osteopenia
  • Otitis Media
  • Overweight
  • Pancreatitis
  • Personality Disorders
  • Post-Traumatic Stress Disorder (PTSD)
  • Pregnancy Test
  • Psoriasis
  • Psychosis
  • Psychosis Due to Mental Illness
  • Rheumatoid Arthritis
  • Schizophrenia
  • Sedative, Hypnotic, or Anxiolytic Dependence
  • Seizure Disorders
  • Sinusitis
  • Sleep Apnea
  • Suicidal Ideation
  • Third-Degree Burns
  • Tobacco Use Disorder
  • Urinary Incontinence
  • Urinary Tract Infection (UTI)

Dr. Koyanagi's Reviews

Likelihood to recommend Dr. Koyanagi


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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.
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Kailua, Hi – Sep 16, 2016
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About Me


Dr. Chad Koyanagi, MD is a Hospital Medicine Specialist in Honolulu, HI. He is affiliated with Adventist Health Castle. Be sure to call ahead with Dr. Koyanagi to book an appointment.


  • Hospital Medicine
  • Addiction Psychiatry

Board Certifications

  • Addiction Psychiatry
  • Psychiatry


Frequently Asked Questions

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Where is Dr. Chad Koyanagi, MD's office located?



677 Ala Moana Blvd Ste 1025 Honolulu, HI 96813

Hospitalist Program

Hospitalist Program640 Ulukahiki St Kailua, HI 96734

Affiliated Hospitals

Check the quality of care at hospitals where Dr. Koyanagi treats patients.

Learn more

Adventist Health Castle

Kailua, HI

83% Patient experience rating, 14% higher than the national average

  • Outstanding Patient Experience Award™ (2020, 2019, 2018)
  • America's 250 Best Hospitals Award™ (2019)