NEW DELHI: National Pharmaceutical Pricing Authority has issued notice of Rs 1,26,547, to Faridabad's Metro Heart Institute for allegedly violating the ceiling prices of stents fixed by the government and billing patients more. Sources said more such demand notices to hospitals overcharging patients on stents are likely to come up. The levied fine includes recovery of overcharged amount from patients in two different cases along with 15 per cent interest. The regulator said the fine is provisional and can also be revised.