The orchestra was founded in 2010 and plays one concert a year to raise money for medical charities including Freedom from Torture, which provides medical care to torture survivors.
Royal London consultant surgeon Stephen Brearley will conduct performances of Schubert's Symphony No. 9 and Berlioz’s Symphonie fantastique on 10 March.
The two symphonies, both written when the composers were in their twenties, were chosen for their contrasting style and technique.
Mr Brearley, who founded the orchestra, said: ‘The players are excellent. Many doctors are also musicians and, as there are many doctors, it follows that we have a large pool of talent available. Some of the doctors in the orchestra have actually been professional musicians before or alongside their medical careers.
‘Freedom from Torture helps torture survivors in many ways including the use of writers groups, art studios and music workshops, many of which have been outstanding successes.
‘The power of music to bring healing and joy is legendary. We hope our concert will bring joy to Freedom from Torture’s supporters and clients alike, as well as raising a substantial sum of money to support the organisation's invaluable work.’
As well as GPs, the orchestra includes physicians, surgeons, anaesthetists, paediatricians and gynaecologists.
GP is giving away a pair of top price tickets to the concert, which takes place on Tuesday 10 March 2015 at 7.30pm. The competition is open to practising GPs only. To win, email your details to: firstname.lastname@example.org.
You can buy tickets from the Cadogan Hall website.