# LOINC\_NUMS without checksum didgit **URL:** \ **Category:** general-discussion\ **Created:** [June 15, 2021, 1:59pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111 "2021-06-15T13:59:48Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![ecampbell](https://forum.loinc.org/letter_avatar_proxy/v4/letter/e/d07c76/32.png) [@ecampbell](https://forum.loinc.org/u/ecampbell)\ **Post date:** [June 15, 2021, 1:59pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/1 "2021-06-15T13:59:48Z")
Hi, release 2.70 has 12 LOINC\_NUMs without checksum digits (that is, the ids fail the checksum check). Is this intended? LOINC\_NUM Component 44478 Amdinocillin 44507 Amikacin 44535 Amikacin 44204 Acyclovir 44233 Almecillin 44259 Almecillin 44288 Almecillin 44325 Almecillin 44354 Amantadine 44382 Amdinocillin 44411 Amdinocillin 44440 Amdinocillin Thanks, Emily ---
**Author:** ![pdbanning](https://forum.loinc.org/letter_avatar_proxy/v4/letter/p/9f8e36/32.png) [@pdbanning](https://forum.loinc.org/u/pdbanning)\ **Post date:** [June 15, 2021, 3:00pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/2 "2021-06-15T15:00:21Z")
Hi Emily, We just completed the uptake of content at 3M and didn’t encounter this issue. The theory of issuing terms without the Mod10 check digit is still adhered to. I’ve got the LoincTableCore open and filtering on either component or the beginning of a LOINC term. I suspect there is a corruption or format issue with the download at your facility. Will you have someone investigate? The 444\*\* numbers listed for Amdinocillin in your email are for other chemistries. Thank you, Pam ---
**Author:** ![ecampbell](https://forum.loinc.org/letter_avatar_proxy/v4/letter/e/d07c76/32.png) [@ecampbell](https://forum.loinc.org/u/ecampbell)\ **Post date:** [June 15, 2021, 4:08pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/3 "2021-06-15T16:08:27Z")
I will check and get back to you. Thank you. Emily ---
**Author:** ![timbriscoe](https://forum.loinc.org/user_avatar/forum.loinc.org/timbriscoe/32/901_2.png) [@timbriscoe](https://forum.loinc.org/u/timbriscoe)\ **Post date:** [June 15, 2021, 4:21pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/4 "2021-06-15T16:21:07Z")
Emily, These look to be the 12 LOINC codes where Excel interprets the values as dates. If you open Loinc.csv in Excel, it will try to be helpful and convert the codes to a date, e.g. 1-8, 2-6, 3-4. The 12 can be found using this SearchLOINC query (LOINC login required): [https://loinc.org/search/?s=loinc%3A1-%3F+or+loinc%3A2-%3F+or+loinc%3A3-%3F+or+loinc%3A4-%3F+or+loinc%3A5-%3F+or+loinc%3A6-%3F+or+loinc%3A7-%3F+or+loinc%3A8-%3F+or+loinc%3A9-%3F+or+loinc%3A10-%3F+or+loinc%3A11-%3F+or+loinc%3A12-%3F&t=1&o=LOINC\_NUM+asc](https://loinc.org/search/?s=loinc%3A1-%3F+or+loinc%3A2-%3F+or+loinc%3A3-%3F+or+loinc%3A4-%3F+or+loinc%3A5-%3F+or+loinc%3A6-%3F+or+loinc%3A7-%3F+or+loinc%3A8-%3F+or+loinc%3A9-%3F+or+loinc%3A10-%3F+or+loinc%3A11-%3F+or+loinc%3A12-%3F&t=1&o=LOINC_NUM+asc) ---
**Author:** ![ecampbell](https://forum.loinc.org/letter_avatar_proxy/v4/letter/e/d07c76/32.png) [@ecampbell](https://forum.loinc.org/u/ecampbell)\ **Post date:** [June 15, 2021, 4:36pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/5 "2021-06-15T16:36:03Z")
I am looking in LOINC.csv for 2.70 and I see these bad identifiers. Check line 1001 of the file for an example. I will re download the file. Thank you. Emily ---
**Author:** ![ecampbell](https://forum.loinc.org/letter_avatar_proxy/v4/letter/e/d07c76/32.png) [@ecampbell](https://forum.loinc.org/u/ecampbell)\ **Post date:** [June 15, 2021, 5:52pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/6 "2021-06-15T17:52:03Z")
Thank you, Tim, it was the date conversion problem; it is fixed. I really appreciate the rapid reply. Emily ---
**Author:** ![system](https://forum.loinc.org/uploads/default/original/1X/dbab97ce9b2987d788a376e254fcaae249f3b672.png) [@system](https://forum.loinc.org/u/system)\ **Post date:** [June 23, 2023, 3:36pm UTC](https://forum.loinc.org/t/loinc-nums-without-checksum-didgit/1111/7 "2023-06-23T15:36:48Z")