Coding Standards
ICD-11
WHO's 2022 successor to ICD-10, with stem codes, post-coordination via extension codes, and a digital-first specification.
Definition
ICD-11 is the World Health Organization's 11th revision of the International Classification of Diseases, adopted by the World Health Assembly in May 2019 and effective for member-state reporting starting January 1, 2022. Unlike ICD-10, ICD-11 was designed digital-first: every concept has a stable URI, the spec is API-accessible, and post-coordination (combining a stem code with extension codes for severity, laterality, anatomical detail, etc.) is a first-class mechanism.
Concept counts are not directly comparable to ICD-10, because ICD-11 splits content between stem codes (~17,000) and extension codes that elaborate them. Chapter structure is also reorganized: immune-system disorders, sleep-wake disorders, and conditions related to sexual health each got their own chapters.
U.S. clinical claims still require ICD-10-CM. ICD-11 adoption in the U.S. is currently focused on research, mortality coding (NCHS is migrating cause-of-death reporting), and select EHR vendors. The WHO offers an official ICD-10-to-ICD-11 mapping (currently pre-mortality, with a separate morbidity table due in 2025).
When to use
- •Sites operating outside the U.S. that have already migrated to ICD-11.
- •Research workflows that need a globally comparable classification.
- •Mortality reporting and global health analytics.
Try it in AutoICD API
Cross-walk an ICD-10 code to ICD-11
curl -X POST https://autoicdapi.com/v1/translate \
-H "Authorization: Bearer $AUTOICD_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"code": "I10",
"from": "icd10",
"to": "icd11"
}'Language: bash. View full API docs · Get an API key.