Restrictions in Using Health Care Vouchers
Health care vouchers can be used for:
services provided by medical practitioners, Chinese medicine practitioners, dentists, chiropractors, registered nurses and enrolled nurses, physiotherapists, occupational therapists, radiographers, medical laboratory technologists (the use of services provided by allied health professionals and laboratory test services is subject to the current referral arrangement) and optometrists (in Part I of the register); and
preventive care, curative and rehabilitative services.

Health care vouchers cannot be used:
for solely purchasing products such as medication, spectacles, dried seafood or medical equipment;
for public healthcare services subsidised by the Government, including healthcare services which the Hospital Authority purchases from the private sector (e.g. the General Outpatient Clinic Public-Private Partnership Programme), unless otherwise specified;
for inpatient services, pre-paid healthcare services and day surgery procedures, such as cataract surgery or endoscopy services; and
to settle the fees of healthcare services provided by service providers who have not enrolled in the Scheme.

The unspent voucher amount can be carried forward and accumulated by an eligible elder. There is no restriction on the number of years that an elder may carry forward the unspent voucher amount but it cannot exceed the accumulation limit*.
(* With effect from 26 June 2019, the accumulation limit has been increased to $8,000.)

Starting from 26 June 2019, the Quota of vouchers that can be spent by each eligible elder on optometry services is capped at $2,000 every two years.  For elders who are eligible to use vouchers in 2019 (i.e. those born in 1954 or before), the 1st cycle has started from 26 June 2019 until 31 December 2020.  The 1st cycle of less than 2 years is also make available a Quota of $2,000 vouchers for use on optometry services.  The 2nd 2-year period will start from 1 January 2021 until 31 December 2022, and so on.  For those born in 1955 or after, the 2-year period will count from 1 January of the year in which they become eligible to use vouchers. 

Save for the above, there is no limit on the voucher amount that can be used each time of receiving healthcare service but the total voucher amount used by a voucher recipient to settle the fee for healthcare service received should not exceed the amount of fee for that service.

No advance of voucher amount which is yet to be issued is allowed, and it cannot be redeemed for cash, transferred to or shared with another person.