Z05CurrentCategory · further specificity required

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

Excludes 2 · 1

Z00-Z13 · Persons encountering health services for examinations (Z00-Z13)

Excludes 2

examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)

More specific codes

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

First observed · 2016-10-01

Code history

Latest recorded change · FY2026

ChangedUnchanged

FY2026

Effective from 2025-10-01

Inherited rules changed

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

Category — select a more specific code

CDC/NCHS · FY2026

All editions (18)

All editions	Effective from	Code history
FY2017	2016-10-01	Added
FY2018	2017-10-01	Title changed · Code-level rules changed
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	Inherited rules changed
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code-level instructions

Includes

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.

Inherited instructions

Chapters 21 · Factors influencing health status and contact with health services (Z00-Z99)

Note

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.

Z00-Z13 · Persons encountering health services for examinations (Z00-Z13)

Excludes 2

examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)

Note

Nonspecific abnormal findings disclosed at the time of these examinations are classified to categories R70-R94.

More specific codes

Z05.0Observation and evaluation of newborn for suspected cardiac condition ruled outBillable / specific Z05.1Observation and evaluation of newborn for suspected infectious condition ruled outBillable / specific Z05.2Observation and evaluation of newborn for suspected neurological condition ruled outBillable / specific Z05.3Observation and evaluation of newborn for suspected respiratory condition ruled outBillable / specific Z05.4Observation and evaluation of newborn for suspected genetic, metabolic or immunologic condition ruled outCategory · further specificity required Z05.5Observation and evaluation of newborn for suspected gastrointestinal condition ruled outBillable / specific Z05.6Observation and evaluation of newborn for suspected genitourinary condition ruled outBillable / specific Z05.7Observation and evaluation of newborn for suspected skin, subcutaneous, musculoskeletal and connective tissue condition ruled outCategory · further specificity required Z05.8Observation and evaluation of newborn for other specified suspected condition ruled outCategory · further specificity required Z05.9Observation and evaluation of newborn for unspecified suspected condition ruled outBillable / specific

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗