AMA specifies in
https://www.ama-assn.org/system/files/2019-06/cpt-office-prolonged-svs-code-changes.pdf
History and/or Examination
Office or other outpatient services include a medically appropriate history and/or physical examination, when performed. The nature and extent of the history and/or physical examination are determined by the treating physician or other qualified health care professional reporting the service. The care team may collect information and the patient or caregiver may supply information directly (eg, by electronic health record[EHR] portal or questionnaire) that is reviewed by the reporting physician or other qualified health care professional. The extent of history and physical examination is not an element in selection of the level of office or other outpatient codes.
To me, this means I do not even need to look at the exam or history to code 99202-99215. It even specifies "when performed." It is completely at the clinician's discretion what needs to be examined or not examined. So even no vitals could be a medically appropriate examination.