Patients, consultations, pharmacy and billing.
A patient should be registered once and found instantly on every visit after that. This runs the journey from the front desk to the pharmacy and the cashier.
Patient records with history, next of kin and insurance, so a returning patient is found rather than re-created.
Clinicians record presenting complaint, examination, diagnosis and plan against the visit, and can see what happened last time.
Requests go to the lab and prescriptions to the pharmacy without a paper chit, and dispensing draws down real stock.
Cash, insurance and scheme patients are billed from the same visit record, so the cashier is never guessing what was done.