ICD-10-CM 2027
ICD-10 code for observation following attempt self-poisoning
Encounter for observation for suspected toxic effect from ingested substance ruled out
From the official ICD-10-CM alphabetic index entry “Self-poisoning › observation following (alleged) attempt”. Page updated September 29, 2026.
About coding observation following attempt self-poisoning
The ICD-10-CM code for observation following attempt self-poisoning is Z03.6 (Encounter for observation for suspected toxic effect from ingested substance ruled out).
Within Z03 (encounter for medical observation for suspected diseases and conditions ruled out), Z03.6 is specifically for encounter for observation for suspected toxic effect from ingested substance ruled out. Related codes cover suspected maternal and fetal conditions ruled out (Z03.7) and observation for other suspected diseases and conditions ruled out (Z03.8).
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 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 observation following attempt self-poisoning ICD-10 codes
What is the ICD-10 code for observation following attempt self-poisoning?
- Z03.6 — Encounter for observation for suspected toxic effect from ingested substance ruled out.
Is Z03.6 billable?
- Yes. Z03.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z03.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z03.6 as a principal diagnosis.
Is Z03.6 a CC or MCC?
- No. Z03.6 is neither a CC nor an MCC under MS-DRG v44.0.