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Automating UMLS Terminology Services Downloads


Download any RxNorm, SNOMED CT, or UMLS release using our download API.


Step 1: Get your API key from your UTS profile.

Step 2: Find the URL for the file you want to download and send a request. Examples:


Download RxNorm Weekly Updates

https://uts-ws.nlm.nih.gov/download
?url=https://download.nlm.nih.gov/umls/kss/rxnorm/RxNorm_weekly_10052022.zip
&apiKey=YOUR_API_KEY

curl example:

curl "https://uts-ws.nlm.nih.gov/download?url=https://download.nlm.nih.gov/umls/kss/rxnorm/RxNorm_weekly_10052022.zip&apiKey=YOUR_API_KEY" -o RxNorm_weekly_10052022.zip

Download the US Edition of SNOMED CT

https://uts-ws.nlm.nih.gov/download
?url=https://download.nlm.nih.gov/mlb/utsauth/USExt/SnomedCT_USEditionRF2_PRODUCTION_20220901T120000Z.zip
&apiKey=YOUR_API_KEY

curl example:

curl "https://uts-ws.nlm.nih.gov/download?url=https://download.nlm.nih.gov/mlb/utsauth/USExt/SnomedCT_USEditionRF2_PRODUCTION_20220901T120000Z.zip&apiKey=YOUR_API_KEY" -o SnomedCT_USEditionRF2_PRODUCTION_20220901T120000Z.zip

Download the UMLS Release

https://uts-ws.nlm.nih.gov/download
?url=https://download.nlm.nih.gov/umls/kss/2022AA/umls-2022AA-full.zip
&apiKey=YOUR_API_KEY

curl example:

curl "https://uts-ws.nlm.nih.gov/download?url=https://download.nlm.nih.gov/umls/kss/2022AA/umls-2022AA-full.zip&apiKey=YOUR_API_KEY" -o umls-2022AA-full.zip