ICD-10 Chapter XXII: Codes for special purposes

ICD-10 chapters
Chapter Block Title
I A00–B99 Certain infectious and parasitic diseases
II C00–D48 Neoplasms
III D50–D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
IV E00–E90 Endocrine, nutritional and metabolic diseases
V F00–F99 Mental and behavioural disorders
VI G00–G99 Diseases of the nervous system
VII H00–H59 Diseases of the eye and adnexa
VIII H60–H95 Diseases of the ear and mastoid process
IX I00–I99 Diseases of the circulatory system
X J00–J99 Diseases of the respiratory system
XI K00–K93 Diseases of the digestive system
XII L00–L99 Diseases of the skin and subcutaneous tissue
XIII M00–M99 Diseases of the musculoskeletal system and connective tissue
XIV N00–N99 Diseases of the genitourinary system
XV O00–O99 Pregnancy, childbirth and the puerperium
XVI P00–P96 Certain conditions originating in the perinatal period
XVII Q00–Q99 Congenital malformations, deformations and chromosomal abnormalities
XVIII R00–R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
XIX S00–T98 Injury, poisoning and certain other consequences of external causes
XX V01–Y98 External causes of morbidity and mortality
XXI Z00–Z99 Factors influencing health status and contact with health services
XXII U00–U99 Codes for special purposes

This is a shortened version of the twentieth-two chapter of the ICD-10: Codes for special purposes. It covers ICD codes U04 to U09.9. All versions of the ICD-10, including the most recent one (2019), can be browsed freely on the website of the World Health Organisation (WHO). The ICD-10 can also be downloaded in PDF-form.

Provisional assignment of new diseases of uncertain etiology or emergency use (U00-U49)Edit

Codes U00 to U49 are placeholder codes. Their existence within the ICD allows system developers to build them into encoder software. They are not intended for local adaptation or interpretation. Until WHO assigns the code to an emerging disease, it should not be used.

In 2019, U07.0 was assigned to "Vaping-related disorder".[2] On 31 January 2020, after an emergency WHO meeting, U07.1 was assigned to deaths from lab-confirmed SARS-CoV-2 infection[3] and in March 2020, U07.2 was assigned to deaths from clinically or epidemiologically diagnosed COVID-19 without lab-confirmed SARS-CoV-2 infection.[4][5]

Resistance to antimicrobial and antineoplastic drugs (U82-U85)Edit


  1. ^ "U00-U49 – ICD-10 Version:2019". World Health Organization. 2019. Retrieved 4 April 2020.
  2. ^ "New ICD-10-CM code for vaping-related disorder to be implemented April 1, 2020" (PDF). Centers for Disease Control and Prevention. 12 September 2019.
  3. ^ "New ICD-10-CM code for the 2019 Novel Coronavirus (COVID-19), April 1, 2020" (PDF). Centers for Disease Control and Prevention. 18 March 2020.
  4. ^ "List of Official ICD-10 Updates". World Health Organization. COVID-19 update for ICD-10. Retrieved 3 April 2020.
  5. ^ "U07.1 – ICD-10 Version:2019". World Health Organization. 2019. Archived from the original on 31 March 2020. Retrieved 31 March 2020. U07.2 – COVID-19, virus not identified – COVID-19 NOS – Use this code when COVID-19 is diagnosed clinically or epidemiologically but laboratory testing is inconclusive or not available. Use additional code, if desired, to identify pneumonia or other manifestations