Three revenue streams, usually measured as one
Referrer work, insurer work and the patient who buys directly
A UK private laboratory typically earns from episodes referred by clinicians, episodes funded through private medical insurance, and a growing number of patients who decide for themselves that they want a panel and pay for it. These behave nothing alike. They have different lead times, different points of failure and different people making the decision. Reported as one monthly total, they hide each other.
Funding route as a field, not a footnote
Recording how each episode is funded is a small change with a disproportionate effect. It separates conversion rates that were previously averaged together, shows which stream is actually growing, and makes it obvious when the self-pay side has quietly become significant enough to deserve its own process rather than being absorbed by reception.

