This value set includes codes based on the following rules:

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20201026

  Code	Display
  21522001	Abdominal pain
  197270009	Acute liver insufficiency or failure
  236424009	Acute renal impairment or insufficiency
  419284004	Altered mental status
  301770000	Aseptic meningitis
  249366005	Bloody nose
  34436003	Blood in urine
  281102003	Blood in vomit
  698247007	Cardiac arrhythmia
  29857009	Chest pain
  1003611001	Conjunctival suffusion
  49727002	Cough
  62315008	Diarrhea
  267036007	Shortness of breath or dyspnea
  302227002	Ecchymosis
  707724006	Acutely elevated liver enzymes
  386661006	Fever measured or patient reported
  25064002	Headache
  405729008	Blood in stool
  66857006	Coughing blood
  26165005	Elevated bilirubin
  18165001	Jaundice
  57676002	Joint pain
  111583006	Leukocytosis
  279039007	Lower back pain
  247471006	Maculopapular eruption
  68962001	Myalgia
  422587007	Nausea
  83128009	Oliguria
  300954003	Calf pain
  41652007	Eye pain
  50091001	Petechiae
  423716004	Petechial rash
  409668002	Photophobia
  409674002	Elevated PT/PTT
  78144005	Pulmonary hemorrhage
  409622000	Respiratory failure
  27942005	Shock
  302215000	Thrombocytopenia
  422400008	Vomiting

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  OTH	Other clinical manifestation (specify)
  UNK	unknown

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/umls version 20201026

  Code	Display
  C0743724	Retro-orbital pain