F80.81Childhood onset fluency disorder

F80.81 is the ICD-10-CM diagnosis code for childhood onset fluency disorder. It belongs to category F80 (specific developmental disorders of speech and language), block F80-F89 (pervasive and specific developmental disorders) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F80.8 (other developmental disorders of speech and language), F80.81 is specifically for childhood onset fluency disorder. Related codes cover social pragmatic communication disorder (F80.82) and other developmental disorders of speech and language (F80.89).

Don't report F80.81 together with the conditions in its Excludes1 note: adult onset fluency disorder (F98.5), fluency disorder in conditions classified elsewhere (R47.82) and fluency disorder (stuttering) following cerebrovascular disease (I69. with final characters -23).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 315.35 (childhood onset fluency disorder).