Diagnosis and Clinical Impression
Build a defensible impression
A useful diagnosis names the tissue, the mechanism, and the functional consequence-for example, "cervicogenic headache with C2–3 segmental dysfunction and work-limiting loss of cervical rotation." Exclude visceral and systemic mimics before settling: cardiac ischemia can refer to mid-back or jaw, gallbladder to the right scapula, renal disease to the flank, and an abdominal aortic aneurysm to the back in an older smoker. Consider neural tension, vascular, rheumatic, and metabolic patterns.
Reasoning discipline
Write a differential, listing both the most likely and the most dangerous possibilities, and record what finding would change your mind. Assign ICD-10 codes that match documented findings.
Traps
Anchoring on a prior diagnosis carried in from another office. Premature closure after one good response to treatment. Attributing every symptom to the spine. Offering "subluxation" as a complete diagnosis with no biomechanical or functional descriptor. Calling a condition "adjustment-responsive" instead of investigating it.
Rule of thumb
If a patient is not improving as expected by 2–4 weeks, or symptoms are progressive, atypical, bilateral, or accompanied by red flags, reopen the differential rather than intensifying the same treatment.