Start here: confirm what your own health system provides
Keloid surgery and its adjuvant treatment are usually available through your own health system where the keloid causes genuine symptoms, such as pain, itching, restricted movement or recurrent infection, since this is then treatment of a medical condition rather than purely cosmetic surgery. Purely cosmetic removal of an asymptomatic keloid is less consistently funded and varies by health system.
Confirming your specific entitlement, including whether the follow-up adjuvant treatment is covered as part of the same pathway, matters more for this procedure than almost any other on this site, since that follow-up, not the excision, is what actually determines the outcome.
Where a keloid is on a visible area and causes no physical symptoms at all, some health systems classify its removal as cosmetic regardless of how much distress it causes, which can place the entire cost, including the adjuvant phase, outside funded care. This is worth clarifying directly and early, since the answer materially changes the financial picture for the whole plan.