She and several other patients had made numerous complaints about drivers not treating them well.
"This is the only way I think they'll start listening to us. I know the risks and I'm prepared to hold off as long as I can."
Auckland kidney specialist Dr David Voss said: "You won't get into serious trouble missing dialysis for a few days. But you will die without it. She needs dialysis to stay alive. It's as simple as that."
Auckland Co-op Taxis took a contract to transport patients for the Auckland, Counties Manukau and Waitemata district health boards in mid-July. Before that, patients were transported by North Harbour Taxis.
Mrs Marsters Kupa said Co-op drivers were open about their policy, which was to "pick up and drop off and nothing else". The flat rate for a driver for a contracted job was around $1.80 a km - effectively half the usual fare.
Auckland Co-op Taxis general manager Barry White said the company had been advised not to comment to media and to direct all inquiries to the DHBs.
Health Alliance, which contracts the taxi service on behalf of the Auckland DHBs, said it had been made aware of the complaints.
Chief executive Mike Schubert said: "We are actively addressing matters that have arisen and will continue to deal with any patient concerns."