Cross-Mappings
Crosswalk (Code Mapping)
A mapping table that translates codes between two classifications, e.g., ICD-10-CM to ICD-11.
Definition
A crosswalk (also called a code mapping or cross-map) is a structured table that translates codes between two classifications. Examples in healthcare include the GEMs (General Equivalence Mappings) between ICD-9-CM and ICD-10-CM, the WHO ICD-10-to-ICD-11 mapping table, and the ICD-10-CM-to-SNOMED CT map maintained inside UMLS.
Crosswalks are rarely 1:1. The WHO ICD-10-to-ICD-11 mapping uses four mapping types: equivalent (one ICD-10 maps cleanly to one ICD-11), related (close but not identical), broader (target is a parent concept), and narrower (target is a child concept). Picking the right mapping type matters: a one-way translation that drops mapping-type metadata silently loses precision.
AutoICD's translate endpoint exposes both directions of every crosswalk it ships and returns the mapping type for each candidate so consuming systems can preserve fidelity.
When to use
- •Migrating historical claims data from ICD-9-CM or ICD-10 to a new classification.
- •Building dual-coded reference data sets for analytics that span jurisdictions.
- •Showing equivalent codes in different classifications inside a clinical UI.
Try it in AutoICD API
Translate between code systems
curl -X POST https://autoicdapi.com/v1/translate \
-H "Authorization: Bearer $AUTOICD_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"code": "E11.9",
"from": "icd10",
"to": "icd11"
}'Language: bash. View full API docs · Get an API key.