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Dr. Henry Onyeaka, MD, MPH

Dr. Henry Onyeaka, MD, MPH

Psychiatrist
600 Strada Cir, Ste 2028, Mansfield, TX
Dr. Henry Onyeaka, MD, MPH Dr. Henry Onyeaka is a Harvard-trained, board-certified psychiatrist and the founder of Iroko Psychiatry. He provides comprehensive, evidence-based psychiatric care with a focus on helping patients achieve meaningful, lasting improvements in their mental health and daily functioning. Dr. Onyeaka completed his psychiatry residency at Massachusetts General Hospital and McLean Hospital, both teaching hospitals of Harvard Medical School. During residency, he served as Chief Resident in Addiction Psychiatry. He earned his Master of Public Health from the Harvard T.H. Chan School of Public Health, where his work focused on population health and expanding access to high-quality behavioral care. Dr. Onyeaka currently serves as an Assistant Professor of Clinical Psychiatry at the Geisinger Commonwealth School of Medicine and works part-time as a Staff Psychiatrist at McLean Hospital. He has extensive experience treating a wide range of psychiatric conditions and offers: - ADHD evaluations and treatment - Anxiety disorders - Depression - Mood disorders (including bipolar disorder) - Substance use and addiction treatment Dr. Onyeaka has particular expertise in reproductive psychiatry, supporting women who are planning pregnancy, currently pregnant, or in the postpartum period. He also works closely with students and young professionals, addressing academic stress, burnout, attention difficulties, and transitions during high-demand periods of life. With clinical experience across diverse healthcare systems, including early medical practice in Ghana and Nigeria, Dr. Onyeaka integrates evidence-based psychiatry with cultural awareness, empathy, and measurement-driven care. Known to many patients as “Dr. O,” he is committed to delivering care that is both clinically rigorous and deeply human, with a focus on collaboration, clarity, and real-world results.
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About Dr. Henry Onyeaka

Clientele seen

Young adults (18-24)
Individuals
Adults (25-64)
Seniors (65+)

Identity

Gender

Male

Languages spoken

English

Getting to know Dr. Henry Onyeaka

Dr. Henry Onyeaka, MD, MPH Dr. Henry Onyeaka is a Harvard-trained, board-certified psychiatrist and the founder of Iroko Psychiatry. He provides comprehensive, evidence-based psychiatric care with a focus on helping patients achieve meaningful, lasting improvements in their mental health and daily functioning. Dr. Onyeaka completed his psychiatry residency at Massachusetts General Hospital and McLean Hospital, both teaching hospitals of Harvard Medical School. During residency, he served as Chief Resident in Addiction Psychiatry. He earned his Master of Public Health from the Harvard T.H. Chan School of Public Health, where his work focused on population health and expanding access to high-quality behavioral care. Dr. Onyeaka currently serves as an Assistant Professor of Clinical Psychiatry at the Geisinger Commonwealth School of Medicine and works part-time as a Staff Psychiatrist at McLean Hospital. He has extensive experience treating a wide range of psychiatric conditions and offers: - ADHD evaluations and treatment - Anxiety disorders - Depression - Mood disorders (including bipolar disorder) - Substance use and addiction treatment Dr. Onyeaka has particular expertise in reproductive psychiatry, supporting women who are planning pregnancy, currently pregnant, or in the postpartum period. He also works closely with students and young professionals, addressing academic stress, burnout, attention difficulties, and transitions during high-demand periods of life. With clinical experience across diverse healthcare systems, including early medical practice in Ghana and Nigeria, Dr. Onyeaka integrates evidence-based psychiatry with cultural awareness, empathy, and measurement-driven care. Known to many patients as “Dr. O,” he is committed to delivering care that is both clinically rigorous and deeply human, with a focus on collaboration, clarity, and real-world results.

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In-network insurances

Aetna
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Popular visit reasons

Anxiety
Anxiety Disorder
Attention-Deficit / Hyperactivity Disorder (ADHD)
Depression
Postpartum Depression
Prescription / Refill
Psychiatry Consultation
Women's Mental Health Issues
Anxiety
Anxiety Disorder
Attention-Deficit / Hyperactivity Disorder (ADHD)
Depression

Office location

Dr. Henry Onyeaka, MD, MPH also offers online video visits for patients
Iroko Psychiatry PLLC
600 Strada Cir, Ste 2028, Mansfield, TX 76063
Get directions

Education and background

Practice names

Board certifications

  • Psychiatry (American Board of Psychiatry and Neurology)

Education and training

  • Medical School - Kwame Nkrumah University of Science and Technology, Doctor of Medicine
  • Harvard Medical School, Residency in Psychiatry
  • Massachusetts General Hospital, Residency in Addiction Psychiatry

Professional memberships

  • American Medical Association
  • American Society of Addiction Medicine
  • American Psychiatric Association

NPI number

1932738382

Patient reviews

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Frequently asked questions

How soon can I make an appointment with Dr. Henry Onyeaka?

Generally, Dr. Henry Onyeaka has appointments available on Zocdoc within 1 week. You can see Dr. Onyeaka's earliest availability on Zocdoc and make an appointment online.

Is Dr. Henry Onyeaka accepting new patients?

Dr. Henry Onyeaka generally accepts new patients on Zocdoc. You can see Dr. Onyeaka's earliest availability on Zocdoc and schedule an appointment online.

Does Dr. Henry Onyeaka accept my insurance?

Choose your insurance plan to verify if Dr. Onyeaka is in-network.

Can I make an appointment with Dr. Henry Onyeaka online?

Yes, you can make an appointment online with Dr. Onyeaka using Zocdoc. It’s simple, secure, and free.

What practice does Dr. Henry Onyeaka work with?

Where is Dr. Henry Onyeaka's office located?

Dr. Henry Onyeaka has 7 office locations, including in New Ashford, Centertown, North Richland Hills, Dallas, Mansfield, and Hartstown, view full addresses on Dr. Onyeaka's profile.

Which board certifications does Dr. Henry Onyeaka have?

Dr. Henry Onyeaka is certified by Psychiatry (American Board of Psychiatry and Neurology).

What are common reasons for patients to see Dr. Henry Onyeaka?

Dr. Henry Onyeaka frequently sees patients for Anxiety, Attention-Deficit / Hyperactivity Disorder (ADHD), Depression, Prescription / Refill, and Psychiatry Consultation. You can see other visit reasons for Dr. Henry Onyeaka on their profile.

What languages does Dr. Henry Onyeaka speak?

Dr. Henry Onyeaka speaks English.

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