HeyHippocratesA cited second opinion, for every specialty.
Clinical decision support that reasons like a trusted colleague in your field — grounded only in knowledge written and signed by board-certified specialists. Ask the question; get the answer, the decision rule, and what is missing.
Physician-only · license-verified · Basic $99 / Pro $149 per month · Founding Physicians: first month free, then 50% off for 3 months
62-year-old, incidental 6 mm right MCA aneurysm — treat or observe?
For most incidental aneurysms <7 mm in the anterior circulation without prior SAH, observation with interval imaging is reasonable — size, location and documented growth shift the balance toward treatment.
Decision ruleWeigh rupture risk (PHASES) against procedural risk. Posterior circulation, prior SAH, documented growth or younger age push toward securing the aneurysm.
Not established from this alone — exact morphology, family history and smoking status change the recommendation.
Worked examples only — nothing you type here is sent anywhere.
Neurosurgery
62-year-old, incidental 6 mm right MCA aneurysm — treat or observe?
- differential
- guideline lookup
- red-flag check
- citation check
For most incidental aneurysms <7 mm in the anterior circulation without prior SAH, observation with interval imaging is reasonable — size, location and documented growth shift the balance toward treatment.
- PHASES
- UIATS
- verified
Weigh rupture risk (PHASES) against procedural risk. Posterior circulation, prior SAH, documented growth or younger age push toward securing the aneurysm.
Not established from this alone — exact morphology, family history and smoking status change the recommendation.
Source: PHASES score (Greving et al., Lancet Neurol 2014) · UIATS (Etminan et al., Neurology 2015) · reviewed and signed by a board-certified specialist
Cardiology
New AF, CHA₂DS₂-VASc 3, worried about falls — anticoagulate?
- risk score
- guideline lookup
- red-flag check
- citation check
At CHA₂DS₂-VASc ≥2 the stroke-prevention benefit almost always outweighs fall risk — a patient would need to fall roughly 295 times a year for the harm to win. Prefer a DOAC over warfarin unless there is a mechanical valve or moderate–severe mitral stenosis.
- CHA₂DS₂-VASc
- guideline
- verified
Score ≥2 → anticoagulate; a DOAC is first-line; assess bleeding risk (HAS-BLED) to modify it, not to withhold therapy.
Not established from this alone — renal function, weight and prior bleeding refine the agent and the dose.
Source: ESC atrial fibrillation guideline 2020 · Man-Son-Hing et al., Arch Intern Med 1999 · reviewed and signed by a board-certified specialist
Emergency medicine
Febrile, hypotensive, lactate 4.2 after fluids — septic shock?
- differential
- guideline lookup
- red-flag check
- citation check
Suspected infection with vasopressor-requiring hypotension and lactate >2 mmol/L despite adequate fluids meets Sepsis-3 septic shock. Start broad-spectrum antibiotics within the first hour, 30 mL/kg balanced crystalloid, and norepinephrine targeting a MAP ≥65 mmHg.
- Sepsis-3
- SSC bundle
- verified
Pressor-dependent hypotension + lactate >2 after fluids = septic shock → run the hour-1 bundle now.
Not established from this alone — source, cultures and comorbidities guide antibiotic choice and de-escalation.
Source: Sepsis-3 (Singer et al., JAMA 2016) · Surviving Sepsis Campaign 2021 · reviewed and signed by a board-certified specialist
Worked examples in the exact format it answers. The physician always decides.
- Knowledge written and signed by board-certified specialists
- A vascular-neurosurgeon-led editorial process
- Clinical inputs de-identified on your device
- Physician-only · not a medical device
What it actually does in the room
Not a chat box — specific clinical jobs, each grounded in cited knowledge and run in your specialty’s reasoning voice.
- Pressure-test my planSteelman and stress-test your working plan before you commit to it.
- Build the differentialA structured, ranked differential — with what would move each item up or down.
- Guideline lookupThe relevant guideline recommendation, cited, in seconds.
- Red-flag checkThe can’t-miss diagnoses and safety flags for this presentation.
- Steelman & red-teamThe strongest case for — and against — your leading option.
- Clinical calculatorThe right score or formula, computed and interpreted in context.
- Similar cases & evidenceComparable cases and the evidence behind the call.
- Citation checkEvery claim checked against its source before you see it.
Pro · adds evidence appraisal, guideline-conflict resolution, case presentation and structured notes.
How it works
A thinking partner, not a search box. Three steps, the way you would use a colleague.
- 01
Ask, like you would ask a colleague
Type or speak a real clinical question, in plain language — the way you would curbside a trusted colleague between cases. No rigid syntax, no keyword search.
- 02
Get a cited, reasoned answer
A specialist-voiced answer grounded only in knowledge written and signed by board-certified specialists, with the decision rule and the specific data that would sharpen it.
- 03
Decide with the evidence in view
You stay the decision-maker. It carries the evidence and the caveats, so the call is yours: faster, and easier to explain.
Pick your specialty. Meet its colleague.
Every specialty has its own specialist voice and a cited knowledge base, written and signed by a board-certified specialist in that field.
Opening first
Also in build — 35 specialties
Brain, nerve & spine
Critical & emergency
Surgery
- General SurgeryThe acute abdomen, hernia and hepatobiliary calls.
- Plastic SurgeryReconstruction, flaps, hand and the aesthetic plan.
- Pediatric SurgeryNeonatal and childhood surgical emergencies.
- Colon & Rectal SurgeryAnorectal, colon and pelvic-floor decisions.
- UrologyStones, BPH, GU oncology and the acute scrotum.
Internal medicine
- Internal MedicineThe whole-patient workup across every system.
- EndocrinologyDiabetes, thyroid, adrenal and bone-mineral.
- GastroenterologyLuminal, hepatology and pancreaticobiliary.
- NephrologyAKI, CKD, electrolytes and acid-base.
- HematologyAnemia, coagulation, thrombosis and cytopenias.
- Infectious DiseasesSepsis, stewardship and the tough antibiotic call.
- PulmonologyAirways, ILD, the nodule and pleural disease.
- RheumatologyInflammatory arthritis, connective tissue and vasculitis.
Women, children & family
Senses, skin & mind
Movement & rehab
Whole-person & diagnostics
- Palliative CareSymptom control, communication and end-of-life.
- Occupational MedicineFitness-for-work, exposure and surveillance.
- Clinical NutritionMalnutrition, obesity and nutrition support.
- Endocannabinoid MedicineIndications, dosing and safety — governed.
- Medical CannabisIndication, THC:CBD dosing, interactions and the honest evidence.
- PathologyReporting, cytology and the intraoperative call.
No specialty matches that search.
Where it sits next to OpenEvidence and ChatGPT
A large language model answers any clinical question with total confidence and no idea whether it is right. A search engine finds papers. HeyHippocrates reasons inside your specialty from a knowledge base a specialist in your field wrote and signed, and tells you the decision rule and what is missing.
| Fact | HeyHippocrates | OpenEvidence | ChatGPT |
|---|---|---|---|
| Built for | Verified physicians only | Clinicians | Everyone |
| Where answers come from | A per-specialty knowledge base written and signed by board-certified specialists | Published literature search | General web-scale training data |
| One reasoning voice per specialty | Yes — 40 specialties in build | — | — |
| States the decision rule and what data is missing, on every answer | By design | — | — |
| Says when it cannot conclude | By design | — | — |
| The physician decides | Always — informational support, not a medical device | See their terms | See their terms |
— means not a stated feature of that product. Product facts checked against each vendor’s public site, September 2026.
Be one of the first physicians in.
The waitlist is a founding cohort: 40 specialties in build, neurosurgery opens first, and your specialty’s waitlist decides what opens next.
Basic $99 · Pro $149 per month after the founding period
- First month free — the whole product, no card.
- Then 50% off for three months.
- A numbered Founding Physician badge.
- First say on what your specialty gets next.
Join the waitlist
Leave your name, work email and specialty. One email when your specialty opens — with your Founding Physician offer.
One email at launch. No spam, ever.
Questions physicians ask
No. It is physician-facing clinical decision support — a cited thinking partner for your reasoning. It does not diagnose, does not treat, and gives no patient-facing advice. The clinical decision always stays with you.
Verified physicians only. Neurosurgery opens first, with cardiology, clinical oncology, emergency medicine and intensive care in the first wave; access is gated to licensed physicians.
Every answer is grounded only in knowledge written and signed by board-certified specialists — traceable to a named source. It reasons in the voice of your specialty, and always states the decision rule plus what data is missing, instead of a confident guess.
40 specialties are in build, each with its own specialist voice and cited knowledge base. Neurosurgery opens first; your specialty’s waitlist decides what opens next.
It is being built now. Waitlist members get first access and the Founding Physician offer: first month free, then 50% off for three months, plus a numbered founding badge.
This page collects only your name, email and specialty, for launch contact. In the product, clinical inputs are de-identified on your device; no patient data is stored on this website.
It says so. The answer names the competing recommendations, states the decision rule each one implies, and flags what data would settle it. It never picks for you when the evidence does not.
From a per-specialty knowledge base written and signed by board-certified specialists, reviewed on a fixed cadence and whenever a major guideline changes. Every answer carries its source line.
Clinical inputs are de-identified on your device before anything leaves it. Nothing on this marketing site stores clinical data; it collects only the name and email you give us.
It cites the guideline it used — by name and year — so you can see which body it follows and weigh it against your local protocol. Regional preferences are part of the specialist review.
Yes. Every answer ends with a source line you can copy, and the Pro plan adds structured notes and case-presentation formats.