ICD-10-CM 2027
ICD-10 code for observation encounter
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Encounter (with health service) (for) › observation (for) (ruled out)”. Page updated September 29, 2026.
About coding observation encounter
The official ICD-10-CM index doesn't give a single default code for observation encounter; the code depends on the details below.
More specific observation encounter codes (official index)
- alarm, without findings
- apnea Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out
- bradycardia Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out
- oximeter Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out
- condition suspected related to home physiologic monitoring device Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out
- newborn Z05.81 — Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
- apnea alarm Z05.81 — Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
- bradycardia alarm Z05.81 — Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
- malfunction of home cardiorespiratory monitor Z05.81 — Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
- non-specific findings home physiologic monitoring device Z05.81 — Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
- pulse oximeter alarm without findings Z05.81 — Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
- exposure to (suspected)
- anthrax Z03.810 — Encounter for observation for suspected exposure to anthrax ruled out
- biological agent NEC Z03.818 — Encounter for observation for suspected exposure to other biological agents ruled out
- malfunction of home cardiorespiratory monitor Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out
- non-specific findings home physiologic monitoring device Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out