Your patients arrive with their record.
You change nothing.

One call. A deterministic ladder.

For each patient you send, PHB walks a fixed, deterministic ladder — an exact match or a fresh number, never a fuzzy guess:

1. crosswalkAlready linkedWe've seen this patient from you before — the same HPN comes back. Re-sending is a safe no-op.
2. HPNYou already hold the HPNIf your record already carries a valid PHB HPN, we honour it and link your local id to it.
3. NINMatched by NINThe same person at two hospitals resolves to one HPN. This is what makes PHB a network, not another silo.
4. phoneMatched by phoneA single phone on a single record links cleanly. More than one — we never guess; it routes to a human to confirm.
5. mintNo match → a new HPNA new provisional HPN is issued. Name + date of birth + sex is enough — NIN can follow later.

NIN is optional — a dedup hint, never required and never trusted as proof until the patient verifies it themselves. The exchange returns an HPN and a status; it never returns a patient’s clinical record.

You keep everything. You add a front door.

• —Keep your existing EMR. Nothing to migrate, nothing to replace.
• —Your patients gain a front door — the whole PHB app/web/USSD — even if your system has none.
• —One identity that follows the patient across every facility they visit.
• —Identity only: we return an HPN, never a patient’s clinical record. No PHI leaves your walls.

One number that finally belongs to them.

• —One lifetime Health Point Number — the same at every hospital, lab and pharmacy.
• —Their records can follow them instead of starting from zero each visit.
• —The full PHB patient experience: records, consent, family, payments, transparency.
• —They confirm their own NIN and phone later — their identity, their control.