The NAEON medical abbreviation means no acute events overnight. Clinicians write it at the start of a morning progress note to say that nothing urgent or unexpected happened to the patient during the night.
It is informal shorthand, common among hospital residents, interns and students, and you may see variants such as NAEO or NAE. It usually opens the subjective part of a SOAP note. Below you will see what counts as an acute event, how the phrase fits into a full note, and how much it really tells a patient reading their chart.
At a glance
Stands for
No acute events overnightVariants
NAEO, NAE, no AEONUsed in
Inpatient progress notes, ICU notes, roundsWhere in the note
Opening line of the subjective or interval sectionOften next to
VSS (vital signs stable), afebrile, NADStyle
Informal; not on formal safety lists
What the NAEON medical abbreviation tells the team
Hospital teams change shifts in the morning and evening. The day team needs to know quickly whether anything happened while they were away. NAEON answers that in one word: no rapid response calls, no falls, no new heart rhythm problems, no sudden drops in oxygen or blood pressure, and no urgent medicine changes.
It does not mean nothing at all happened. The patient may have had pain medicine, a lab draw or a routine dose change. Those are expected parts of care, not acute events.
What would count as an acute event
| Usually an acute event | Usually routine |
|---|---|
| Rapid response or code called | Scheduled medicines given |
| Fall or new injury | Routine labs drawn |
| New chest pain or arrhythmia | As needed pain medicine for expected pain |
| Low oxygen needing more support | Sleeping, eating and toileting as usual |
| Transfer to a higher level of care | Planned dressing change |
When something did happen, the note describes it instead, such as "Overnight, rapid response called for SBP 80s, given fluid bolus, improved."
How it fits into a full progress note
Morning note: "S: NAEON. Pt reports pain 3/10, slept well, tolerating regular diet. O: VSS, afebrile. A/P: POD 2 s/p lap chole, progressing well, plan d/c home today." The night was quiet, the patient feels better, vital signs are stable without fever, and the team plans discharge on day two after gallbladder surgery.
Terms such as VSS for vital signs stable and POD for postoperative day often appear in the same note.
Variants and similar shorthand
| Shorthand | Meaning |
|---|---|
| NAEON | No acute events overnight |
| NAEO | No acute events overnight (shorter form) |
| NAE | No acute events |
| NAD | No acute distress, an exam finding |
| VSS | Vital signs stable |
NAD is often confused with NAEON because both start with "no acute". NAD describes how the patient looks during the exam, while NAEON describes the night that just passed.
Reading NAEON in your own record
Patients and families reading hospital notes through a portal may see NAEON at the top of each day's entry. It is reassuring shorthand meaning the night went without urgent problems. It is not a full summary of how the patient is doing; the rest of the note covers symptoms, exam findings, results and the plan.
If you noticed something overnight that is not mentioned, such as new confusion or pain, share it with the nurse or the team on morning rounds.
For students writing progress notes
Use NAEON only after checking the overnight nursing notes, vital sign trends and any messages from the night team. Avoid writing it out of habit. Because it is informal, some programs ask students to write the phrase in full. More progress note shorthand lives in the nursing abbreviations guide.
A quiet night in the chart is one piece of the picture. The care team on duty can explain how a patient is doing overall.
Frequently asked questions
What does NAEON mean in a progress note?
NAEON means no acute events overnight. It tells the day team that nothing urgent, such as a fall or a rapid response, happened during the night.
Is NAEON the same as NAD?
No. NAD means no acute distress and describes how the patient looks on exam. NAEON summarizes the overnight period.
Does NAEON mean the patient is getting better?
Not by itself. It only says there were no urgent events overnight. The rest of the note covers progress, results and the plan.
Why do doctors write NAEON instead of the full phrase?
It saves time on busy morning rounds when many notes are written. Some teaching programs still prefer the phrase spelled out for clarity.