An AI doctor that shows its work.

A symptom checker is narrow on purpose. It asks a fixed set of intake questions, maps the answers to an urgency level and returns a short list of possible explanations. That structure is useful, but it usually stops at triage: it does not read the lab report you already have, and it does not help you prepare the questions for the appointment.

An AI doctor is a broader conversation. It can take a symptom history, a lab panel, a medication list or a document, and it can follow up on any of them. The better products cite sources, state uncertainty and know when to stop. The weaker ones sound like a doctor without the accountability.

A general chatbot is the least structured option. It answers whatever you type, in whatever tone you prompt, with no systematic red-flag check and often no source. It can be helpful for explanation, but it is the wrong tool for deciding whether a symptom can wait. Premedice combines the structured intake of a checker with the document handling of a medical assistant and the citation discipline a chatbot usually lacks.

Premedice is free to start, with no card: a starting credit and one document upload are enough to ask a medical question or read a standard lab panel. Pro adds more usage, pharmacogenomics, rare-disease matching and research tools; Advanced adds exportable summaries and priority access.

The comparison that matters is not only the subscription. A visit carries travel, a waiting room and time off work, and those costs are real even where the consultation itself is covered. The point of an AI doctor is not to replace the visit. It is to make the visit count, and to give you a reason to book sooner when a symptom should not wait.

It is also not a reason to skip care you need. If a symptom is severe, sudden or frightening, contact a clinician or emergency services. Saving a consultation fee is never worth delaying an emergency.

Ask about red flags first. Describe a symptom that should worry a clinician and see whether the tool escalates it or writes a calm paragraph. A tool that cannot say "this needs urgent care" has failed the most important test.

Ask what it cannot do. A credible product will say it cannot examine you, cannot diagnose and cannot replace emergency care. Then ask for the source behind a claim and check whether the citation actually supports it.

Finally, test it on something you already know. Use a lab value with a range you can verify on your own report. If the tool invents a range, stop. That single failure predicts the rest.

Premedice reads a lab report as a PDF, screenshot or phone photo, or pasted values with units. It reads a medication list, clinic notes and prior results. It uses that material to explain the findings, check whether a medicine could explain a value, and build a timeline for the appointment.

The limit is the material. If the report is blurry, the range is cropped out or the medication list is incomplete, the answer is weaker. Upload the original document where you can, redact your identifiers, and add the context that is not in the file: your age, sex, symptoms and what changed. The lab results interpreter explains the upload workflow in detail.