ICD-10-CM 2027
ICD-10 code for Hemitremor
From the official ICD-10-CM alphabetic index entry “Hemitremor”. Page updated September 29, 2026.
About coding Hemitremor
The ICD-10-CM code for Hemitremor is R25.1 (Tremor, unspecified).
Within R25, choose R25.1 (Tremor, unspecified) only when documentation doesn't support a more specific option: abnormal head movements (R25.0), cramp and spasm (R25.2), Fasciculation (R25.3), other abnormal involuntary movements (R25.8) and unspecified abnormal involuntary movements (R25.9).
Don't report R25.1 together with the conditions in its Excludes1 note: chorea NOS (G25.5), essential tremor (G25.0), hysterical tremor (F44.4) and intention tremor (G25.2).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for R25.1)
Common questions about Hemitremor ICD-10 codes
What is the ICD-10 code for Hemitremor?
- R25.1 — Tremor, unspecified.
Is R25.1 billable?
- Yes. R25.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R25.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R25.1 as a principal diagnosis.
Is R25.1 a CC or MCC?
- No. R25.1 is neither a CC nor an MCC under MS-DRG v44.0.