Source:http://linkedlifedata.com/resource/umls/id/C0021288
MSH: An infant having a birth weight of 2500 gm. (5.5 lb.) or less but INFANT, VERY LOW BIRTH WEIGHT is available for infants having a birth weight of 1500 grams (3.3 lb.) or less.,CSP: an infant weighing 5-1/2 pounds or less at birth.