I don't know exactly but DSM-4-TR probably lists a few thousand diagnoses, many overlapping.
Personality Disorder
It depends on who is doing the "qualifying", but the DSM-IV is generally accepted as the Standard for US doctors making mental health diagnoses. http://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/psychiatry/anxiety/anxiety.htm
DSM-V
Munchausen Syndrome is not recognized in the DSM-IV. It is a problem but is not recognized as a diagnosable mental illness.
DSM-4 WAS PUBLISHED IN 1994
The singular form of diagnoses is diagnosis.
I don't see it in the DSM II published in 1968. It is in the DSM III published in 1980.
The most widely used scheme today for classifying and diagnosing psychological disorders throughout the world is the Diagnostic and Statistical Manual of Mental Disorders (DSM) published by the American Psychiatric Association. The DSM provides criteria for diagnosing various mental health conditions and is used by clinicians and researchers to ensure consistency in diagnosis and treatment.
Their could be any number of possible diagnoses; it's a common problem.
Does a physchotherapist give diagnoses
Far too vague for diagnoses. Far too many possibilities.