Venous thromboembolism (past) by type - secondary care and mortality data Draft



Coding system
ICD-10
Organisation
OpenSAFELY
Codelist ID
opensafely/venous-thromboembolism-past-by-type-secondary-care-and-mortality-data
ID
4402fca7

Versions
  • 4402fca7 Draft

Description

ICD-10 codelist for any history of venous thromboembolism.

This differs from the existing OpenSAFELY codelist incident VTE by including codes that specify the event occured during pregnancy or post partum, and post thrombotic syndrome, and by further clarifying type (site) of VTE.

Methodology

Aim

Codelist to identify people with a history of VTE (in any context including while pregnant).

Search

(1) Identified existing ICD-10 codelists in the OpenSAFELY database for VTE (a) https://codelists.opensafely.org/codelist/opensafely/venous-thromboembolism-icd-10/6e25de26/#full-list (b) https://codelists.opensafely.org/codelist/opensafely/venous-thromboembolic-disease-hospital/2020-10-01/#full-list The second (b) includes all codes in (a) and additionally codes for VTE in unspecified sites, which we'd want to include here. Neither includes any codes relating to pregnancy or postpartum, which we would want to include for a full capture of 'a history of VTE' (c) There's also a codelist specifically for cerebral venous thrombosis which includes CVT from all causes (inc pregnancy, post partum and in the context of sepsis https://codelists.opensafely.org/codelist/opensafely/cerebral-venous-thrombosis-secondary-care-or-mortality/43b72958/ and has been discussed with MHRA and PHE

(2) Searched for existing validated codelists and found list by Sultan et al (reference below).

(3) New search in WHO browser (2019 version) to check for any further codes to consider.

Approach:

Based codelist on validated codelist by Sultan et al, with additions of - cerebral venous thrombosis codes - post thrombotic syndrome (since we are interested in a history of VTE not incidence) - events specified as in pregnancy or postpartum. - 3-character codes I80, I81 and I26 as all subtypes relevant (other than I800 for superficial thrombosis nested below I80)

Categorised by site aiming for as much consistency as possible with CTV3 codelist https://codelists.opensafely.org/codelist/opensafely/vte-classified-codes/08b94f7d/

Discussion on Github https://github.com/opensafely/codelist-development/issues/92

References

Signed off by

  • Helen McDonald, (April 26, 2021)
  • Anna Schultze, (April 26, 2021)
code term type
O225 Cerebral venous thrombosis in pregnancy cvt
O873 Cerebral venous thrombosis in the puerperium cvt
G08 Intracranial and intraspinal phlebitis and thrombophlebitis cvt
I636 Cerebral infarction due to cerebral venous thrombosis, nonpyogenic cvt
I676 Nonpyogenic thrombosis of intracranial venous system cvt
I80 Phlebitis and thrombophlebitis dvt
I801 Phlebitis and thrombophlebitis of femoral vein dvt
I802 Phlebitis and thrombophlebitis of other deep vessels of lower extremities dvt
I803 Phlebitis and thrombophlebitis of lower extremities, unspecific dvt
O223 Deep phlebothrombosis in pregnancy dvt
O871 Deep phlebothrombosis in the puerperium dvt
I820 Budd-Chiari syndrome hepatic
I26 Pulmonary embolism pe
I260 Pulmonary embolism with mention of acute cor pulmonale pe
I269 Pulmonary embolism without mention of acute cor pulmonale pe
O082 Embolism following abortion and ectopic and molar pregnancy pe
O882 Obstetric blood-clot embolism pe
I81 Portal vein thrombosis portal
I823 Embolism and thrombosis of renal vein renal
I808 Phlebitis and thrombophlebitis of other sites unspecified
I809 Phlebitis and thrombophlebitis of unspecified site unspecified
I82 Other venous embolism and thrombosis unspecified
I821 Thrombophlebitis migrans unspecified
I828 Embolism and thrombosis of other specified veins unspecified
I829 Embolism and thrombosis of unspecified vein unspecified
I870 Postthrombotic syndrome unspecified
I822 Embolism and thrombosis of vena cava vc

Codes not in the full codelist are in faint grey.