I checked all the loinc numbers in the map_to file. There 2810 records. If I check the all the values in the first column LOINC against the LOINC table I get a match of 2355. If I match the second column MAP_to against the LOINC table I get 2377 matches. I expect a full match on the second colum. Is there someone who can explain why there is not a full match or what is the use of this file?
The MAP_TO table is used to identify the appropriate replacement for LOINC terms that have been DEPRECATED or DISCOURAGED. You can find a detailed explanation in section 11.2 of the LOINC Users’ Guide.
I have examined the MAP_TO table distributed in the 2.59 release of LOINC. I can find no LOINC number in the MAP_TO.LOINC or MAP_TO.MAP_TO column that does not also appear in the LOINC.LOINC column. Can you please provide examples of the LOINC numbers that you cannot find?