ICD-10-CM 2027
ICD-10 code for suicidal ideation
From the official ICD-10-CM alphabetic index entry “Ideation › suicidal”. Page updated September 29, 2026.
About coding suicidal ideation
The ICD-10-CM code for suicidal ideation is R45.851 (Suicidal ideations).
Within R45.85 (Homicidal and suicidal ideations), R45.851 is specifically for suicidal ideations. Related codes cover Homicidal ideations (R45.850).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about suicidal ideation ICD-10 codes
What is the ICD-10 code for suicidal ideation?
- R45.851 — Suicidal ideations.
Is R45.851 billable?
- Yes. R45.851 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R45.851 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R45.851 as a principal diagnosis.
Is R45.851 a CC or MCC?
- R45.851 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.