Our current understanding of galaxy evolution still has many uncertainties associated with the details of accretion , processing , and removal of gas across cosmic time . The next generation of radio telescopes will image the neutral hydrogen ( H I ) in galaxies over large volumes at high redshifts , which will provide key insights into these processes . We are conducting the COSMOS H I Large Extragalactic Survey ( CHILES ) with the Karl G. Jansky Very Large Array , which is the first survey to simultaneously observe H I from z = 0 to z \sim 0.5 . Here , we report the highest redshift H I 21-cm detection in emission to date of the luminous infrared galaxy ( LIRG ) COSMOS J100054.83+023126.2 at z=0.376 with the first 178 hours of CHILES data . The total H I mass is ( 2.9 \pm 1.0 ) \times 10 ^ { 10 } \leavevmode \nobreak M _ { \odot } , and the spatial distribution is asymmetric and extends beyond the galaxy . While optically the galaxy looks undisturbed , the H I distribution suggests an interaction with candidate a candidate companion . In addition , we present follow-up Large Millimeter Telescope CO observations that show it is rich in molecular hydrogen , with a range of possible masses of ( 1.8 - 9.9 ) \times 10 ^ { 10 } \leavevmode \nobreak M _ { \odot } . This is the first study of the H I and CO in emission for a single galaxy beyond z \sim 0.2 .