COVID Identification in primary care - exposure to disease

Coding system
CTV3 (Read V3)
Codelist ID

  • 2020-06-23


Codes indicating exposure to COVID-19 (1 of 13 possible types of CTV3 codes that contain information related to COVID-19)


Search of TPP CTV3 codes for terms relating to coronavirus, with additional (manual) check for any missing terms against the SNOMED list of COVID-19 related codes. Classification as "exposure to disease" was then performed following review of terms by six OpenSAFELY team members (including epidemiologists, clinicians, statisticians and infectious disease modellers).


Signed off by

  • Kevin Wing, (June 23, 2020)
  • Alex Walker, (June 23, 2020)
CTV3ID CTV3PreferredTermDesc
Y20ce Exposure to severe acute respiratory syndrome coronavirus 2 infection (event)
Y229e Close exposure to severe acute respiratory syndrome coronavirus 2 infection (event)
XaaNr Coronavirus contact
Y245c Exposure to confirmed case of severe acute respiratory syndrome coronavirus 2 infection (event)
Y245d Exposure to suspected case of severe acute respiratory syndrome coronavirus 2 infection (event)
Y246d Recently performed a healthcare related procedure (event)
Y257d Recently performed an endotracheal intubation (event)
Y257e Recently performed an extubation of trachea (event)
Y257f Recently performed an incision of trachea (event)
Y257c Recently performed an emergency tracheostomy (event)
Y258b Recently performed an insertion of tracheostomy tube (event)
Y254f Recently performed a removal of tracheostomy tube (event)
Y254d Recently performed a percutaneous tracheostomy (event)
Y252d Recently performed a change of tracheostomy tube (event)
Y254c Recently performed a percutaneous dilational tracheostomy (event)
Y251d Recently performed a bronchoscopy (event)
Y253f Recently performed a gastroscopy with open suctioning of respiratory tract (event)
Y254e Recently performed a post-mortem procedure (event)
Y256e Recently performed administration of non-invasive ventilation (event)
Y255e Recently performed administration of bi-level positive airway pressure ventilation (event)
Y255f Recently performed administration of continuous positive airway pressure ventilation (event)
Y256a Recently performed administration of high frequency oscillatory ventilation (event)
Y256b Recently performed administration of high-flow nasal cannula oxygen therapy (event)
Y257a Recently performed administration of pressurised humidified oxygen therapy (event)
Y258a Recently performed an induction of sputum procedure (event)
Y255a Recently performed a respiratory physiotherapy procedure (event)
Y253e Recently performed a dysphagia assessment (event)
Y258f Recently performed mobilisation with intent to cause cough (event)
Y256d Recently performed administration of nitrous oxide and oxygen gas analgesia (event)
Y256c Recently performed administration of medication via nebuliser (event)
Y258c Recently performed chest compressions (event)
Y253d Recently performed a direct current defibrillation procedure (event)
Y256f Recently performed administration of oxygen by Venturi mask (event)
Y259c Recently performed oxygen administration by non-rebreather mask (event)
Y258d Recently performed insertion of Guedel airway (event)
Y259a Recently performed oxygen administration by mask (event)
Y259b Recently performed oxygen administration by mask with bag and valve (event)
Y257b Recently performed an airway suctioning procedure (event)
Y255b Recently performed a throat examination using tongue depressor (event)
Y254a Recently performed a lung recruitment manoeuvre (event)
Y254b Recently performed a nasopharyngeal swab procedure (event)
Y258e Recently performed insertion of nasogastric tube (event)
Y259d Recently performed removal of nasal foreign body (event)
Y253c Recently performed a dental ultrasonic scaling procedure (event)
Y253b Recently performed a dental sonic scaling procedure (event)
Y252e Recently performed a dental air polishing procedure (event)
Y252f Recently performed a dental air-water syringing procedure (event)
Y255d Recently performed a tooth preparation procedure using air turbine handpiece (event)
Y255c Recently performed a tooth preparation procedure using air abrasion (event)
Y253a Recently performed a dental scale and polish procedure (event)
Y246e Recently worked in a healthcare setting (event)
Y25a4 Recently worked in an intensive care setting (event)
Y259f Recently worked in a hospital emergency care setting (event)
Y25a3 Recently worked in an inpatient care setting (event)
Y25a2 Recently worked in an ambulance service care setting (event)
Y25a0 Recently worked in a primary care setting (event)
Y259e Recently worked in a community social care setting (event)
Y25a1 Recently worked in a residential care setting (event)

Codes not in the full codelist are in faint grey.