UMLS · A · C1637821

C1637821

acetaminophen 325 MG / dichloralphenazone 100 MG / isometheptene 65 MG Oral Capsule

Concept
CUIC1637821
Preferredacetaminophen 325 MG / dichloralphenazone 100 MG / isometheptene 65 MG Oral Capsule
Cross-maps
SNOMED377218004
SNOMED377282007
SNOMED377283002
RxNorm606947
Source vocabularies

Atoms not loaded for this concept.

# same page, as API
GET api.autoicdapi.com/v1/reference/umls/C1637821
GET api.autoicdapi.com/v1/translate?code=C1637821&from=umls&to=snomed-ct

UMLS C1637821, plainly answered

What is UMLS code C1637821?
UMLS CUI C1637821 is "acetaminophen 325 MG / dichloralphenazone 100 MG / isometheptene 65 MG Oral Capsule".
Which terminologies does UMLS C1637821 bridge?
acetaminophen 325 MG / dichloralphenazone 100 MG / isometheptene 65 MG Oral Capsule (CUI C1637821) groups: 3 SNOMED CT concepts, 1 RxNorm code.
What SNOMED CT concept matches UMLS C1637821?
acetaminophen 325 MG / dichloralphenazone 100 MG / isometheptene 65 MG Oral Capsule corresponds to SNOMED CT concepts 377218004, 377282007, 377283002.
What is UMLS?
The Unified Medical Language System is the NLM's meta-terminology that unifies SNOMED CT, ICD-10, ICD-11, RxNorm, LOINC, MeSH, and around 200 other source vocabularies under a single concept identifier (CUI). One UMLS CUI can group dozens of synonymous codes from different terminologies.
What is a CUI and why does it matter?
A CUI is a stable identifier (like C0011860) that points at a single clinical idea regardless of how that idea is encoded in any specific vocabulary. CUIs are the most reliable way to bridge between terminologies when you need to compare or merge data from multiple sources.
How does UMLS help with cross-mapping?
Every UMLS concept page lists the codes it groups together. That gives you a free crosswalk: a SNOMED concept and an ICD-10 code that share a CUI describe the same clinical idea. Our cross_references API returns these groupings inline.
Is the API free to use?
Browsing the directory is free. Programmatic /v1/reference/umls/* access needs an API key. Production volume requires a paid tier.
How fresh is the UMLS data?
We track NLM's twice-yearly releases (May AB and November AB). Each release brings new concepts, retirements, and atom updates from the source vocabularies, and our index reflects them within the same week.
Do I need a UMLS license?
Yes. The UMLS Metathesaurus License Agreement is free but requires an NLM UTS account. Customers in production need their own license. Free-tier evaluation use is permitted under the standard terms.