Quick reference
- When to use
- Use F50.89 when the client meets full criteria for Other Specified Feeding or Eating Disorder. Specify severity level per DSM-5 guidelines. For anorexia, base severity on BMI. For bulimia/BED, base on frequency of compensatory behaviors or binge episodes.
- Duration
- Anorexia: ongoing until remission criteria met. Bulimia/BED: behaviors must occur at least weekly for 3 months. Partial remission: previously met full criteria, some symptoms persist. Full remission: no criteria met for sustained period.
- Session codes
- Pair with CPT 90837 (60-min, often needed for meal planning + therapy). 90834 for maintenance. 96127 for EDE-Q screening. Medical monitoring may require coordination with primary care. FBT: 90847.
- Key indicators
- Restriction, bingeing, or purging behaviors • Body image disturbance • Weight/shape overvaluation • Medical complications • Functional impairment • Specific BMI or behavior frequency thresholds
What F50.89 represents
OSFED (formerly EDNOS) includes clinically significant eating disorder presentations that don't meet full criteria for anorexia, bulimia, or binge eating disorder. Examples include atypical anorexia, subthreshold bulimia, purging disorder, and night eating syndrome.
Key diagnostic criteria
Eating disorder symptoms causing distress/impairment but not meeting full criteria for specific disorders. Common presentations:
- Atypical anorexia nervosa (significant weight loss but normal/above normal weight)
- Bulimia nervosa of limited frequency/duration
- Binge eating of limited frequency/duration
- Purging disorder
- Night eating syndrome
Documentation essentials
Document specific eating behaviors, the reason full criteria aren't met, and functional impact.
Differential diagnosis
Consider all specific eating disorders. Rule out medical causes.
Treatment planning
Treatment similar to the specific disorder most closely resembled. CBT-E, nutritional counseling.
Insurance & billing
May require detailed documentation of clinical significance.
Updates & changes
OSFED replaced EDNOS from DSM-IV.
Documentation pitfalls
Don't minimize OSFED – it can be just as severe and deadly as specific eating disorders.
References
- American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).