Is F84.3 a billable ICD-10-CM code?

Yes. F84.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does F84.3 sit in the tabular list?

Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Pervasive and specific developmental disorders (F80-F89).

What cannot be coded together with F84.3?

F84.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

F84.3

F84.3 — Other childhood disintegrative disorder

Billable / specific codeICD-10-CM

F84.3 is a billable, specific ICD-10-CM code for other childhood disintegrative disorder. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Asperger's syndrome (F84.5)
Autistic disorder (F84.0)
Rett's syndrome (F84.2)

Use additional code

Add a secondary code to capture the detail described below.

code to identify any associated neurological condition.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Dementia infantilis
Disintegrative psychosis
Heller's syndrome
Symbiotic psychosis

Other codes that can never be billed with F84.3

These codes carry an Excludes1 note pointing at F84.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F84.3 alone.

F84.2Rett's syndrome

Risk adjustment

F84.3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

F84.3 is named in 14 Medicare coverage policies — 13 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
A56614Billing and Coding: Psychiatric Inpatient Hospitalization
A56756Billing and Coding: Home Health - Psychiatric Care
A56865Billing and Coding: Psychiatric Inpatient Hospitalization

How F84.3 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to F84.3.

Heller's disease or syndrome
Dementia›infantile, infantilis
Disorder›childhood disintegrative NEC
Disorder›disintegrative, childhood NEC
Psychosis, psychotic›disintegrative(childhood)
Psychosis, psychotic›symbiotic(childhood)

Related codes at this level

Codes that share F84. If F84.3 is not quite right, the correct code is usually one of these.

Questions about F84.3

Is F84.3 a billable ICD-10-CM code?: Yes. F84.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does F84.3 sit in the tabular list?: Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Pervasive and specific developmental disorders (F80-F89).
What cannot be coded together with F84.3?: F84.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.