Because DSM is for diagnosing mental diseases and homosexuality is not a mental disease.
The DSM IV Diagnostic manual was first published in 1994. The DSM IV - TR is a text revision published in 2000. So the most current edition is indeed the DSM IV - TR. The DSM V is due in 2012 and may be very different from the current style. See http://www.psych.org/mainmenu/research/dsmiv/dsmivtr.aspx for more info.
There is no specific Axis II DSM code for Attention Deficit Hyperactivity Disorder (ADHD). In the DSM-5, ADHD is classified as a neurodevelopmental disorder and is diagnosed on Axis I.
Axis I
DSM stands for Diagnostic and Statistical Manual of Mental Disorders, released by the American Psychiatric Association. DSM-IV and DSM-V are just the fourth and fifth editions of the manual, respectively. The fourth edition was released in 1994, and the fifth edition is currently in the planning and consultation phase, on its way to being published. So the fifth edition is just an update to the previous edition.
A link to the complete DSM-IV online is in the "related links" section below. ...(improving here...this link is broken and attempts to lead to a subscription site. I suggest using the DSM V which is online with revisions pending)
homosexuality.
homosexuality.
A diagnosis from the DSM-4.
substance intoxication
dissociative disorder
substance withdrawal
DSM is a book of mental illness symptoms and diagnosis and it is used by mental health professionals to diagnose such illnesses
Personality Disorder
5
five
When using the DSM-IV-TR the V code 71.09 means: V71.09 No Diagnosis or Condition on Axis I No Diagnosis on Axis II
Yes, schizophrenia is an official diagnosis in the DSM-IV-TR and the ICD-10, as well as being accepted as an official diagnosis by most clinicians.