Yes, you can.
Policy migrations to Cigna's Certified Plans from any other Cigna products, or vice versa, are all regarded as applications for a new policy. That means that underwriting is required, and the coverage and premiums may be affected by any health conditions that may have developed since you started your original cover.
For policy migration among Certified Plans, re-underwriting is waived for benefit downgrade (e.g. from Flexi Plan to Standard Plan or increasing deductible option). In other cases, i.e. where you are applying to increase your coverage, re-underwriting is required.
If you are an existing Cigna policy holder and wish to consider your options with VHIS, please call our hotline on (852) 8100 2261