How to write a SOAP note: structure, examples and common mistakes

A SOAP note records a clinical encounter in four parts — Subjective, Objective, Assessment, Plan. Done well, it does two jobs at once: it documents what happened, and it structures your clinical reasoning so the next person (including future you) can follow the thinking. Done badly, it becomes a box-ticking ritual that buries the reasoning under copied-forward clutter. This guide covers what belongs in each section, two worked examples, how the format flexes across specialties, the mistakes clinicians make most, the medico-legal basics, and where an AI scribe genuinely helps.

It is written for clinicians as a practical reference. If you only have thirty seconds: lead the Subjective with the patient's own words, keep the Objective factual and measurable, make the Assessment an interpretation rather than a repetition, and tie every item in the Plan back to a problem you named.

What is a SOAP note?

The SOAP note is the most widely used documentation format in clinical practice, used across primary care, hospital medicine, allied health and mental health. It grew out of the problem-oriented medical record (POMR) developed by Dr Lawrence Weed roughly half a century ago, and it has endured because its structure mirrors how clinicians actually work: gather the story, examine and measure, interpret, then act. It functions as both a record and a cognitive framework for clinical reasoning (StatPearls, NCBI Bookshelf). For how it sits alongside other formats, see our explainer on SOAP vs POMR note formats.

Why the structure still matters

A good note is a clinical safety tool, a communication document and a legal record all at once. The SOAP structure supports all three: it forces you to separate what the patient reports from what you observe, and to separate observation from interpretation — the exact distinctions that prevent diagnostic anchoring and miscommunication between team members. It also makes a note scannable, so a colleague covering your patient at 2am can find the working diagnosis and the plan in seconds.

The four sections, in depth

S — Subjective

Everything the patient (or a collateral source) tells you. Open with the chief complaint in the patient's own words, then build the history of presenting illness. The OLD CARTS mnemonic keeps the HPI complete:

• Onset — when and how it started (sudden vs gradual).
• Location — where it is, and whether it moves.
• Duration — how long, and whether constant or intermittent.
• Character — the quality (sharp, dull, burning, crushing).
• Aggravating / alleviating factors — what makes it better or worse.
• Radiation — where it spreads.
• Timing — pattern over the day; Symptoms associated — pertinent positives and negatives.

Record the relevant past medical, drug, family and social history, and — crucially — pertinent negatives. The symptoms a patient denies are as informative as the ones they report, and they show your reasoning was systematic.

O — Objective

What you observe and measure, kept factual and reproducible:

• Vital signs (and trends, where relevant).
• Examination findings — system by system, including relevant normals.
• Mental-state observations where appropriate.
• Results already available: labs, imaging, point-of-care tests, ECG.

Resist the urge to interpret here — "coarse crackles at the right base" belongs in Objective; "consistent with pneumonia" belongs in Assessment. Keeping them apart is what makes the note defensible.

A — Assessment

Your interpretation of the subjective and objective data: the working diagnosis and, where there is uncertainty, a ranked differential with your reasoning. The commonest failing in the whole note is an assessment that merely restates the history. A strong assessment synthesises — it names the most likely diagnosis, lists the alternatives still in play, and says briefly why. For multi-problem patients, number each problem and assess it in turn; this is the heart of the problem-oriented record.

P — Plan

What happens next, mapped to each problem in the assessment. A complete plan usually covers five things:

• Investigations — tests ordered and why.
• Treatment — medication (with dose, route, duration), procedures, referrals.
• Patient education — what you explained and what the patient agreed to.
• Follow-up — when and with whom.
• Safety-netting — what should prompt the patient to seek help sooner, and how.

If any item in the plan doesn't trace back to a documented problem, either the problem is missing from the assessment or the action is unjustified — both are worth catching before you sign.

Worked example 1 — acute presentation

Worked example 2 — chronic review

How SOAP adapts across specialties

The skeleton is constant; the weighting shifts. Mental-health notes carry a much richer Subjective and a structured mental-state exam in the Objective. Surgical notes lean on the Objective (wound, drains, observations) and a crisp Plan. Physiotherapy and allied-health notes adapt the Objective to functional measures. Always check your organisation's, payer's and jurisdiction's documentation requirements before standardising a template.

Common mistakes to avoid

• Presenting reported symptoms as fact — subjective belongs under S, framed as what the patient reports.
• An assessment that only repeats the history instead of interpreting it.
• A plan disconnected from the problems you documented.
• Ambiguous or non-approved abbreviations that invite misreading.
• Missing safety-netting — the single most important line in many primary-care notes.
• Copy-forward bloat — carrying stale detail that no longer applies and can mislead.
• Interpretation leaking into Objective — keep findings and conclusions separate.

SOAP, billing and medico-legal basics

A note is a legal document. Sign and date every entry, record the time where it matters, and keep it legible and attributable. In many systems the note also supports coding and billing — the level of history, examination and decision-making documented can determine the recorded complexity of the visit. None of that should distort the clinical record: document what you did and why, and let the coding follow the note, not the other way round.

How an AI medical scribe fits in

The structure above is exactly what an AI medical scribe is built to produce. It listens to the consultation and drafts the SOAP note — filling the empty fields while leaving anything you've already written untouched — so the documentation keeps pace with the visit instead of following you home. The boundary matters: the scribe drafts; you review, edit and sign. It is a first draft that respects your authorship, not a replacement for your judgement. For the mechanics, see how AI medical scribes work.

Frequently asked questions

How long should a SOAP note be?

As long as it needs to be and no longer. A focused follow-up may be a few lines; a complex new presentation warrants more. Completeness and clarity matter more than length — every section present, reasoning visible, no padding.

What is the difference between a SOAP note and a progress note?

"Progress note" is the general term for a note documenting an encounter; SOAP is one widely used format for structuring it. Most progress notes in outpatient and inpatient settings follow the SOAP (or a SOAP-derived) structure.

What does OLD CARTS stand for?

Onset, Location, Duration, Character, Aggravating/Alleviating factors, Radiation, Timing, and associated Symptoms — a mnemonic for taking a complete history of presenting illness in the Subjective section.

Can AI write SOAP notes?

Yes — an AI medical scribe can draft a structured SOAP note from the consultation, but it is a draft for the clinician to review, edit and sign. It is clinical decision support and documentation assistance, not a substitute for clinical judgement.

References

• SOAP Notes. StatPearls, NCBI Bookshelf. ncbi.nlm.nih.gov/books/NBK482263
• Weed LL. The problem-oriented medical record — the origin of the SOAP structure.