Come Oct. 1, you won't have time to fumble with new codes in the emergency department -- so get familiar with these 10 ED-relevant codes before then: 070.70 -- Unspecified viral hepatitis C, without hepatic coma 070.71 -- Unspecified viral hepatitis C, with hepatic coma 252.00 -- Hyperparathyroidism, unspecified 252.01 -- Primary hyperparathyroidism 491.22 -- Obstructive chronic bronchitis with acute bronchitis 524.64 -- Temporomandibular joint sounds on opening and/or closing the jaw 528.79 -- Other disturbances of oral epithelium, including tongue 788.38 -- Overflow incontinence V46.11 -- Dependence on respirator, status V46.12 -- Encounter for respirator dependence during power failure -- Note: This is not a comprehensive list of all the new ICD-9 codes for 2005, just the ones you'll use most in the emergency department.