Inventory that reconciles against what was administered.
A vial is a cost and a unit is a price. The gap between what was opened and what was charged is one of the largest uncontrolled leaks in this vertical, and most practices discover it annually, as a surprise.

A legal requirement almost nobody covers natively.
Most platforms in this vertical rent it from a third party, which puts the compliance record outside the patient's chart. Here it is a state on the patient with an author, a date and an expiry, gating the treatments that require it.
- Unit
- The billable increment for a neuromodulator. Recorded by injection site, deducted from inventory.
- Syringe
- The billable increment for filler, with product and lot carried to the record.
- Good-faith exam
- The pre-treatment examination state, with author, date and expiry.
- Rollover credit
- Unused membership value carried forward, with its own expiry, visible to both sides.
- Standing orders
- Protocols under which an injector treats, recorded against the medical director.
- Recall interval
- Treatment-specific follow-up scheduled from the treatment date, not the booking date.
Recurring revenue with the awkward parts modelled.
Rollover credits that expire, pauses, mid-cycle upgrades, treatment banked against a plan, and the churn arithmetic that says whether the program is actually growing.