CPT 90837 + ICD-10 F50.02: Anorexia nervosa, binge-eating/purging type
Psychotherapy, 60 minutes billed with Anorexia nervosa, binge-eating/purging type — documentation requirements, denial reasons, modifiers, and reimbursement context.
CPT Code
90837
Psychotherapy, 60 minutes
ICD-10 Code
F50.02
Anorexia nervosa, binge-eating/purging type
Compatibility Notes
Used for therapists treating the binge-eating/purging subtype of anorexia nervosa. This presentation combines restrictive eating with episodes of binge eating and/or purging behaviors. Medical monitoring is essential and most payers expect documented coordination with a physician. Prior authorization is the norm for eating disorder treatment beyond the initial evaluation.
Documentation Required
- ✓Session start and stop times confirming 53+ minutes
- ✓AN binge-eating/purging type diagnosis with DSM-5 criteria documented
- ✓Medical stability confirmed (weight, electrolytes, EKG if purging is active)
- ✓Treatment team coordination with physician and/or dietitian documented
- ✓Evidence-based modality in use (CBT-E, FBT)
- ✓Prior authorization number on the superbill
Common Denial Reasons
- ✗Inadequate medical monitoring documentation — purging type carries cardiac and metabolic risks requiring active medical oversight
- ✗Missing prior authorization
- ✗Level of care mismatch — purging behaviors may indicate need for higher-level care
- ✗Diagnosis coded as F50.9 when F50.02 criteria are clearly met
Applicable Modifiers
Reimbursement Notes
OON UCR $130–$210. Eating disorder parity protections apply in many states. Expect appeals processes for initial authorization denials; document the multidisciplinary treatment team structure clearly.
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