That is my point, not yours. Which is why I don't want this flag, because I need to check whether absence of data means absense of exposure or lack of benefit. The OMOP CDM assumes benefit as a default for an existing OBSERVATION_PERIOD, and you don't want to have to test each time.
Can you open a request in the WG? If it is not in that list, it won't happen. Also: Where are these payer IDs? And do we have them in all the data?
Guys: The CDM is not a sandbox for a bunch of analysts who go on an fishing expedition to bump into interesting facts. It's for standardized tools and methods. Today, all incidence and prevalence calculators (like in ATLAS) assume that patients have benefit so they can be used for the denominator if they have an OBERSERVATION_PERIOD record. All Study Workbenches (like ATLAS) assume that during an OBSERVATION_PERIOD you can look for exposure or outcome. With your flag or @jenniferduryea's extra records, you have to join each time you use that table to see whether the OBSERVATION_PERIOD is the real thing.
Bottom line: Everything we have today will break. You guys need to come up with a better idea of how to handle it so it is backwards compatible.