Z03
⚠ Non-billable
Encounter for medical observation for suspected diseases and conditions ruled out
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z03
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Z03?
ICD-10-CM code Z03 represents Encounter for medical observation for suspected diseases and conditions ruled out. It is a non-billable header code requiring a more specific subcategory in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z03 billable?
No. Z03 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Z03 in?
Z03 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z03 category
Z03.6
Encounter for observation for suspected toxic effect from ingested substance ruled out
Billable
Z03.7
Encounter for suspected maternal and fetal conditions ruled out
Non-billable
Z03.8
Encounter for observation for other suspected diseases and conditions ruled out
Non-billable
Z03.71
Encounter for suspected problem with amniotic cavity and membrane ruled out
Billable
Z03.72
Encounter for suspected placental problem ruled out
Billable
Z03.73
Encounter for suspected fetal anomaly ruled out
Billable
Z03.74
Encounter for suspected problem with fetal growth ruled out
Billable
Z03.75
Encounter for suspected cervical shortening ruled out
Billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →