Dr Christian Jessen from TV's Embarrassing Bodies came to the Crown Clinic for a hair transplant because he wanted a fuller hair line.
He had always had high temples and hated the 'academic' look which this had created with his floppy hair.
Dr Shahmalak has worked closely with Dr Jessen on his hugely popular Channel 4 medical show over the last few years.
Dr Jessen knew that he would get the best possible treatment here, and travelled from his home in London for the transplant.
For Dr Shahmalak, working with such a respected medical professional was an honour. Truly, he was the doctor's doctor!
Dr Jessen said: 'I’m delighted that I’ve had it done. I don’t worry about getting older and the effect on my looks, but I’ve always hated my hairline.
"I’ve had very high temples since I was a teenager, which gave me quite an ‘academic’ look. My hairline wasn’t receding, I just wanted to change the shape of it."
The presenter opted for a follicular unit graft - more popularly known as 'the strip.'
The operation involved taking a strip of hair from the back of the scalp, then dividing it into individual hairs and planting them like seedlings into the hairline.
Dr Jessen said he decided to have the operation after meeting a man who’d had a hair transplant on Embarrassing Bodies.
He explained: 'I thought to myself: "Why am I always telling people how to change things about their bodies that they dislike if I can’t do the same thing for myself?"
"It’s nothing to be ashamed about. These days lots of men are doing things to improve their appearance.
"I’ve done this for myself and I’m really pleased with the results."
Dr Shahmalak said that he was thrilled to have worked with Christian.
"It was a real privilege to be asked," said Dr Shahmalak. "Christian is the best known doctor on TV and hugely respected by everyone for his great work on shows like Embarrassing Bodies.
"It was great to be chosen as the doctor's doctor.
"I am glad I was able to give his hair a little more bulk at the front and help him to lose that 'academic' look that he hated.
"I carried out the transplant on Christian three years ago and I am delighted at how well his TV career has gone since then. I have also really enjoyed working with him on Embarrassing Bodies and helping patients on the show who have had problems with their hair."
Dr Shahmalak said that it was very brave of Dr Jessen to go public about his treatment.
"There is a huge pressure on everyone in the media to look good," he said. "It is fantastic that people like Christian are brave enough to come forward and reveal how they have benefited from my help.
"And obviously it is wonderful for me to see celebrities who I have helped doing so well on TV."