DSM-5-TR versus what you learned: the changes that actually appear on the NCE.
If your diagnosis course used DSM-5 or an older edition, a handful of TR revisions matter for the exam. Here they are, and the ones you can ignore.
By Dr. Andrew Wichterman · September 20, 2026 · 4 min read · Updated October 4, 2026
The Text Revision is mostly text. A few changes are testable, and older prep materials get them wrong.
New: prolonged grief disorder
Added in the TR to the trauma- and stressor-related chapter. Intense yearning or preoccupation with the deceased at least twelve months after the death (six for children), with impairment. This is the change most likely to appear, usually as a differential against major depression or normal bereavement.
The timeframes the exam tests around it
Prolonged grief disorder is almost always presented as a differential, and the differential turns on time and content. Normal bereavement has no fixed limit and softens over months. Adjustment disorder begins within three months of a stressor and resolves within six months of the stressor ending. Major depressive disorder needs two weeks of symptoms, and since DSM-5 removed the bereavement exclusion, it can be diagnosed during grief when the picture is depressive: pervasive low mood rather than waves of yearning, worthlessness rather than guilt about the deceased, and a self-critical focus rather than a preoccupation with the lost person.
Prolonged grief disorder requires twelve months in adults and six in children and adolescents, with daily yearning or preoccupation plus at least three of its specific symptoms: identity disruption, disbelief, avoidance of reminders, intense emotional pain, difficulty reintegrating, numbness, meaninglessness and loneliness. An item that describes intense grief at month four is not describing prolonged grief disorder no matter how severe it sounds. Read the clock first, then the content.
Changed: suicidal behavior and nonsuicidal self-injury codes
The TR added codes for suicidal behavior and NSSI that can be recorded alongside any diagnosis. On the exam this appears as the principle that self-harm is assessed and documented in its own right, not assumed to be part of a mood or personality diagnosis.
Clarified: unspecified mood disorder, autism criteria wording, gender terminology
Unspecified mood disorder returned for presentations that do not fit bipolar or depressive categories. Autism criteria were reworded for clarity without changing the diagnosis. Language around gender was updated: "desired gender" became "experienced gender," and "cross-sex" became "gender-affirming." Items use the current language; know it.
The other renamings and the text that moved
Intellectual disability is now written as intellectual developmental disorder, with intellectual disability in parentheses, to align with the ICD-11 term. The severity levels still rest on adaptive functioning, not IQ score alone, a point the exam has tested since 2013. The TR also revised criteria wording for several diagnoses without changing their thresholds: autism spectrum disorder, bipolar disorders, delirium, avoidant/restrictive food intake disorder and others. If an older book lists criteria for these, the substance is still right; only the phrasing is dated.
The largest change in the TR is not a diagnosis but text. Every disorder's discussion of culture was reviewed, and the manual added material on how racism and discrimination affect presentation, diagnosis and misdiagnosis. On the exam this appears as the principle that a diagnosis is made with cultural context, that the Cultural Formulation Interview exists for that purpose, and that a presentation which is normative in the client's culture is not a symptom. The TR is the current edition; the ICD-10-CM codes printed in it are what insurers require, and updated codes for the new material appear in it as well.
How to update an old book in an afternoon
If your diagnosis text is DSM-5 from 2013, you do not need to replace it. Write the TR changes on one page and clip it inside the cover: prolonged grief disorder with its timeframes and symptom count; the suicidal behavior and NSSI codes; unspecified mood disorder; the gender terminology; intellectual developmental disorder. Then check the four or five criteria sets you are shakiest on against a current source, because reworded criteria read differently even when they mean the same thing.
If your text predates 2013, the page is longer and the risk is real. The substance use disorder merger, the removal of the multiaxial system and the GAF, the separation of OCD and trauma disorders from anxiety, the new chapters on neurodevelopmental and neurocognitive disorders, and the renaming of dysthymia as persistent depressive disorder are all things the exam treats as settled. Study diagnosis from the lessons here or from a source that says DSM-5-TR, and use the old book for theory, where nothing has moved.
What did not change and still trips people
The DSM-5 changes many older materials still miss: the collapse of abuse and dependence into one substance use disorder with severity levels; hoarding, excoriation and binge-eating as their own diagnoses; the removal of the bereavement exclusion; disruptive mood dysregulation disorder; the four PTSD clusters; and autism as a single spectrum. If your prep book predates 2013 on these, it will cost you items.
Check the current handbook. Exam logistics, fees and policies change. Confirm specifics against the NBCC candidate handbook and your state board's current rules. Aligned to the current NCE blueprint, valid for exams through June 30, 2027.
Study from a source that says DSM-5-TR on the cover, or from lessons that cite it. The exam does.