Synthroid
RxNorm Crosswalk NDC 66336-342

View RxNorm Concepts, RxCUIs, and Term Type mappings for this NDC

RxNorm Mapping Clinical Concepts

This drug is included in the RxNorm Current Prescribable Content, a subset of RxNorm that includes all drugs available for prescription in the United States.

The product Synthroid (NDC 66336-342) is cross-mapped to the RxNorm terminology system to ensure clinical interoperability. This product is associated with 6 unique RxNorm concepts. By anchoring Dispensing Solutions, Inc.'s product data to these standardized identifiers, healthcare systems can maintain accurate medication records, safely automate e-prescribing, and streamline pharmacy workflows.

The following clinical concept cards detail the semantic term types (TTY), prescribable names, and synonymous clinical strings as defined by the National Library of Medicine (NLM).

PSN
SYNTHROID 25 mcg Oral Tablet
PSN
SYNTHROID 75 mcg Oral Tablet
SCD
Levothyroxine sodium 0.025 mg Oral Tablet
SCD
Levothyroxine sodium 0.075 mg Oral Tablet
SCD
Levothyroxine sodium 0.088 mg Oral Tablet
PSN
SYNTHROID 88 mcg Oral Tablet
PSNPrescribable
Featured Concept

SYNTHROID 25 MCG Oral Tablet
(RxCUI 966158)

Prescribable Name

Prescribable Name: The standardized name preferred by electronic prescribing (eRx) applications for display.

Mapped Terms
SBDPrescribable
levothyroxine sodium 0.025 MG Oral Tablet [Synthroid]
Semantic Branded Drug
Ingredient + Strength + Dose Form + Brand Name
SYPrescribable
Synthroid 0.025 MG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
SYPrescribable
Synthroid 25 MCG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
PSNPrescribable
Featured Concept

SYNTHROID 75 MCG Oral Tablet
(RxCUI 966171)

Prescribable Name

Prescribable Name: The standardized name preferred by electronic prescribing (eRx) applications for display.

Mapped Terms
SBDPrescribable
levothyroxine sodium 0.075 MG Oral Tablet [Synthroid]
Semantic Branded Drug
Ingredient + Strength + Dose Form + Brand Name
SYPrescribable
Synthroid 0.075 MG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
SYPrescribable
Synthroid 75 MCG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
SCDPrescribable
Featured Concept

levothyroxine sodium 0.025 MG Oral Tablet
(RxCUI 966220)

Semantic Clinical Drug

Semantic Clinical Drug: The clinical gold standard representing the Generic Name + Strength + Dosage Form.

Mapped Terms
PSNPrescribable
levothyroxine sodium 25 MCG Oral Tablet
Prescribable Name
Synonym of another TTY, given for clarity and for display purposes in electronic prescribing applications. Only one PSN per concept.
SYPrescribable
levothyroxine sodium 25 MCG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
SCDPrescribable
Featured Concept

levothyroxine sodium 0.075 MG Oral Tablet
(RxCUI 966222)

Semantic Clinical Drug

Semantic Clinical Drug: The clinical gold standard representing the Generic Name + Strength + Dosage Form.

Mapped Terms
PSNPrescribable
levothyroxine sodium 75 MCG Oral Tablet
Prescribable Name
Synonym of another TTY, given for clarity and for display purposes in electronic prescribing applications. Only one PSN per concept.
SYPrescribable
levothyroxine sodium 75 MCG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
SCDPrescribable
Featured Concept

levothyroxine sodium 0.088 MG Oral Tablet
(RxCUI 966253)

Semantic Clinical Drug

Semantic Clinical Drug: The clinical gold standard representing the Generic Name + Strength + Dosage Form.

Mapped Terms
PSNPrescribable
levothyroxine sodium 88 MCG Oral Tablet
Prescribable Name
Synonym of another TTY, given for clarity and for display purposes in electronic prescribing applications. Only one PSN per concept.
SYPrescribable
levothyroxine sodium 88 MCG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
PSNPrescribable
Featured Concept

SYNTHROID 88 MCG Oral Tablet
(RxCUI 966282)

Prescribable Name

Prescribable Name: The standardized name preferred by electronic prescribing (eRx) applications for display.

Mapped Terms
SBDPrescribable
levothyroxine sodium 0.088 MG Oral Tablet [Synthroid]
Semantic Branded Drug
Ingredient + Strength + Dose Form + Brand Name
SYPrescribable
Synthroid 0.088 MG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.
SYPrescribable
Synthroid 88 MCG Oral Tablet
Synonym
Synonym of another TTY, given for clarity.

Understanding RxNorm Mapping for Synthroid

RxNorm is a normalized naming system developed by the National Library of Medicine (NLM) to bridge the gap between different drug terminologies. By mapping NDC 66336-342 to RxCUI 966158, 966171, 966220, 966222, 966253, 966282, this page provides the standardized "source of truth" required for hospital systems, e-prescribing software, and pharmacy benefit managers (PBMs) to communicate without errors.

Term Type (TTY) Legend for This Page

The clinical cards above utilize specific Term Types (TTY) to define the granularity of the drug concept:

  • PSN Prescribable Name: The standardized name preferred by electronic prescribing (eRx) applications for display.
  • SBD Semantic Branded Drug: The branded equivalent representing the Brand Name + Strength + Dosage Form.
  • SY Synonym: An alternative clinical name or alias provided for search and retrieval clarity.
  • SCD Semantic Clinical Drug: The clinical gold standard representing the Generic Name + Strength + Dosage Form.

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