Reolubin is one of the country’s 186,000 medical coders who work in the back offices of hospitals. It’s her job to translate doctors’ scribbles into diagnosis codes. Those are sent to insurance companies, which use them to determine how much to pay hospitals for care. With 14,000 codes, ICD-9 seems puny by comparison. The new manual explodes that code set to 68,000 much more granular and detailed terms to define — very exactly and specifically — what ails us. There are different numbers for getting struck or bitten by a turkey (W61.42 or W61.43). There are codes for injuries caused...