2026 ICD-10-CM Diagnosis Code Z05Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out

ICD-10-CM Codes›Z00–Z99›Z00-Z13›Z05

ICD-10-CM Z05
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z05 is a non-billable ICD-10-CM category code for encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Z05.0, Z05.1, Z05.2, and Z05.3.

Code Identity

ICD-10-CM Code
Z05
Billable Status
No — Non-Billable Category
Code Describes
Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out
Chapter
Z00-Z13
Persons encountering health services for examinations

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ00-Z13Persons encountering health services for examinations
CategoryZ05Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out
This CodeZ05Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out

Specific Coding for Enctr for Obs & eval of NB for susp diseases and cond R/OOverview

Non-specific codes like Z05 require more characters. Use one of these billable codes instead:

  • Use Z05.0 for Observation and evaluation of newborn for suspected cardiac condition ruled out

  • Use Z05.1 for Observation and evaluation of newborn for suspected infectious condition ruled out

  • Use Z05.2 for Observation and evaluation of newborn for suspected neurological condition ruled out

  • Use Z05.3 for Observation and evaluation of newborn for suspected respiratory condition ruled out

  • Z05.4 for Observation and evaluation of newborn for suspected genetic, metabolic or immunologic condition ruled out

  • Use Z05.41 for Observation and evaluation of newborn for suspected genetic condition ruled out

  • Use Z05.42 for Observation and evaluation of newborn for suspected metabolic condition ruled out

  • Use Z05.43 for Observation and evaluation of newborn for suspected immunologic condition ruled out

  • Use Z05.5 for Observation and evaluation of newborn for suspected gastrointestinal condition ruled out

  • Use Z05.6 for Observation and evaluation of newborn for suspected genitourinary condition ruled out

  • Z05.7 for Observation and evaluation of newborn for suspected skin, subcutaneous, musculoskeletal and connective tissue condition ruled out

  • Use Z05.71 for Observation and evaluation of newborn for suspected skin and subcutaneous tissue condition ruled out

  • Use Z05.72 for Observation and evaluation of newborn for suspected musculoskeletal condition ruled out

  • Use Z05.73 for Observation and evaluation of newborn for suspected connective tissue condition ruled out

  • Z05.8 for Observation and evaluation of newborn for other specified suspected condition ruled out

  • Use Z05.81 for Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out

  • Use Z05.89 for Observation and evaluation of newborn for other specified suspected condition ruled out

  • Use Z05.9 for Observation and evaluation of newborn for unspecified suspected condition ruled out

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • 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.

Code HistoryHistory

FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z05Overview

Is Z05 a billable code?

No. This is a category header that groups the codes for encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out, and headers cannot be submitted on claims. Claims for encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out need a more specific code from this category, such as Z05.0, Z05.1, and Z05.2.