** Index of Australian Healthcare stocks .AXHJ rises 1.9%, tracking broadly positive market sentiment .AX

** Bell Potter says that most healthcare firms remain unaffected from tariff impacts, but Nanosonics NAN.AX, Aroa ARX.AX, and Trajan TRJ.AX, which generate significant U.S. sales from international medical devices/equipment, may be susceptible

** Neuren NEU.AX, Clarity CU6.AX and Polynovo PNV.AX are among the top gainers on the sub-index, up 20%, 6.7% and 6.3% respectively

** Brokerage expects some impact on country's biggest pharma co CSL CSL.AX given fractionation of its unit's plasma-derived products across Australia, Germany, Switzerland and the U.S.

** Adds, tariffs could impact pharma cos, but lack of details complicates potential impact assessment

** Sub-index down 12.2% YTD, compared to 5% drop in benchmark ASX 200 .AXJO

(Reporting by Kumar Tanishk in Bengaluru)

((Tanishk.Kumar@thomsonreuters.com; X: @thatstanishk http://www.x.com/thatstanishk;))