F73 — Profound intellectual disabilities
F73 is a billable, specific ICD-10-CM code for profound intellectual disabilities. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- IQ level below 20-25
- Profound mental subnormality
Risk adjustment
F73 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
F73 is named in 13 Medicare coverage policies — 10 listing it as supporting medical necessity, and 3 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
- A56865Billing and Coding: Psychiatric Inpatient Hospitalizationnot covered
- A56937Billing and Coding: Psychiatry and Psychology Servicesnot covered
- A57052Billing and Coding: Psychiatric Inpatient Hospitalization
How F73 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 F73.
- Idiot, idiocy(congenital)
- I.Q.›under 20
- Disability, disabilities›intellectual›profound(I.Q. under 20)
Questions about F73
- Is F73 a billable ICD-10-CM code?
- Yes. F73 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does F73 sit in the tabular list?
- Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Intellectual Disabilities (F70-F79).