documentation:vocabulary:cpt4
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| - | ===== CPT-4 ===== | + | ===== CPT4 ===== |
| - | CPT4 is a coding system for the reimbursement of ambulatory services in the US healthcare system. | + | CPT4 is a coding system for the reimbursement of ambulatory services in the US healthcare system. **Note**: CPT4 is called Common Procedural Terminology, but it does not just contain medical procedures. |
| ==== Sources ==== | ==== Sources ==== | ||
| - | All CPT4 codes are sourced from the NLM, as are the relationships from MeSH and LOINC. Relationships to SNOMED and RxNorm (see below for Procedure Drugs) are provided by OHDSI. | + | All CPT4 codes are sourced from the NLM, as are maps from MeSH and relationships to LOINC. Relationships to SNOMED and RxNorm (see below for Procedure Drugs) are provided by OHDSI. |
| ==== Standard Concepts ==== | ==== Standard Concepts ==== | ||
| All valid CPT4 Concepts are Standard Concepts, with the exception of CPT4 section or subsection heading codes (CPT4 Hierarchy Concepts), which are Classification Concepts. | All valid CPT4 Concepts are Standard Concepts, with the exception of CPT4 section or subsection heading codes (CPT4 Hierarchy Concepts), which are Classification Concepts. | ||
| + | |||
| ==== Concept Classes ==== | ==== Concept Classes ==== | ||
| Concepts are assigned Concept Class as following: | Concepts are assigned Concept Class as following: | ||
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| Domains are manually assigned to CPT4 Hierarchy Concepts and propagated down to the CPT4 Concepts. | Domains are manually assigned to CPT4 Hierarchy Concepts and propagated down to the CPT4 Concepts. | ||
| - | ==== Relationships ==== | + | ==== Relationships, Hierarchy ==== |
| Relationships are defined within CPT4 and to the following other vocabularies: | Relationships are defined within CPT4 and to the following other vocabularies: | ||
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| These relationships are defined as "CPT4 - SNOMED cat" and "CPT4 - SNOMED eq" for categorical ("uphill") and equivalent relationships. These relationships embed the CPT4 system in a larger hierarchy for procedures, measurements, observations and devices. | These relationships are defined as "CPT4 - SNOMED cat" and "CPT4 - SNOMED eq" for categorical ("uphill") and equivalent relationships. These relationships embed the CPT4 system in a larger hierarchy for procedures, measurements, observations and devices. | ||
| - | ==== Procedure Drugs in CPT4 ==== | + | === Hierarchy === |
| + | CPT4 contributes to the hierarchies of the Procedure, Measurement and Observation Domains. SNOMED provides the higher hierarchical concepts, while CPT4 are connected as descendents all the way down to leaf nodes. | ||
| + | === Maps === | ||
| + | All valid CPT4 codes are Standard Concepts and therefore map to themselves. In addition, there are mappings to RxNorm Drug concepts for Procedure Drugs. | ||
| + | |||
| + | === CPT4 to RxNorm map === | ||
| In CPT4, only vaccinations are recorded in sufficient detail that the administered drug can be inferred. Other Procedure Drugs, such as chemotherapies, are only mentioned as general Procedures, without mentioning any specific Drug Product. The Vaccine Concepts are between concept_code 90281 and 90749. They are also descendants of the CPT4 hierarchical term 1012602 "Vaccines, Toxoids". | In CPT4, only vaccinations are recorded in sufficient detail that the administered drug can be inferred. Other Procedure Drugs, such as chemotherapies, are only mentioned as general Procedures, without mentioning any specific Drug Product. The Vaccine Concepts are between concept_code 90281 and 90749. They are also descendants of the CPT4 hierarchical term 1012602 "Vaccines, Toxoids". | ||
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| * List of Ingredients. Note that the OMOP Standard Vocabularies currently do not support the notion of Ingredient combinations. Therefore, a single CPT4 Concept will be mapped to all individual Ingredients. The consequence of that is that for each CPT4 record there are as many DRUG_EXPOSURE records as there are Ingredients. | * List of Ingredients. Note that the OMOP Standard Vocabularies currently do not support the notion of Ingredient combinations. Therefore, a single CPT4 Concept will be mapped to all individual Ingredients. The consequence of that is that for each CPT4 record there are as many DRUG_EXPOSURE records as there are Ingredients. | ||
| - | + | ** Ambiguous CPT4 Procedure Drug Concepts ** | |
| - | ==== Ambiguous CPT4 Procedure Drug Concepts ==== | + | |
| The following CPT4 Concepts cannot be unambiguously assigned to RxNorm. The reason is that there is more than one type of Vaccine availabe to immunize against a certain infectious disease, but CPT4 does not distinguish between them. For exampe, for Botulinum Antitoxin, there are human and equine antibodies or sera against the Botulinum Toxin variants A to F, and different combinations of antitoxins are on the market against these variants. | The following CPT4 Concepts cannot be unambiguously assigned to RxNorm. The reason is that there is more than one type of Vaccine availabe to immunize against a certain infectious disease, but CPT4 does not distinguish between them. For exampe, for Botulinum Antitoxin, there are human and equine antibodies or sera against the Botulinum Toxin variants A to F, and different combinations of antitoxins are on the market against these variants. | ||
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| |2213450|90676|Rabies vaccine, for intradermal use| | |2213450|90676|Rabies vaccine, for intradermal use| | ||
| - | ==== Influenza Vaccines ==== | + | ** Influenza Vaccines ** |
| Influenza A virusses are very volatile and each year a new product is developed by the pharmaceutical industry for use during the flu season. That means that the same CPT4 Concept will be mapped to different Drugs dependent on the year. The following table contains all Influenza virus vaccines. At a later point, a mechanism for the correct mapping will be provided here that takes the administration date into account. | Influenza A virusses are very volatile and each year a new product is developed by the pharmaceutical industry for use during the flu season. That means that the same CPT4 Concept will be mapped to different Drugs dependent on the year. The following table contains all Influenza virus vaccines. At a later point, a mechanism for the correct mapping will be provided here that takes the administration date into account. | ||
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| |44816518|90688|Influenza virus vaccine, quadrivalent, split virus, when administered to individuals 3 years of age and older, for intramuscular use| | |44816518|90688|Influenza virus vaccine, quadrivalent, split virus, when administered to individuals 3 years of age and older, for intramuscular use| | ||
| - | ==== CPT4 vaccines that do not correspond to a marketed Drug Product ==== | + | ** CPT4 vaccines that do not correspond to a marketed Drug Product ** |
| Certain CPT4 Concepts describe vaccination using a Drug that is not or no longer approved by the FDA and marketed by a manufacturer for general use. Some of them are strictly for military use, some of them have been out of circulation before RxNorm started: | Certain CPT4 Concepts describe vaccination using a Drug that is not or no longer approved by the FDA and marketed by a manufacturer for general use. Some of them are strictly for military use, some of them have been out of circulation before RxNorm started: | ||
documentation/vocabulary/cpt4.1441664747.txt.gz · Last modified: 2015/09/07 22:25 by cgreich
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