Supported Sources

Medical Terminology for Data Science is built around UMLS-backed source vocabularies.

Local database contents are UMLS-release specific. A recent local build includes these core sources:

Source	Primary use	Verified active codes
ICD10CM	diagnosis coding	98,506
ICD10PCS	inpatient procedure coding	192,560
SNOMEDCT_US	clinical concepts and hierarchy	386,110
RXNORM	medications and RxCUIs	124,919
LNC	LOINC labs and observations	301,558
CVX	vaccines	288
CPT	procedures	15,468
HCPCS	procedures, supplies, drugs	7,685

Regenerate counts for your build with:

medterm4ds data verify \
  --db /mnt/d/medterm4ds/data/umls_current.duckdb \
  --sources ICD10CM,ICD10PCS,SNOMEDCT_US,RXNORM,LNC,CVX,CPT,HCPCS

Supported operations vary by source because UMLS coverage differs by vocabulary. Lookup and search are broad. Mapping, hierarchy, obsolete-code handling, and patient-friendly naming depend on available atoms, relationships, and attributes.