ICD-10-CM 2027
ICD-10 code for criminal assault observation
From the official ICD-10-CM alphabetic index entry “Observation (following) (for) (without need for further medical care) › criminal assault”. Page updated September 29, 2026.
About coding criminal assault observation
The ICD-10-CM code for criminal assault observation is Z04.89 (Encounter for examination and observation for other specified reasons).
Within Z04.8, choose Z04.89 (for other specified reasons) only when documentation doesn't support a more specific option: of victim following forced sexual exploitation (Z04.81) and of victim following forced labor exploitation (Z04.82).
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 criminal assault observation ICD-10 codes
What is the ICD-10 code for criminal assault observation?
- Z04.89 — Encounter for examination and observation for other specified reasons.
Is Z04.89 billable?
- Yes. Z04.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z04.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z04.89 as a principal diagnosis.
Is Z04.89 a CC or MCC?
- No. Z04.89 is neither a CC nor an MCC under MS-DRG v44.0.