Koh has also served as a Clinical Lecturer at the National University of Singapore (NUS), and as an Adjunct Assistant Professor at the Duke-NUS Graduate Medical School.
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The by-election was triggered by the resignation of the previous Member of Parliament for the ward, the PAP's Michael Palmer (who served as the Speaker of Parliament from 2011 to 2012), who stepped down after he revealed that he had an extra-marital affair.
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He also received Health Manpower Development Programme Scholarships from Singapore's Ministry of Health for advanced training in the surgical treatment of inflammatory bowel diseases in Edinburgh and at the Cleveland Clinic in Ohio.
Her PAP opponent was colorectal surgeon Koh Poh Koon (who had never contested a parliamentary election before).
On 10 January 2013, PAP unveiled their candidate for the by-election: Dr Koh Poh Koon, a 40-year-old colorectal surgeon from Mount Elizabeth Medical Centre.
Terence Koh | Koh-i-Noor | Tommy Koh | Koh Kong Province | David Koon | Koh Tang | Tan Koon Swan | Koh Poh Koon | Koh Lay Huan | Koh Kong | Koh Buck Song | KOH | Poh Ah Tiam | Kwong Wah Yit Poh | Koh Tsu Koon | KOH test | Koh Kong (city) | Koh Ker | Koh-i-Baba | Joo Koon MRT Station | Jennifer Koh | Janice Koh | Jalan Datuk Wira Poh Ah Tiam | Goh Poh Seng | Gerald Koh | Ella Koon | Ching Chung Koon | Chia Thye Poh |