During their relationship, he also prescribed an anti-depressant drug to Ms Y without "adequate clinical justification".
Later, she asked him for compensation for "injury to her feelings and loss she had suffered".
Instead of following protocols, Dr Maharajh began paying Ms Y. The payments continued even after she laid a complaint with the Health and Disability Commissioner.
The tribunal also found Dr Maharajh had encouraged Ms Y to mislead the Health and Disability Commissioner about the nature of their relationship.
The tribunal cancelled Dr Maharajh's registration and ordered him to pay $27,000 to the Medical Council and $46,000 to the Health and Disability Commissioner.
Dr Maharajh formerly lived in Tauranga but now works in Australia. Brendan Manning