F33.1

Major depressive disorder, recurrent, moderate

Major depressive disorder, recurrent, moderate (F33.1) is a clinical classification representing a longitudinal pattern of mood disturbance characterized by at least two major depressive episodes where the current episode meets the criteria for moderate severity. In the 2026 ICD-10-CM system, 'moderate' indicates that the number of symptoms and the degree of functional impairment are intermediate between 'mild' (where few symptoms in excess of those required to make the diagnosis are present) and 'severe' (where symptoms are numerous and significantly interfere with daily life or include psychosis). Patients with this diagnosis often experience a persistent low mood and a pervasive loss of interest or pleasure (anhedonia) that significantly impacts their social, occupational, and domestic activities. The recurrence of these episodes suggests a chronic vulnerability to mood dysregulation, often requiring a combination of pharmacological and psychotherapeutic intervention to prevent relapse.

Clinical Symptoms

  • Persistent depressed mood nearly every day
  • Marked diminished interest or pleasure in all or almost all activities
  • Significant weight loss or weight gain without dieting
  • Insomnia or hypersomnia nearly every day
  • Psychomotor agitation or retardation
  • Fatigue or loss of energy nearly every day
  • Feelings of worthlessness or excessive and inappropriate guilt
  • Diminished ability to think or concentrate
  • Indecisiveness nearly every day
  • Recurrent thoughts of death or suicidal ideation
  • Significant social and occupational impairment

Common Causes

  • Genetic predisposition involving multiple gene variants
  • Dysregulation of neurotransmitters including serotonin, norepinephrine, and dopamine
  • Hyperactivity of the hypothalamic-pituitary-adrenal (HPA) axis
  • Neuroanatomical changes in the prefrontal cortex and hippocampus
  • History of childhood trauma or adverse life events
  • Chronic psychological stress
  • Comorbid medical or endocrine conditions

Documentation & Coding Tips

Explicitly state the number of previous episodes to support the recurrent designation.

Example: Patient presents with symptoms consistent with a major depressive episode, including anhedonia and sleep disturbance for 4 weeks. Patient has a documented history of two prior treated depressive episodes in 2019 and 2022, confirming the recurrent nature of the disorder. This visit focuses on managing the current moderate symptoms using psychotherapy and medication adjustments.

Billing Focus: The documentation of at least one prior distinct episode is required to move from the F32 (single) to F33 (recurrent) family of codes.

Quantify the severity using standardized tools like the PHQ-9 to justify the moderate classification.

Example: The patient completed a PHQ-9 screen today with a total score of 16, which falls within the range for moderate to moderately severe depression. Symptoms include depressed mood most days and a 5 percent unintentional weight loss over the last month. Functional impairment is noted in social interactions but the patient remains capable of basic self-care.

Billing Focus: The term moderate must be explicitly linked to the diagnosis (F33.1) in the assessment to satisfy the fourth character specificity.

Document the absence of manic or hypomanic episodes to differentiate from Bipolar Disorder.

Example: Evaluation of the current moderate recurrent depressive episode reveals no history of elevated mood, decreased need for sleep, or racing thoughts that would suggest a manic or hypomanic phase. The diagnosis remains Major Depressive Disorder, recurrent, moderate. Current medication regimen of Escitalopram 20mg is maintained.

Billing Focus: Excluding mania ensures the code is not misaligned with Bipolar codes (F31.x), which are billed differently and represent different clinical pathways.

Describe specific functional limitations caused by the depression to support the moderate severity level.

Example: Patient reports that their recurrent depression is currently at a moderate level, manifesting as significant difficulty concentrating at work and withdrawal from family activities. Unlike the previous mild episode, the patient is now struggling to complete daily tasks but does not require hospitalization or demonstrate psychotic features.

Billing Focus: Clinical descriptions of functional impact provide a qualitative basis for the moderate severity level, complementing quantitative scores.

Clearly identify the current status of the condition, distinguishing it from remission.

Example: Patient is currently in the midst of a moderate recurrent episode. This is not a state of remission, as the full criteria for a major depressive episode are met with symptoms causing clinically significant distress. The plan is to increase the dosage of Sertraline and schedule follow-up in two weeks.

Billing Focus: Differentiating an active episode from partial (F33.41) or full (F33.42) remission is essential for accurate ICD-10-CM code selection.

Relevant CPT Codes

Related Diagnoses

Hierarchy