Quick reference
- When to use
- Use F42.8 when the client presents with obsessions, compulsions, or related symptoms consistent with Other Obsessive-Compulsive and Related Disorders that are time-consuming (>1 hour/day) or cause significant distress or impairment. Specify insight level.
- Duration
- No minimum duration specified in DSM-5, but symptoms should be persistent and not transient. Track severity with Y-BOCS at baseline and every 4-6 sessions. Document insight level (good/fair, poor, absent).
- Session codes
- Pair with CPT 90837 (60-min, preferred for ERP sessions). 90834 for maintenance. 90791 for initial evaluation. 96127 for Y-BOCS screening. Intensive programs may use 90837 multiple times per week.
- Key indicators
- Intrusive, unwanted thoughts (obsessions) • Repetitive behaviors or mental acts (compulsions) • Time-consuming rituals • Distress when unable to perform rituals • Insight varies • Significant functional impact
What F42.8 represents
This category captures OCD-related presentations that don't fit neatly into other specific categories, including body-focused repetitive behavior disorders and obsessional jealousy.
Key diagnostic criteria
Symptoms characteristic of OCD-related disorders that cause significant distress or impairment but don't meet full criteria for a more specific OCD-related diagnosis.
Documentation essentials
Document specific symptoms, their OCD-related nature, and functional impact.
Differential diagnosis
Consider all specific OCD-related disorders before using this code.
Treatment planning
Treatment approaches similar to OCD: CBT with habit reversal training, SSRIs.
Insurance & billing
May require detailed documentation of clinical significance.
Updates & changes
Monitor for reclassification of OCD-related subtypes.
Documentation pitfalls
Ensure thorough assessment before using this residual category.
References
- American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).

