Summary
DAX Copilot was one of two arms in the only randomised trial of ambient scribes ever run. It showed no statistically significant change in note-writing time against control. Nabla, the other arm, cut it 9.5 percent.2
DAX did improve physician wellbeing scores, which is a real result and we are not going to skip it. The version tested was current in 2025 and Microsoft has shipped since.
No procurement, no reseller, no implementation fee. Fourteen days free, then one published price.
Book a demo| What you get | DAX Copilot | WA\ |
|---|---|---|
| Randomised effect on note time | No significant change22Lukac PJ, Turner W, Vangala S, et al. Ambient AI Scribes in Clinical Practice, A Randomized Trial. NEJM AI 2025;2(12). 238 physicians, 14 specialties, approximately 72,000 encounters. | None published |
| Randomised effect on wellbeing | Improved | None published |
| Native Epic and Oracle Health | Yes, deepest available | Native, less deep |
| A briefing before the patient sits down | Not offered | Yes, built from the chart |
| ICD-10 coding attached to the decision | Yes | Yes, drafted against MDM |
| The phone, email and WhatsApp answered | Not offered | Yes, same record |
| Eligibility checked at booking | Not offered | Yes |
| How you buy it | Usually a Microsoft reseller11Microsoft acquired Nuance for $19.7 billion in 2021. DAX Copilot is reported between roughly $200 and $600 or more per clinician per month all-in once an implementation fee near $700 and reseller margin are counted. Microsoft does not publish per-clinician pricing. DAX runs natively in Epic, Oracle Health and athenahealth. | Direct, same price for everyone |
| Published price | Not published | See pricing |
What DAX is good at
Integration. Microsoft paid $19.7 billion for Nuance and the depth shows, running natively inside Epic, Oracle Health and athenahealth. If you are a Microsoft estate with a reseller relationship, DAX is the path of least resistance and that alone is a legitimate reason to buy it.
What the reseller does to the price
DAX lands between roughly $200 and $600 or more a clinician a month once an implementation fee near $700 and reseller margin are counted, and Microsoft publishes nothing. It is usually sold against your existing licence position, so the quote depends on what else you buy from Microsoft. Two practices can pay very different numbers for the same product.
The trial
UCLA randomised 238 physicians across 14 specialties, roughly 72,000 encounters. DAX showed no statistically significant change in note-writing time. Nabla cut it 9.5 percent. Neither reduced after-hours record time. Both improved wellbeing.
Read the wellbeing result properly rather than as a consolation. Physicians felt better while the measured time did not move, which tells you something about what documentation burden is made of.
The half nobody compares
DAX covers the consultation and is sold to organisations that have somebody else for the rest. If you are a practice, nobody else exists.
The number this comparison misses
Depth of integration and effect on your evening turn out to be different things, and the trial measured both. From 2026 your E/M level turns on Medical Decision Making, so the note is the evidence for the code and the code is the money.55From 2026, Medical Decision Making is the primary basis for E/M level selection. AAPC reports up to 19 percent of E/M visits undercoded at roughly $37 each. Reported Medicare Advantage downcoding runs $42 to $74 per visit and $28,000 to $74,000 per family physician per year. Up to 19 percent of E/M visits are undercoded at roughly $37 each, and Medicare Advantage downcoding takes $42 to $74 off a visit without ever appearing as a denial.
DAX is bought by organisations with revenue integrity teams who would spot a downcode. The practices buying it through the same reseller have nobody running that report at all.
Price
Microsoft does not publish. The figures here are third-party estimates and may be wrong, particularly since your quote depends on your licence position. We publish on one page, the same number for everyone.
Which one
Choose DAX Copilot if
- You are a Microsoft estate with an Epic deployment and a reseller relationship.
- You want the deepest native Epic and Oracle Health integration available.
- Procurement through your existing Microsoft agreement matters more than the note.
Choose WA\ if
- You want a number without a reseller conversation and a licence audit.
- Your evening is letters, codes and callbacks rather than notes.
- You want the front desk and the consultation on one record.
What we are not claiming
We were not in that trial. Nabla was, and won. Quoting somebody else research is not the same as having our own, and we have none. DAX also improved wellbeing under randomisation, which is more than we can currently demonstrate about ourselves.
Frequently asked questions
How much does DAX Copilot cost?
Microsoft does not publish per-clinician list pricing. Independent reporting places DAX Copilot between roughly $200 and $400 per provider per month, with other sources reporting $369 to $600 or more once implementation fees of around $700 and reseller margin are included, and some legacy enterprise configurations reported higher still. Treat every one of those as an estimate and confirm with Microsoft or your reseller. WA\ publishes its price, with a 14 day free trial and no minimum term.
Did DAX Copilot fail its clinical trial?
That is stronger than the evidence supports, and we would not put it that way. In the only randomised trial of ambient scribes published to date, DAX showed no statistically significant change in note-writing time against a control group, while Nabla in the same trial cut it by 9.5 percent. DAX did improve physician wellbeing and task load against control, which the trial also measured. It is one trial, at one site, over two months, on a version that has since been updated. It is also the only randomised evidence that exists.
Is DAX Copilot better than WA\?
At speech recognition in difficult conditions, almost certainly. Nuance spent twenty years on that problem and nobody has caught up. At documentation inside Epic at health-system scale, DAX is a serious and well-supported product. At everything after the note, and for any practice that cannot run an enterprise procurement, we think WA\ is the better answer. WA\ has no randomised evidence either, and we say so.
Live this week, not next quarter.
Thirty minutes and you will see the consultation, the front desk and the patient record running as one system.
About this article. Written and published by WA\, a competitor of Microsoft DAX Copilot, and we have said where Microsoft DAX Copilot is the better purchase. The randomised trial cited tested a version of DAX Copilot current in 2025, which has been updated since, and the wellbeing improvement it found for DAX is reported here alongside the primary result. Microsoft does not publish per-clinician pricing so figures quoted are third-party estimates. The randomised trial cited is independent of us, and Nabla, not WA\, holds the only randomised win in this category. Undercoding and downcoding figures are third-party RCM analysis, not our data. WA\ has no peer-reviewed clinical trials published to date and does not claim any. All names are marks belonging to their owners.