SESSION WATCH
Died HOUSE · SESSION 2026

No. CS/HB 411

Developmental Disabilities
Send via email
SPONSOR
Human Services Subcommittee; Maggard
FILED BY
Randall Maggard — District 54, Republican [search donations]
EFFECTIVE
7/1/2026
DIED IN
Health & Human Services Committee

Filed under Healthcare.

PROVIDED SUMMARY

Developmental Disabilities; Revises definition of term "developmental disability"; defines "Tatton-Brown-Rahman syndrome ."

Full bill text →

Plain English Summary

AI-GENERATED
Adds Tatton-Brown-Rahman syndrome to the developmental disability definition.

Florida's chapter 393 defines 'developmental disability' by a list of qualifying conditions. This bill adds Tatton-Brown-Rahman syndrome, a genetic disorder, to that list alongside intellectual disability, cerebral palsy, autism, Down syndrome, and others already named.

The bill also defines the syndrome itself: a disorder caused by a DNMT3A gene mutation, marked by intellectual disability ranging from mild to severe, an unusually large head, and above-average height and weight for the person's age.

Qualifying also requires at least one of eight listed features -- among them facial differences, joint hypermobility, seizures, or behavioral deficits -- appearing in infancy, childhood, or adolescence.

KEY PROVISIONS
§ 1 Adds Tatton-Brown-Rahman syndrome to the qualifying condition list majors. 393.063

AITatton-Brown-Rahman syndrome is added alongside intellectual disability, cerebral palsy, autism, Down syndrome, and other named conditions as a disorder that can qualify someone as having a developmental disability under this chapter.

“Down syndrome, Phelan-McDermid syndrome, Prader-Willi syndrome, or Tatton-Brown-Rahman syndrome”
§ 2 Defines the syndrome by its genetic cause and core clinical features moderates. 393.063

AIThe new definition ties Tatton-Brown-Rahman syndrome to a mutation in the DNMT3A gene and requires intellectual disability of any severity from mild to severe, plus macrocephaly, to be typified as the syndrome.

“a disorder caused by a mutation in the DNMT3A gene typified by mild to severe intellectual disability, macrocephaly” bill text, line 23 →
§ 3 Sets a quantitative overgrowth threshold for diagnosis moderates. 393.063

AIThe definition requires stature and weight at least two standard deviations above the mean for the person's age and sex, a specific, measurable overgrowth criterion rather than a general description.

“stature and weight that is greater than or equal to two or more standard deviations above the mean for the person's age and sex” bill text, line 25 →
TIMELINE
3/13/2026
Died in Health & Human Services Committee
2/16/2026
Now in Health & Human Services Committee
2/16/2026
Referred to Health & Human Services Committee
2/13/2026
1st Reading (Committee Substitute 1)
2/13/2026
CS Filed
2/13/2026
Laid on Table under Rule 7.18(a)
2/13/2026
Reported out of Human Services Subcommittee
2/12/2026
Favorable with CS by Human Services Subcommittee
2/10/2026
PCS added to Human Services Subcommittee agenda
1/13/2026
1st Reading (Original Filed Version)
11/18/2025
Now in Human Services Subcommittee
11/18/2025
Referred to Health & Human Services Committee
11/18/2025
Referred to Health Care Budget Subcommittee
11/18/2025
Referred to Human Services Subcommittee
11/12/2025
Filed
9 EARLIER →
STATUTES IT CHANGES
s. 393.063
+84 / −1
s. 393.063
+0 / −0
STAFF ANALYSES