Unsure if this is what you're asking for but here I go with an overly simplistic attempt. Start by breaking down a specific healthcare need such as "treating a broken finger". Record the number of hours it takes to diagnose, treat, followup, etc. Calculate the dollar cost (or appropriate currency) as best as you can; cost of expendables used, wages of medical workers, and other more concrete dollar valued things. If possible or necessary add some fraction of the less concrete dollar valued things by working out some calculations for the cost of running a medical facility, training/education of medical professionals, retirement, retention efforts and other administrative things.

Do some more math and that should get an approximation, in currency, of the value of a healthcare service.

If you're asking about how things like healthcare relate to things like a factory worker making widgets, maybe think of it like a technician who is called in to repair or maintain a machine in the factory (a bit dehumanizing of an example but their purpose is the same in a way). When the machinery is fixed/maintained, the factory can maintain productivity or increase productivity. When the workers are kept in good health and their injuries are properly treated, the factory can maintain productivity.