Hypochondriacs will find a coding book useless as it does not list symptoms. ICD 9 and the transition into ICD 10 are sources for billing and paying medical claims. Should a person view their explanation of benefits from their health insurance provider or from their health care provider, they may be able to look up a code to verify that yes they do infant agree with the diagnosis given but in all actuality, the physician should have already stated what the diagnosis is while the person was in the clinic.
While paying claims with a health insurance company, I will often see a diagnosis for "feigning illness" or a diagnosis which describes the persona as a drug seeker which means that the patient may have to pay for the services on their own.
In this case, I would love to see a person dispute their prescription drug habit in a court of law. Other than that, a coding manual is really of no use to anyone outside of the medical community. It serves no purpose. Maybe you are both thinking of the many revisions of the Physicians Desk Reference (PDR).