CPT 90853 + ICD-10 F50.01: Anorexia nervosa, restricting type
Group psychotherapy billed with Anorexia nervosa, restricting type — documentation requirements, denial reasons, modifiers, and reimbursement context.
CPT Code
90853
Group psychotherapy
ICD-10 Code
F50.01
Anorexia nervosa, restricting type
Common Modifiers
Compatibility Notes
Group therapy for anorexia nervosa may be part of a day program or intensive outpatient program. Per-participant billing required. Medical monitoring and prior authorization are expected for eating disorder group programs. Most payers require group eating disorder treatment to be part of a structured program.
Documentation Required
- ✓Per-participant attendance and AN restricting type diagnosis
- ✓Medical stability per participant
- ✓Group eating disorder content (body image, food thought challenging)
- ✓Prior authorization per participant
Common Denial Reasons
- ✗Group billed as single claim
- ✗Missing medical monitoring documentation per participant
- ✗No prior authorization
- ✗Group structure not part of documented treatment program
Applicable Modifiers
Reimbursement Notes
OON UCR $50–$90 per participant. Eating disorder group therapy most commonly occurs in IOP or PHP settings; document program structure clearly.
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