Documentation of Major Depressive Disorder in Remission
Yes, document the diagnosis as "Major depressive disorder, in full remission" rather than removing the depression history from the problem list. A PHQ-9 score of 0 during ongoing maintenance therapy represents remission of a documented depressive episode, not absence of disease. 1
Why Remission Status Must Be Documented
Prior treatment confirms DSM-5 criteria were met for a major depressive episode (depressed mood or anhedonia plus additional symptoms for ≥2 weeks with functional impairment), establishing a permanent diagnostic history. 1
A PHQ-9 of 0 indicates symptom absence, not disease absence. Patients who previously required antidepressant therapy retain their MDD diagnosis even when asymptomatic, because the condition carries substantial recurrence risk. 1
Erasing the diagnosis by documenting "no history of depression" eliminates critical risk stratification information needed for future clinical decision-making. 1
Treatment Phase Classification
Your patient is currently in the maintenance phase of treatment:
- Acute phase (6–12 weeks): Initial symptom reduction 2, 1
- Continuation phase (4–9 months after response): Prevents relapse of the same episode 2, 3, 1
- Maintenance phase (≥1 year): Prevents recurrence of new episodes 2, 3, 1
Patients achieving full remission while continuing therapy are in continuation or maintenance phase, where ongoing treatment prevents relapse despite symptom absence. 1
Relapse vs. Recurrence Risk
- After one major depressive episode, the probability of recurrence is approximately 50%. 4
- After two episodes, recurrence risk increases to 70%; after three episodes, it reaches 90%. 4
- Relapse = return of symptoms during acute or continuation phases (same episode). 2, 1
- Recurrence = emergence of symptoms during maintenance phase (new distinct episode). 2, 1
Specific Documentation Recommendations
Record as:
- "Major depressive disorder, single episode, in full remission" if only one episode has occurred 1
- "Major depressive disorder, recurrent, in full remission" if multiple episodes have occurred 1
Do not:
- Remove depression from the active problem list 1
- Document "resolved" or "no history of depression" 1
- Discontinue therapy solely because PHQ-9 = 0 1
Ongoing Treatment Duration
After a first episode: Continue treatment for 4–9 months after achieving remission. 3, 5, 1
After two or more episodes: Consider years of maintenance therapy, potentially lifelong. 4, 3, 1
Systematic reviews demonstrate that continued antidepressant treatment after remission protects against recurrence and relapse. 4
Discontinuing medication at the end of the acute phase does not prevent relapse. 4
Monitoring Strategy During Remission
Conduct structured follow-up using PHQ-9 at regular intervals; scores ≥5 signal emerging symptoms. 1
PHQ-9 scores ≥10 denote a new depressive episode requiring reassessment and possible treatment intensification. 1
Screen at each visit for new stressors, medication adherence, and substance use that may precipitate relapse. 1
Monthly monitoring for 6–12 months post-remission is appropriate, with extension up to 2 years for recurrent depression. 1
Common Pitfalls to Avoid
Do not interpret symptom absence as permission to stop treatment prematurely. More than 60% of Americans on antidepressant therapy have been taking it longer than two years, and 14% for 10 years or longer, reflecting the chronic nature of MDD. 4
Do not rely solely on patient recall to document treatment history. Proper documentation requires clinical records such as pharmacy, hospital, or health records to confirm prior episodes and treatment adherence. 6
Do not confuse "remission" with "response." Response typically means ≥50% reduction in symptom severity, while remission requires near-complete symptom absence (PHQ-9 ≤4 or HAM-D ≤7). 2, 7, 8