What insurance policy changes affect code Z13.21?

There are 2 tracked policy changes affecting code Z13.21, including updates from Aetna. Each change may modify coverage criteria, reimbursement rates, or prior-authorization requirements.

Which payers have updated policy for code Z13.21?

Payers that have issued tracked updates for code Z13.21 include: Aetna.

How do I get notified when code Z13.21 policy changes?

Create a free account at PolicyChanges.app and save a search filtered to code Z13.21. You will get an email when new policy changes reference this code: daily or weekly, your choice, on every plan.

Why do payers change policies for code Z13.21?

Payers revise policies for individual billing codes to align with updated clinical guidelines, CMS rule changes, fraud and abuse prevention measures, or network cost-management goals. Changes can affect medical necessity criteria, place-of-service restrictions, bundling rules, or whether a code requires prior authorization.

PAYER POLICY CHANGES

Z13.21 Insurance Policy Changes

ICD-10 Z13.21 is officially defined as "Encounter for screening for nutritional disorder." code Z13.21 is referenced in 2 tracked payer policy changes from Aetna. For billers and coders, staying current on payer-specific coverage criteria, reimbursement rules, and prior-authorization requirements for code Z13.21 is critical to clean claim submission. Each entry below links to the full policy analysis with effective dates and action steps.

Only a small number of policies match this filter. Check back as coverage expands.

Aetna · Identified Aug 17, 2026Medium impact
Hair Analysis (CPB 0300, reviewed 2026-04-17)
Aetna considers chemical hair analysis experimental, investigational or unproven, except for diagnosis of suspected chronic arsenic poisoning, and considers hair analysis of brain-derived neurotrophic factor as a predictor of developing psychopathological symptoms in childhood experimental, investigational or unproven. Microscopic evaluation of hair structure (trichogram) may be medically necessary as part of the work-up of members with alopecia or abnormal-appearing or abnormally growing hair.
Aetna · Identified Aug 13, 2026Medium impact
Eating Disorders (CPB 0511, reviewed 2026-08-04)
Aetna considers these services medically necessary for members with anorexia nervosa or bulimia nervosa: medical evaluation with history and physical examination, psychiatric or psychological consultation and testing, blood count and serum chemistry, albumin and prealbumin, liver function tests, electrocardiography, urinalysis, thyroid function testing (TSH), bone density measurement for evaluation of anorexic members, and LH, FSH and estradiol for women with amenorrhea or oligomenorrhea. Treatment considered medically necessary includes nutritional counseling, psychotherapy (such as cognitive behavioral therapy, dialectical behavior therapy, family-based, interpersonal and psychodynamic psychotherapy), and enteral nutrition as a last resort for the treatment of anorexia nervosa. Self-administered pharmacotherapies are managed under the pharmacy benefit. The policy lists CPT and HCPCS codes covered if selection criteria are met, and codes not covered for the indications listed. Aetna considers a long list of services experimental, investigational or unproven for anorexia nervosa, bulimia nervosa and binge-eating disorder, including brain imaging, EEG, routine screening of asymptomatic adolescents and adults for eating disorders, acupuncture, deep brain stimulation, electroconvulsive therapy, repetitive transcranial magnetic stimulation, cannabinoids, oxytocin and ghrelin agonists.

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Hair Analysis (CPB 0300, reviewed 2026-04-17)

Eating Disorders (CPB 0511, reviewed 2026-08-04)

What insurance policy changes affect code Z13.21?

Which payers have updated policy for code Z13.21?

How do I get notified when code Z13.21 policy changes?

Why do payers change policies for code Z13.21?