ICD-10-CM 2027
ICD-10 code for Homicidal ideation
From the official ICD-10-CM alphabetic index entry “Ideation › homicidal”. Page updated September 29, 2026.
About coding Homicidal ideation
The ICD-10-CM code for Homicidal ideation is R45.850 (Homicidal ideations).
Within R45.85 (Homicidal and suicidal ideations), R45.850 is specifically for Homicidal ideations. Related codes cover suicidal ideations (R45.851).
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 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), 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 Homicidal ideation ICD-10 codes
What is the ICD-10 code for Homicidal ideation?
- R45.850 — Homicidal ideations.
Is R45.850 billable?
- Yes. R45.850 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R45.850 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is R45.850 a CC or MCC?
- No. R45.850 is neither a CC nor an MCC under MS-DRG v44.0.