E66 for Hams. Dear Fatpeoplehate, E66 should be the new code for hams.   No, seriously, in the medical field under the new ICD-10 codes, E66 is the diagnosis for "obesity".  There are other identifiers after E66 which make the diagnosis more specific, like E66.01 for morbid obesity due to excess calories or E66.2 for morbid obesity with alveolar hypoventilation.  Just thought I'd share that with you folks.