ICD-10-CM 2027
ICD-10 code for Impediment
From the official ICD-10-CM alphabetic index entry “Impediment, speech”. Page updated September 29, 2026.
About coding Impediment
The ICD-10-CM code for Impediment is R47.9 (Unspecified speech disturbances). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R47.9.
Within R47, choose R47.9 (Unspecified speech disturbances) only when documentation doesn't support a more specific option: dysphasia and aphasia (R47.0), dysarthria and anarthria (R47.1) and other speech disturbances (R47.8).
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.
More specific Impediment codes (official index)
Common questions about Impediment ICD-10 codes
What is the ICD-10 code for Impediment?
- R47.9 — Unspecified speech disturbances. More specific codes apply when the documentation supports them: F98.8, R47.81, R47.89.
What is the ICD-10 code for psychogenic impediment?
- F98.8 — Other specified behavioral and emotional disorders with onset usually occurring in childhood and adolescence.
What is the ICD-10 code for slurring impediment?
- R47.81 — Slurred speech.
Is R47.9 billable?
- Yes. R47.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R47.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R47.9 as a principal diagnosis.
Is R47.9 a CC or MCC?
- No. R47.9 is neither a CC nor an MCC under MS-DRG v44.0.