To identify case of emergency or non-emergency, there is an App that can help, which is the MOH iHealth Sg (downloaded in App Store & Google Play). To locate nearest neighbourhood clinics, refer to this site (HCIDirectory.sg).
For emergency cases, go to Hospital Accident and Emergency (A&E), which can also be searched using HCIDirectory and determine the nearest by radius (relative to the postcode input) in kilometer.
The following map is just for Western region (shown are the selected extended [in red coloured dots] and 24 hours [in yellow] clinics)
List of clinics
28 - Prohealth Medical Group at Blk 399 Yung Sheng Rd, #01-56 S610399 Tel 62682628 Open Mon-Fri until 10 pm, Sat-Sun-PH until 10 pm
43 - Acumed Medical Group at 71 Pioneer Rd, #01-06 S639591 Tel 68615996 Open Mon, Tue until 9pm Wed-Fri until 5 pm, Sat-Sun until 1 pm
48 - Acumed Medical Group at 1 Jurong West Central 2, Jurong Point Shopping Centre, #B1A-19E S648886 Tel 67923822 Open Mon-Fri until 10 pm, Sat-Sun-PH until 9 pm
123 - Shenton Family Medical Clinic at Blk 372 Bukit Batok St 31, #01-378 S650372 Tel 65665671 Open Mon-Fri until 11 pm, Sat-Sun-PH until 11 pm
131 - Northeast (Bukit Batok) 24 hrs family clinic at Blk 633 Bukit Batok Central, #01-128 S650633 Tel 68755911
134 - Cashew Medical & Surgery at 445 Fajar Rd, Fajar Shopping Centre, #02-522 S670445 Tel 67634255 Open Mon-Fri until 9.30 pm, Sat-Sun until 9.30 pm
149 - Prohealth 24 hrs Medical Clinic at Blk 259 Bukit Panjang Ring Rd, #01-18 S671259 Tel 67652115
172 - Raffles Medical at 21 Choa Chu Kang Ave 4, Lot 1 Shoppers' Mall, #B1-7A S689812 Tel 67653363 Open Mon-Fri until 9.30 pm, Sat-Sun-PH until 9.30 pm
173 - River of Life Family Clinic at Blk 26 Teck Whye Lane, #01-190 S680026 Tel 67600501 Open Mon-Fri until 9.30 pm, Sat-Sun until 9.30 pm
In order not to be disappointed in the time of need of clinics, it is best to call them first to ensure that the clinic is operational. If it is an A&E, go to the nearest hospital. The contact shown above was procured from the HPB booklet. For more updated contacts, it is best to refer to the HPB website or HCIDirectory.