UMLS · { · C1658905

C1658905

{7 (lamotrigine 100 MG Oral Tablet [Lamictal]) / 42 (lamotrigine 25 MG Oral Tablet [Lamictal]) } Pack [Lamictal Orange (For Patients Not Taking Carbamazepine, Phenytoin, Phenobarbital, Primidone, or Rifampin and Not Taking Valproate)]

Concept

CUIC1658905

Preferred{7 (lamotrigine 100 MG Oral Tablet [Lamictal]) / 42 (lamotrigine 25 MG Oral Tablet [Lamictal]) } Pack [Lamictal Orange (For Patients Not Taking Carbamazepine, Phenytoin, Phenobarbital, Primidone, or Rifampin and Not Taking Valproate)]

Cross-maps

RxNorm795774

Source vocabularies

Atoms not loaded for this concept.

Related concepts

C5203202 {1 (0.1 ML) (diazepam 100 MG/ML Nasal Spray [Valtoco]) } Pack [Valtoco 10 MG Dose Kit]

C5228600 {1 (0.1 ML) (diazepam 100 MG/ML Nasal Spray) } Pack

C5228394 {1 (0.1 ML) (diazepam 50 MG/ML Nasal Spray [Valtoco]) } Pack [Valtoco 5 MG Dose Kit]

C5228602 {1 (0.1 ML) (diazepam 50 MG/ML Nasal Spray) } Pack

C0976534 {1 (0.35 ML chondroitin sulfates 40 MG/ML / sodium hyaluronate 30 MG/ML Prefilled Syringe [Viscoat]) / 1 (0.4 ML sodium hyaluronate 10 MG/ML Prefilled Syringe [Provisc]) } Pack [Duovisc Kit 0.35/0.4]

C2242424 {1 (0.35 ML chondroitin sulfates 40 MG/ML / sodium hyaluronate 30 MG/ML Prefilled Syringe) / 1 (0.4 ML sodium hyaluronate 10 MG/ML Prefilled Syringe) } Pack

# same page, as API
GET autoicdapi.com/api/v1/reference/umls/C1658905
GET autoicdapi.com/api/v1/translate?code=C1658905&from=umls&to=snomed-ct

Common questions

What is the UMLS CUI for {7 (lamotrigine 100 MG Oral Tablet [Lamictal]) / 42 (lamotrigine 25 MG Oral Tablet [Lamictal]) } Pack [Lamictal Orange (For Patients Not Taking Carbamazepine, Phenytoin, Phenobarbital, Primidone, or Rifampin and Not Taking Valproate)]?

What is UMLS code C1658905?

C1658905 is the UMLS identifier for {7 (lamotrigine 100 MG Oral Tablet [Lamictal]) / 42 (lamotrigine 25 MG Oral Tablet [Lamictal]) } Pack [Lamictal Orange (For Patients Not Taking Carbamazepine, Phenytoin, Phenobarbital, Primidone, or Rifampin and Not Taking Valproate)]. It is included in the current NLM UMLS Metathesaurus release.

What is the RxNorm mapping for C1658905?

C1658905 maps to RxNorm 795774.

UMLS, plainly answered

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 /api/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.