Dr Rehab Al Jumaily, 51, was worried that her 13-year-old would be picked on if he ended up as diminutive as the rest of his family even though he was normal height for his age.
Al Jumaily could be struck off the medical register, suspended or cautioned by the General Medical Council.
She falsified the prescriptions for the growth hormone, despite her 5ft 2in youngster, who cannot be named for legal reasons, having been the subject of only one reported bullying incident at school.
The teenager was six inches over the normal threshold for hormone treatment and half an inch above the average height for his age.
Al Jumaily, a partner in a West Hull surgery, East Yorkshire, used three false names to write out £6,000 worth of prescriptions for the drug Genetropin, which she then injected into her son.
She admitted three charges of deception at Hull Crown Court last year and was fined £22,500.
Al Jumaily was also ordered to pay costs of £1,200 and make a £3,037 confiscation order - or serve three months jail in default.
She appeared before the General Medical Council in London today who will decide if her fitness to practice is impaired.
The court hearing was told Al Jumaily, who is 5ft, and her husband were both short and their 16-year-old daughter had stopped growing at the age of 11 when she reached 4ft 10in.
Al Jumaily, then a GP at the Marmaduke Health Centre in Hull, said she had noticed her son's growth slowing down. She was able to obtain Genetropin worth £3,036 supposedly for a 10-year-old girl apparently called Katy Moore at the Alliance Pharmacy, North Point Shopping Centre, Bransholme.
Today Stephen Brassington, a lawyer acting for the GMC, said the pharmacy was "understandably suspicious about its provenance" because the script had come from a GP and not an expert in growth disorders.
The lawyer said Boots in Hull handed out four vials of 12mg Genetropin for another fictitious youngster called Jennifer Smith on August 17 of that year.
Between August 31 and September 6 Al Jamaily received eight further vials for an imaginary 11-year-old called Charles Smith.
All the treatments, which are relatively expensive for adults, were free as they were supposedly for patients aged under 16.
Mr Brassington said: "The prescriptions were fraudulent. No such patients existed."
Fraud investigators quickly discovered that the names of the patients on the prescription forms were fabricated.
Mr Brassington said: "The doctor admitted that she had written all these prescriptions using fictitious names, that she had collected the drugs herself on the first two occasions and had attempted to on the third occasion."
He added: "She admitted what she had done was wrong and dishonest."
The GP, of Dunswell, near Hull, told officers her son "was small for his age and had been bullied at school" after she was arrested.
During her court hearing, the judge had been told that was no evidence to suggest her son had any growth hormone deficiency or that he had been seriously bullied.
Al-Jumaily, of Dunswell, near Hull, made no notes to monitor her son's reactions. It is not known whether the Genetropin had any significant effect on his health. Excessive levels of human growth hormones can lead to abnormal growth of the hands, feet and face, high blood pressure and excessive hair growth.
The hearing continues.
ncG1vNJzZmivp6x7tbHLnp6rmaCde6S7ja6iaKaVrMBwfpBycG1waGSTornIpbBmnJ%2BYwbC%2BjJ%2BYpJ2UYr2zsdKcqaKopJ68r7%2BMn6arZZenvLjAx2afqKqdpLumv4yfpqtlmJq%2Fbr%2FOp2SpmZ6auW60xJqprGaYqbqt