Carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
RxNorm 999789

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 999789 represents a standardized clinical drug concept used for cross-system interoperability. This concept aggregates multiple Atom IDs (AUIs), which are specific naming variations and synonyms used across pharmaceutical databases to ensure accurate medication mapping for: carbon dioxide 5 % / oxygen 21 % Gas for Inhalation.

The following semantic concepts and normalized strings are associated with this clinical entity:

SCD
Carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
Primary clinical definition
AUI:12329226
View
SY
Carbon dioxide 5 % / nitrogen (inactive) 74 % / oxygen 21 % Gas for Inhalation
AUI:3280951
View
PSN
Carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
AUI:6389219
View

This clinical crossover tool is designed for healthcare professionals, pharmacists, and data analysts to safely compare substitute products and manage medication interoperability.

SCDPrescribable

Semantic Clinical Drug (SCD):
Carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
(Atom ID: 12329226)

Clinical Status & Identity

Prescribable Status
YES (Active)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
N
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
999789
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12329226
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCD
Semantic Clinical Drug (Ingredient + Strength + Dose Form)
Source Code
999789
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.

Technical Attributes & Logic

RXN AVAILABLE STRENGTH
5 % / 21 %
Available drug strengths listed in the order of ingredients from the drug
RXN HUMAN DRUG
US
Drug available for use in Humans
RXTERM FORM
Gas
The RxTerm dose form name for this drug
SYPrescribable

Synonym (SY):
Carbon dioxide 5 % / nitrogen (inactive) 74 % / oxygen 21 % Gas for Inhalation
(Atom ID: 3280951)

Clinical Status & Identity

Prescribable Status
YES (Active)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
carbon dioxide 5 % / nitrogen (inactive) 74 % / oxygen 21 % Gas for Inhalation
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
N
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
999789
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
3280951
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
999789
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.
PSNPrescribable

Prescribable Name (PSN):
Carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
(Atom ID: 6389219)

Clinical Status & Identity

Prescribable Status
YES (Active)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
carbon dioxide 5 % / oxygen 21 % Gas for Inhalation
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
N
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
999789
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6389219
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
PSN
Prescribable Name (Synonym of another TTY, given for clarity and for display purposes in electronic prescribing applications. Only one PSN per concept.)
Source Code
999789
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.