The Hospital Authority(HA) will gradually adopt a set of designated prefixes for caller identification (caller ID) numbers. Starting from June 2026, below caller ID will be displayed when phone calls are made by NTWC hospitals or clinics.

NTWC Hospitals
Incoming call Display Number
Tuen Mun Hospital
1828 559
Pok Oi Hospital
1828 562
Tin Shui Wai Hospital
1828 564
Castle Peak Hospital & Siu Lam Hospital
1828 566
Pok Oi Hospital Tin Ka Ping Infirmary
1828 563
NTWC Clinics
Incoming call Display Number
Tuen Mun Family Medicine Clinic
1828 663
Tuen Mun Wu Hong Family Medicine Clinic
1828 666
Tuen Mun Yan Oi Family Medicine Clinic
1828 662
Tuen Mun Eye Clinic
1828 669
Yuen Long Jockey Club Family Medicine Clinic
1828 667
Kam Tin Family Medicine Clinic
1828 661
Yuen Long Madam Yung Fung Shee Family Medicine Clinic
1828 664
Tin Shui Wai (Tin Shui Road) Family Medicine Clinic
1828 665
Tin Shui Wai (Tin Yip Road) Family Medicine Integrated Centre
1828 668

The HA also reminds members of the public that all numbers starting with 18285 or 18286 will be used solely for caller ID purposes of calls made by the HA, to assist the public in identifying incoming calls. When members of the public call back the number, they will generally only hear a recorded phone message indicating which public hospital or clinic the call originated from. If necessary, staff will contact them again proactively later. The caller ID number will not be connected to the relevant public hospital or clinic. After the caller ID number transition, the phone numbers of the HA operating units remain unchanged. Members of the public may visit the HA website to check the relevant dialing numbers.