2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Enctr for Obs & eval of NB for susp diseases and cond R/O
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z05: its own notes plus those printed at block Z00-Z13 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • 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.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block Z00-Z13 Persons encountering health services for examinations applies to 156 codes
  • examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)

Notes

General instructions on how these codes are used.

From Block Z00-Z13 Persons encountering health services for examinations applies to 156 codes
  • Nonspecific abnormal findings disclosed at the time of these examinations are classified to categories R70-R94.
From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z05, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Z05: they are not reported together with it, unless the two conditions are unrelated.

  • Z03 Encounter for medical observation for suspected diseases and conditions ruled out
    encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out (Z05.-)

Excludes2 5

These codes carry an Excludes2 note naming Z05: its condition is not part of those codes, and both may be reported when the patient has both.

  • P00 Newborn affected by maternal conditions that may be unrelated to present pregnancy
    encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)
  • P01 Newborn affected by maternal complications of pregnancy
    encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)
  • P02 Newborn affected by complications of placenta, cord and membranes
    encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)
  • P03 Newborn affected by other complications of labor and delivery
    encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)
  • P04 Newborn affected by noxious substances transmitted via placenta or breast milk
    encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)

Code HistoryHistory

FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

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.