21543000
disorderAcute actinic otitis externa
Concept
FSNAcute actinic otitis externa (disorder)
PreferredAcute actinic otitis externa
StatusActive
Effective20020131
Synonyms
No additional synonyms recorded.
# same page, as API
GET autoicdapi.com/api/v1/reference/snomed-ct/21543000
GET autoicdapi.com/api/v1/translate?code=21543000&from=snomed&to=icd-10
Common questions
What is the SNOMED CT code for Acute actinic otitis externa?
Acute actinic otitis externa is coded as 21543000 in SNOMED CT.
What is SNOMED CT code 21543000?
21543000 is the SNOMED CT identifier for Acute actinic otitis externa. It is included in the most recent US Edition release of SNOMED CT.
What semantic tag does SNOMED CT 21543000 have?
21543000 is classified as a disorder in SNOMED CT.
What is the ICD-10-CM mapping for 21543000?
What is the UMLS mapping for 21543000?
21543000 maps to UMLS C0271421.
SNOMED CT, plainly answered
What is SNOMED CT?
SNOMED CT is the world's most comprehensive clinical terminology, with around 350,000 active concepts covering diseases, findings, procedures, body structures, and substances. It is the recommended terminology for EHR problem lists in many countries.
How does SNOMED CT relate to ICD-10?
SNOMED CT describes clinical meaning. ICD-10 (and ICD-10-CM) describes billing categories. The SNOMED to ICD-10-CM map (maintained by NLM) gives one or more ICD codes per SNOMED concept. We expose those mappings on each concept page and through the cross_references field on the API.
Is the API free to use?
Browsing the directory is free for anyone with a browser. Programmatic access (the /api/v1/reference/snomed-ct/* endpoints) needs an API key. Free tier covers low-volume hobby use; paid tiers cover production traffic.
How do I look up a SNOMED concept?
Either type the ID or a term into the search bar above, or call GET /api/v1/reference/snomed-ct/{concept_id}. Both paths return the same data: FSN, preferred term, semantic tag, synonyms, and cross-maps to ICD-10, ICD-11, UMLS, LOINC, and RxNorm where they exist.
How fresh is the SNOMED data?
We rebuild against the most recent US Edition release on each NLM publication cycle. Concept IDs and FSNs are stable across builds; new concepts and retirements are reflected within days of an upstream release.
Do I need a SNOMED license?
Yes for any production use. SNOMED International controls licensing through national affiliates (NLM in the US). The free tier here is for evaluation. Paid plans assume the customer holds a valid affiliate license or is using an exempted use case.