for Dissociative Amnesia the DSM 5 has these diagnostic criteria.....

Dissociative Amnesia 300.12 (F44.0)

A. An inability to recall important autobiographical information, usually of a traumatic or stressful nature, that is inconsistent with ordinary forgetting.

Note: Dissociative Amnesia most often consists of localized or selective amnesia for a specific event or events or generalized amnesia for identity and life history.

B. the symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.

C. The disturbance is not attributable to the physiological effects of a substance (e.g. alcohol or other drug of abuse, a medication) or a neurological or other medical condition (e.g. partial complex seizures, transient global amnesia, sequalae of a closed head injury/traumatic brain injury, or other neurological condition)

D. The disturbance is not better explained by dissociative identity disorder, posttraumatic stress disorder, acute stress disorder, somatic symptom disorder, or major or mild neurocognitive disorder.

Coding note: the code for dissociative amnesia without dissociative Fugue is 300.12 (F44.0) The code for dissociative amnesia with dissociative Fugue is 300.13 (F44.1)

Specify if:
300.13 (F44.1) with dissociative Fugue: Apparently purposeful travel or bewildered wandering that is associated with amnesia for identity or for other important autobiographical information.

The DSM covers the same categories as already stated for DID and depersonalization/derealization disorder.