This page lists specific source data elements and provides information on their representation in the UMLS Metathesaurus.
VSAB: RXNORM_20AA_240304F
RxNorm, a standardized nomenclature for clinical drugs, is produced by the National Library of Medicine. Data files are released monthly and available by download. Within each Metathesaurus cycle, RxNorm is updated multiple times. This document reflects the latest cumulative update. The scope of RxNorm is determined by the combined scope of its source vocabularies which include the following:
| Sources | Description |
|---|---|
| ATC_2024_01_19_24_03_04 | Anatomical Therapeutic Chemical Classification System |
| CVX_2024_02_15 | Vaccines Administered |
| DRUGBANK5.0_2024_02_09 | DrugBank |
| GS_2024_02_12 | Gold Standard Drug Database |
| MMSL_2024_02_01 | Multum MediSource Lexicon |
| MMX_2024_02_05 | Micromedex RED BOOK |
| MTHCMSFRF_2020_24_03_04 | Metathesaurus CMS Formulary Reference File |
| MTHSPL_2024_02_24 | Metathesaurus FDA Structured Product Labels |
| NDDF_2024_02_14 | FDB MedKnowledge |
| RXNORM_20AA_240304F | RxNorm Vocabulary |
| USP_2024_01_08_24_03_04 | USP Compendial Nomenclature |
| VANDF_2024_01_31 | Veterans Health Administration National Drug File |
Note: Selected portions of SNOMEDCT are included in the RxNorm release files, however, they are not processed as part of RxNorm for the Metathesaurus except in assigning RXCUI and RXAUI attributes. All SNOMEDCT data in the Metathesaurus comes directly from that source's data files. This document describes how the RxNorm release files (RXN*RRF) are processed for representation in the UMLS Metathesaurus. It does not cover processing of individual source vocabularies for inclusion in RxNorm.
| File Name | Description |
|---|---|
| Readme_Full_*.txt | Provides information about the contents of the downloaded zip file. Lists all updated and non-updated sources. Provides information on database control files and SQL commands for use in the automation of the loading process of these files into a RDBMS (Oracle in this case). |
| File Name | Description |
|---|---|
| RXNCONSO.RRF | Concept and source information. |
| RXNDOC.RRF | Data about RxNorm. |
| RXNREL.RRF | Relationship and merge information. |
| RXNSAB.RRF | Source information. |
| RXNSAT.RRF | Attribute information. |
| RXNSTY.RRF | Semantic type information. |
| RXNATOMARCHIVE.RRF | Archive data. Not used. |
| RXNCUICHANGES.RRF | Concept changes. Not used. |
| RXNCUI.RRF | Retired CUIs. |
RxNorm uses the Rich Release Format (RRF) of the Metathesaurus. There are some fields that are not populated by RxNorm and are marked as "(no value provided)" in the description column with "Not applicable" in the representation column. There are other fields which do contain data such as the term status field (TS) but the data is not extracted because the fields are computed during Metathesaurus production. These fields are marked as "Not processed" in the Representation column.
Also, some fields such as CODE may appear in multiple RXN RRF files. These fields are redundant and are not always used within a particular RRF file but are processed within another file.
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | RXCUI | RxNorm unique identifier for concept (concept ID) | MRCONSO.SCUI if SAB = "RXNORM"; MRSAT.ATN= "RXCUI" |
| 2 | LAT | Language of term | Not processed |
| 3 | TS | Term status | Not processed |
| 4 | LUI | Unique identifier for term (no value provided) | Not applicable |
| 5 | STT | String type | Not processed |
| 6 | SUI | Unique identifier for string (no value provided) | Not applicable |
| 7 | ISPREF | Atom status - preferred (Y) or not (N) for this string within the concept | Not processed |
| 8 | RXAUI | Unique identifier for atom (RxNorm atom ID) | MRCONSO.SAUI if SAB = "RXNORM"; MRSAT.ATN = "RXAUI" |
| 9 | SAUI | Source asserted atom identifier | MRCONSO.SAUI |
| 10 | SCUI | Source asserted concept identifier | MRCONSO.SCUI |
| 11 | SDUI | Source asserted descriptor identifier | MRCONSO.SDUI |
| 12 | SAB | Abbreviated source name | MRCONSO.SAB |
| 13 | TTY | Abbreviation for term type | MRCONSO.TTY |
| 14 | CODE | Source asserted identifier | MRCONSO.CODE |
| 15 | STR | String | MRCONSO.STR |
| 16 | SRL | Source restriction level (no value provided) | Not applicable |
| 17 | SUPPRESS | Suppressible flag | MRCONSO.SUPPRESS |
| 18 | CVF | Content view flag | Not processed |
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | KEY | Data element or attribute | MRDOC.KEY |
| 2 | VALUE | Abbreviation that is one of its values | MRDOC.VALUE |
| 3 | TYPE | Type of information in EXPL column | MRDOC.TYPE |
| 4 | EXPL | Explanation of VALUE field | MRDOC.EXPL |
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | RXCUI1 | Unique identifier of first concept | MRREL.CUI1 populated by the Metathesaurus CUI of RXAUI1 |
| 2 | RXAUI1 | Unique identifier of first atom | MRREL.AUI1 populated by the Metathesaurus AUI of RXAUI1 |
| 3 | STYPE1 | Name of the column in RXNCONSO.RRF that contains the identifier used for the first concept or first atom in source of the relationship (either 'AUI' or 'CUI') | MRREL.STYPE1 |
| 4 | REL | Relationship of second concept or atom to the first concept or atom | MRREL.REL |
| 5 | RXCUI2 | Unique identifier of second concept | MRREL.CUI2 populated by the Metathesaurus CUI of RXAUI2 |
| 6 | RXAUI2 | Unique identifier of second atom | MRREL.AUI2 populated by the Metathesaurus AUI of RXAUI2 |
| 7 | STYPE2 | Name of the column in RXNCONSO.RRF that contains the identifier used for the second concept or second atom in source of the relationship (either 'AUI' or 'CUI') | MRREL.STYPE2 |
| 8 | RELA | Additional relationship label | MRREL.RELA |
| 9 | RUI | Unique identifier of relationship (no value provided) | Not applicable |
| 10 | SRUI | Source asserted relationship identifier (no value provided) | Not applicable |
| 11 | SAB | Abbreviated source name | MRREL.SAB |
| 12 | SL | Source of relationship labels (no value provided) | Not applicable |
| 13 | RG | Relationship group | Not processed |
| 14 | DIR | Source asserted directionaltiy flag (no value provided) | Not applicable |
| 15 | SUPPRESS | Suppressible flag | MRREL.SUPPRESS |
| 16 | CVF | Content view flag | Not processed |
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | VCUI | CUI | Not processed |
| 2 | RCUI | Root CUI | Not processed |
| 3 | VSAB | Versioned source abbreviation | MRSAB.VSAB |
| 4 | RSAB | Root source abbreviation | MRSAB.RSAB |
| 5 | SON | Official name | MRSAB.SON |
| 6 | SF | Source familty | MRSAB.SF |
| 7 | SVER | Version | MRSAB.SVER |
| 8 | VSTART | Meta start date | Not processed |
| 9 | VEND | Meta end date | Not processed |
| 10 | IMETA | Meta insert version | Not processed |
| 11 | RMETA | Meta remove version | Not processed |
| 12 | SLC | Source license contact | MRSAB.SLC |
| 13 | SCC | Source content contact | MRSAB.SCC |
| 14 | SRL | Source restriction level | MRSAB.SRL |
| 15 | TFR | Term frequency | Not processed |
| 16 | CFR | CUI frequency | Not processed |
| 17 | CXTY | Context type | MRSAB.CXTY |
| 18 | TTYL | Term type list | Not processed |
| 19 | ATNL | Attribute name list | Not processed |
| 20 | LAT | Language | MRSAB.LAT |
| 21 | CENC | Character encoding | MRSAB.CENC |
| 22 | CURVER | Current version | Not processed |
| 23 | SABIN | source in subset | Not processed |
| 24 | SSN | Source short name | Not processed |
| 25 | SCIT | Source short name | MRSAB.CIT |
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | RXCUI | Unique identifier for concept (concept ID) | MRSAT.CUI populated by the Metathesarus CUI of RXCUI |
| 2 | LUI | Unique identifier for term (no value provided) | Not applicable |
| 3 | SUI | Unique identifier for string (no value provided) | Not applicable |
| 4 | RXAUI | Unique identifier for atom (RxNorm atom ID) | MRSAT.METAUI populated by the Metathesaurus AUI of RXAUI |
| 5 | STYPE | Name of the column in RXNCONSO.RRF or RXNREL.RRF that contains the identifier to which the attribute is attached | MRSAT.STYPE |
| 6 | CODE | Source asserted identifier | Not processed |
| 7 | ATUI | Unique identifier for attribute | Not processed |
| 8 | SATUI | Source asserted attribute identifier | Not processed |
| 9 | ATN | Attribute name | MRSAT.ATN |
| 10 | SAB | Abbreviated source name | MRSAT.SAB |
| 11 | ATV | Attribute value | MRSAT.ATV |
| 12 | SUPPRESS | Suppressible flag | MRSAT.SUPPRESS |
| 13 | CVF | Content view flag | Not processed |
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | RXCUI | Unique identifier for concept (concept ID) | MRSTY.CUI populated by the Metathesaurus CUI of RXCUI |
| 2 | TUI | Unique identifier for semantic type | Not applicable |
| 3 | STN | Semantic type tree number | Not applicable |
| 4 | STY | Semantic type | MRSTY.STY |
| 5 | ATUI | Unique identifier for attribute | Not applicable |
| 6 | CVF | Content view flag | Not applicable |
Note: STYs are subject to editing.
This file is created by RxNorm for use in tracking the archival of names (atoms) no longer provided by RxNorm drug source providers, or atoms no longer used by the RxNorm system. Only atoms with SAB = "RXNORM" will be in the archive. This information is not processed for the Metathesaurus as part of RxNorm.
This file provides information about changes to the concept_id (RXCUI) for atoms in RxNorm from release to release. It is not cumulative. This information is not processed for the Metathesaurus as part of RxNorm.
This file of retired CUIs will show each RxNorm Concept Unique Identifier (RXCUI) that existed in a prior release but is not present in the current release. The file includes mappings to current RXCUIs as synonymous or to one or more related current RXCUIs where possible.
| # | Field Name | Description | Representation |
|---|---|---|---|
| 1 | RXCUI1 | Unique identifier of retired concept | MRREL.CUI1 populated by the Metathesaurus CUI of RXCUI1 |
| 2 | VSAB_START | Version Source Abbreviation of the first RxNorm release RXCUI1 appeared in | Not processed |
| 3 | VSAB_END | Version Source Abbreviation of the last RxNorm release RXCUI1 appeared in | Not processed |
| 4 | Cardinality | The number of RXCUIs that RXCUI1 was moved or split to | Not processed |
| 5 | RXCUI2 | Unique identifier of synonymous concept for RXCUI1 | MRREL.CUI2 populated by the Metathesaurus CUI of RXCUI2 |