Meet DR GPT™: Dr. Harvey Castro on Patients, Robots, and Who Will Drive AI in Medicine

By the time your patient reaches you, you may be their fourth opinion. They have already asked a chatbot, or several, and they arrive with a diagnosis, a drug name, and a level of confidence you did not create.

In this episode of How I Doctor, Offcall co-founder Dr. Graham Walker sits down with Dr. Harvey Castro, an emergency physician, MBA, and one of the most visible physician voices on AI in healthcare, known as DR GPT™. Before he became an AI evangelist, Harvey owned and ran freestanding emergency departments in Texas, with a payroll he personally guaranteed. He wrote one of the first medical apps for the iPhone, then wrote a book on ChatGPT in healthcare days after it launched, against the advice of friends. His message to physicians is simple: treat AI output as a draft, not a decision, and keep the clinician accountable for making the call.

Harvey and Graham get into what changes when patients show up with an AI first opinion, and why Harvey worries about both bias in the models and patients self-treating. He makes the case that generative AI is mostly a communication tool, from discharge instructions as coloring books to coaching physicians on bedside manner. He describes the personal digital twin he built from his wearables, genetics, labs, and medical record, and why he believes patients, not hospitals or governments, will drive the next wave of AI. Graham pushes back on whether the next generation will really prefer a robot to a human doctor, and the two debate what happens to the role of physicians over the next 50 years.

The conversation closes with rapid-fire takes, including whether ambient AI scribes are overhyped, why Harvey calls the human in the loop a scapegoat in the loop, what he thinks is the biggest mistake medicine could make with AI, and the one thing he says AI should never touch.

What You’ll Learn

• Why patients arriving with an AI first opinion creates new risks around bias, self-treatment, and physician liability
• How generative AI can improve communication across languages, cultures, and ages, and even coach doctors on bedside manner
• Why Harvey believes patients, not hospitals, will drive AI adoption, and what a patient “Bill of Rights” for AI could look like
• Why “human in the loop” can really mean “scapegoat in the loop”
• Where Harvey draws the line on what AI should never do

📖 Learn more about Dr. Harvey Castro, his apps, books, and speaking at https://HarveyCastroMD.com

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📝 For a full transcript of this episode click HERE

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