Teleconference 2020-05-27

May 2020 - HL7 WGM - Wednesday 3pm Minutes

The initial implement of canonical URIs (resolution 2 from the meeting with Vocab) is being demonstrated using NANDA at https://build.fhir.org/ig/HL7/UTG/branches/UP-64-correct-url-and-metadata-information-for-nanda/CodeSystem-nanda.html 

Review resolutions....do we need to "publish" these as HTA?

Roel: would like the "HL7 Guidelines" for what really is a "canonical URL".  Vocab does have draft guidance on that Proposed Vocabulary WG Policy on Creation of Canonical URLs for Code Systems in THO

UTG = HL7 in this context, but policy is primarily focused on HL7-created URLs.

Put a link in to Vocab from our policy pages rather than republish.

HTA also needs to find a time to meet more with Vocab....currently Vocab is 3.30-5pm (EST) alt Thursdays; would prefer to hold a joint during HTA time....so maybe every 3rd HTA call, HTA will invite Vocab as long as there are agenda items.  Reuben/Carol to confirm with Vocab.  Likely first in schedule will be the end of June meeting.

"Need a value set for NDC-11" - need "an artefact" that can be used to reference the NDC-11 in FHIR implementations.  There has had a long standing Zulip thread; FDA creates the NDC code system but it is implemented by the pharma manufacturers and re-labellers 

https://phpa.health.maryland.gov/OIDEOR/IMMUN/Shared%20Documents/Handout%203%20-%20NDC%20conversion%20to%2011%20digits.pdf

There are 3 different formats in 3 segments with dashes - NDC-9, NDC-10, NDC-11 etc.  MPD suppliers (FDB, Multum) make their own normalised format (11 format).  RxNorm also publishes the 11 digit format - but it may not be a full list.

In UTG: https://build.fhir.org/ig/HL7/UTG/CodeSystem-v3-ndc.html - this is the FDA registered NDC code system - which does not represent the NDC-11 codes as used by the MPD providers.

There is an OID for NDC treating it as a code system, but in many ways acts more like a GTIN

There can be multiple identifiers for a single concept.  NDC-9, NDC-11 could/can be treated as separate code systems.  

Policy question:
The HTA does not believe that NDC-11 is a separate code system from the FDA's registered NDC code system

Frank: in use they are referred to differently (but is this any different from 2 letter and 3 letter country codes?)

Therefore - the implementation question for the value set moves to Vocab.

Update on work done

PHIN VADS - ?

ISO 3166 (Roel)

Utilization of ISO codes for Preferred Language: BCP 47 in USCDI FHIR IG eMail thread is here

 The current ask within BCP47 is

• Davera Gabriel will look up more information about BCP-47 (a document authored by the IETF trust) for language codes in the US Core FHIR IG.  Davera will check if this is actually a "nested reference" and is actually a syntax using ISO

Carol and Suzy Roy 

and Sara Armson

Suzy had to leave before we got to this item

Response from the FHIR Accelerator was somewhat negative - FHIR Accelerators have too much to worry about already.  Responded that we are hearing from Accelerators and also that our process will encourage direct contact; re-iterated the "one contact per Accelerator" as per SNOMED too.  Awaiting further response

Nothing yet from PIC re: the Co-Chair handbook.

Not discussed

Not discussed