Doctor Lee obtained his medical degree in 2002 from University Putra Malaysia. He then worked at the Penang General Hospital and was rotated to the Balik Pulau and Serdang Hospitals in various departments between 2002 to 2008.
Klinik Holistic Healthcare was founded in 2008 by Dr Lee Cheng Lok & company. In 2014, he teamed up with Cassandra Chong to launch Heal Within that became the parent company of Klinik Holistic Healthcare. Doctor Lee Cheng Lok is the medical director and mastermind to all treatment and wellness program protocols and the formulation of all products & services at Heal Within.