The SOAP method is a structured way of writing medical notes, organized into four sections: Subjective, Objective, Assessment, and Plan. It’s the most widely used documentation format in healthcare, and nearly every doctor, nurse, therapist, or counselor learns it during training. Whether you’re a student encountering it for the first time or a patient curious about how your medical records are organized, understanding SOAP notes is straightforward once you see how the four parts fit together.
Where SOAP Notes Came From
The SOAP format was created by Dr. Larry Weed, a physician widely known as the father of the problem-oriented medical record. He first published his framework in 1964 and brought it to national attention in 1968 with a landmark paper in the New England Journal of Medicine titled “Medical Records that Guide and Teach.” His idea was simple but radical for the time: instead of writing notes as a loose narrative, clinicians should organize every entry around a specific problem and follow a consistent structure.
That structure became SOAP. Each patient problem gets its own SOAP note, so a visit addressing both knee pain and high blood pressure would produce two separate entries, each walking through all four sections. This problem-by-problem approach makes it far easier for another provider to pick up the chart later and understand exactly what was happening, what was found, and what was decided.
S: What the Patient Reports
The Subjective section captures everything the patient tells the clinician. This is the patient’s own account of what’s going on: what hurts, when it started, what makes it better or worse, and how it affects daily life. It also includes relevant medical history the patient shares, such as past surgeries, medications they’re taking, allergies, or family health patterns.
If someone walks in with a headache, the Subjective section might note that the pain started three days ago, feels like pressure behind the eyes, gets worse in bright light, and hasn’t responded to over-the-counter painkillers. None of this can be independently verified by the clinician. It’s the patient’s perspective, and it’s recorded as such. That distinction matters because it separates what someone feels from what a provider can measure, which is the next section’s job.
O: What the Clinician Measures
The Objective section is for facts that can be observed, tested, or verified. This includes vital signs like blood pressure, heart rate, temperature, and weight. It also covers findings from a physical exam (swelling, tenderness, range of motion) and results from any lab work, imaging, or diagnostic tests done during the visit.
For that same headache patient, the Objective section might read: blood pressure 135/77, pulse 59, temperature 97.9°F, no swelling or tenderness on palpation of the sinuses, pupils equal and reactive to light. If the provider ordered blood work or a scan, those results land here too. The key rule is that everything in this section is measurable or directly observable. A patient saying “I feel dizzy” goes in Subjective. The clinician observing that the patient sways when standing with eyes closed goes in Objective.
A: The Clinician’s Interpretation
The Assessment section is where the clinician takes the information from the first two sections and makes sense of it. This is the diagnosis, or if a clear diagnosis isn’t possible yet, a ranked list of the most likely explanations. Clinicians call this a differential diagnosis: essentially, “here are the conditions that could explain what we’re seeing, in order of probability.”
The Assessment also notes whether a known condition is getting better, getting worse, or staying the same. For a patient being treated for diabetes, for example, this section might state that blood sugar control has improved since the last visit based on new lab results. For a new problem, it might say something like “tension headache, likely related to reported stress and sleep disruption; migraine less likely given absence of nausea or aura.” This is the section that shows the clinician’s reasoning, not just their conclusion.
P: What Happens Next
The Plan section lays out the next steps for each problem. It typically covers several categories: any additional tests that need to be ordered and why, changes to treatment or therapy, referrals to specialists, and instructions given to the patient. Patient education falls here too, such as advice about lifestyle changes, warning signs to watch for, or exercises to do at home.
The Plan also sets a timeline. It might note a follow-up appointment in two weeks, a request to return sooner if symptoms worsen, or goals for the patient to work toward before the next visit. For clinicians reading the chart later, this section answers the most practical question: what was supposed to happen after this encounter?
Why Healthcare Uses This Format
The biggest advantage of SOAP notes is consistency. When every provider follows the same structure, anyone picking up a patient’s chart can find specific information quickly. A pharmacist checking for drug interactions knows to look at the Plan. A specialist reviewing a referral can scan the Assessment to understand the referring provider’s reasoning. An insurance reviewer can match the documented findings in the Objective section against the treatment being billed.
SOAP notes also serve as legal documents. In malpractice cases or insurance disputes, the medical record is the primary evidence of what happened during a visit. The structured format makes it harder to leave gaps. If the Subjective section says a patient reported chest pain but the Objective section doesn’t document any cardiac exam findings, that absence is immediately visible, and that visibility pushes clinicians to be thorough.
The format also helps clinicians think more clearly. Writing a SOAP note forces a provider to separate what the patient said from what they observed, form a reasoned interpretation, and commit to a plan. That deliberate progression from data to analysis to action mirrors good clinical reasoning, which is exactly what Dr. Weed intended when he designed it.
Who Uses SOAP Notes
SOAP notes started in medicine but spread far beyond it. Physical therapists, occupational therapists, speech-language pathologists, psychologists, social workers, and counselors all use variations of the format. In mental health settings, the Objective section might focus on observed behavior, mood, and affect rather than vital signs. In physical therapy, it often centers on range-of-motion measurements, strength tests, and functional abilities.
The format adapts well because its underlying logic is universal: gather information, record observations, interpret what you’re seeing, and decide what to do about it. Some fields modify the sections slightly or emphasize different elements, but the four-part structure remains recognizable across disciplines.
Common Mistakes in SOAP Notes
The most frequent error is putting information in the wrong section. Recording a patient’s self-reported pain level in the Objective section, for instance, blurs the line between what the patient says and what the clinician can verify. Another common mistake is writing an Assessment that simply restates the Subjective and Objective findings without adding any interpretation. The Assessment should reflect clinical judgment, not just summarize what came before it.
Vague Plans also cause problems. Writing “continue current treatment” without specifying what that treatment is or when the patient should return leaves the next provider guessing. The best SOAP notes are specific enough that a completely different clinician could read the entry and know exactly what’s going on, what was tried, and what should happen next.