IADR Abstract Archives
A Comparison of Representative Dental Disease Codes between ICD-10 and ICD-11
Objectives: The 11th Revision of International Disease Classification (ICD - 11) was released in 2018. ICD-11 has a content model that describes comprehensive disease concepts with symptoms and causes. Newly introduced extension codes (X chapter), which have been designed to standardize the way additional detail information: anatomic site, severity and time axis, is added to stem codes, provide a more detailed disease explanation than ICD-10. ICD-11 is expected to be useful also in dentistry for statistical, clinical, and research purposes. In this study, we compared the characteristics of the ICD-10 and ICD-11 for typical dental diagnostic terms classified as code K (digestive disease) in ICD-10.
Methods: We searched how minimum codes (K00 to K14) of dental and oral diseases in ICD-10 have changed in ICD-11 using ICD-11 web browser and ICD-10/11 mapping tables released as of March 12, 2019 (https://icd.who.int/browse11/l-m/en). We compared the correspondence of terms and codes in ICD -10 and ICD-11 for 666 dental diagnostic terms (K code) used in the Health Care Insurance System in Japan.
Results: In ICD-10, dentistry diagnostic terms of code K included 14 categories, while in ICD-11 these are encoded in 24 categories. Gum and periodontal diseases are classified in a category K05 of ICD-10, while they are divided into DA0B “Gingival diseases” and DA0C “Periodontal disease" in ICD-11. K02 “Dental Caries” and K03 “Other disease of hard tissues of teeth” in ICD-10 are aggregated into a category DA08 “Diseases of hard tissues of teeth” in ICD-11 and stages of tooth decay are not categorized. In ICD-10 there were 21 cases where terms and ICD codes corresponded one-to-one. This decreased to 14 in ICD-11. Cementum caries is coded with K022 of ICD-10 and DA08.0 of ICD-11, but DA08.0 applies also to 17 other caries related terms. Extensions coded such as XA4KC7 (cementum) and XA5R09 (enamel) enable representation of the progression of caries. Furthermore, by using extension code XT44 (secondary), ICD-11 enables representation of the secondary caries which was not distinguished from primary caries in ICD-10.
Conclusions: The number of chapters in ICD-11 for typical dental diagnostic terms increased, however the number of cases where terms and ICD codes corresponded one-to-one decreased. Using extension codes suggest being effective for representation several terms. We need to examine other dental terms in ICD-10 and consider the specific rules of using extension codes.
Methods: We searched how minimum codes (K00 to K14) of dental and oral diseases in ICD-10 have changed in ICD-11 using ICD-11 web browser and ICD-10/11 mapping tables released as of March 12, 2019 (https://icd.who.int/browse11/l-m/en). We compared the correspondence of terms and codes in ICD -10 and ICD-11 for 666 dental diagnostic terms (K code) used in the Health Care Insurance System in Japan.
Results: In ICD-10, dentistry diagnostic terms of code K included 14 categories, while in ICD-11 these are encoded in 24 categories. Gum and periodontal diseases are classified in a category K05 of ICD-10, while they are divided into DA0B “Gingival diseases” and DA0C “Periodontal disease" in ICD-11. K02 “Dental Caries” and K03 “Other disease of hard tissues of teeth” in ICD-10 are aggregated into a category DA08 “Diseases of hard tissues of teeth” in ICD-11 and stages of tooth decay are not categorized. In ICD-10 there were 21 cases where terms and ICD codes corresponded one-to-one. This decreased to 14 in ICD-11. Cementum caries is coded with K022 of ICD-10 and DA08.0 of ICD-11, but DA08.0 applies also to 17 other caries related terms. Extensions coded such as XA4KC7 (cementum) and XA5R09 (enamel) enable representation of the progression of caries. Furthermore, by using extension code XT44 (secondary), ICD-11 enables representation of the secondary caries which was not distinguished from primary caries in ICD-10.
Conclusions: The number of chapters in ICD-11 for typical dental diagnostic terms increased, however the number of cases where terms and ICD codes corresponded one-to-one decreased. Using extension codes suggest being effective for representation several terms. We need to examine other dental terms in ICD-10 and consider the specific rules of using extension codes.
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