It’s a number used by a business that does SMS contact for medical practitioners. Hence, when a patient gives a wrong number, or a medical centre enters it incorrectly, a “weird” medical message goes to a random person.

Scam

Caller: Sms

I don’t know or live or need any of their appt.
This is a reminder that your appointment for Blood Pressure Monitor & Holter Monitor is scheduled on the 19/09/2023 at 10:30 AM at Northwest Cardiology 56 Childs Road, EPPING 3076

Just got a text message from this number that only says "YES" and that's it.

No. Number on my messages. decided to check before ringing.

text message Asking to register my personal details for "the infusion clinic" but the number is different for the real clinic. I have no connection to any clinic.

Caller: Mary from Dr Dixon Woon's rooms

Request for payment and signed financial consent. Also details regarding medical procedure.

Definately a scam.
Not connected to any DR etc.

Caller: Two different doctors

Two different doctors appointment confirmations.

A Dermatologist in Orange NSW