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Z05

Z05Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out

Non-billable headerICD-10-CM

Z05 is a non-billable header ICD-10-CM code for encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • This category is to be used for newborns, within the neonatal period (the first 28 days of life), who are suspected of having an abnormal condition, but without signs or symptoms, and which, after examination and observation, is ruled out.

Other codes that can never be billed with Z05

These codes carry an Excludes1 note pointing at Z05. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Z05 alone.

  • Z03Encounter for medical observation for suspected diseases and conditions ruled out

Risk adjustment

Z05 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead Z05

10 child codes. Green means billable.

Questions about Z05

Is Z05 a billable ICD-10-CM code?
No. Z05 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Z05 sit in the tabular list?
Factors influencing health status and contact with health services (Z00-Z99), in the block Persons encountering health services for examinations (Z00-Z13).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.