2023

  1. ICD-10-CM Codes
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  2. Z00-Z99
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  3. Z00-Z13
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  4. Z04-
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  5. 2023 ICD-10-CM Diagnosis Code Z04.9

2023 ICD-10-CM Diagnosis Code Z04.9

Encounter for examination and observation for unspecified reason

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Z04.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Encounter for examination and observation for unsp reason
  • The 2023 edition of ICD-10-CM Z04.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of Z04.9 - other international versions of ICD-10 Z04.9 may differ.
Applicable To
  • Encounter for observation NOS
The following code(s) above Z04.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Z04.9:
  • Z00-Z99
    2023 ICD-10-CM Range Z00-Z99

    Factors influencing health status and contact with health services

    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.
    Factors influencing health status and contact with health services
  • Z00-Z13
    2023 ICD-10-CM Range Z00-Z13

    Persons encountering health services for examinations

    Note
    • Nonspecific abnormal findings disclosed at the time of these examinations are classified to categories R70-R94.
    Type 1 Excludes
    • examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)
    Persons encountering health services for examinations
  • Z04
    ICD-10-CM Diagnosis Code Z04

    Encounter for examination and observation for other reasons

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Includes
    • encounter for examination for medicolegal reasons
    • This category is to be used when a person without a diagnosis is suspected of having an abnormal condition, without signs or symptoms, which requires study, but after examination and observation, is ruled-out. This category is also for use for administrative and legal observation status.
    Encounter for examination and observation for other reasons
ICD-10-CM Z04.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 951 Other factors influencing health status

Convert Z04.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to Z04.9:

ICD-10-CM Codes Adjacent To Z04.9
Z04.41 Encounter for examination and observation following alleged adult rape
Z04.42 Encounter for examination and observation following alleged child rape
Z04.6 Encounter for general psychiatric examination, requested by authority
Z04.7 Encounter for examination and observation following alleged physical abuse
Z04.71 Encounter for examination and observation following alleged adult physical abuse
Z04.72 Encounter for examination and observation following alleged child physical abuse
Z04.8 Encounter for examination and observation for other specified reasons
Z04.81 Encounter for examination and observation of victim following forced sexual exploitation
Z04.82 Encounter for examination and observation of victim following forced labor exploitation
Z04.89 Encounter for examination and observation for other specified reasons
Z04.9 Encounter for examination and observation for unspecified reason
Z05 Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out
Z05.0 Observation and evaluation of newborn for suspected cardiac condition ruled out
Z05.1 Observation and evaluation of newborn for suspected infectious condition ruled out
Z05.2 Observation and evaluation of newborn for suspected neurological condition ruled out
Z05.3 Observation and evaluation of newborn for suspected respiratory condition ruled out
Z05.4 Observation and evaluation of newborn for suspected genetic, metabolic or immunologic condition ruled out
Z05.41 Observation and evaluation of newborn for suspected genetic condition ruled out
Z05.42 Observation and evaluation of newborn for suspected metabolic condition ruled out
Z05.43 Observation and evaluation of newborn for suspected immunologic condition ruled out
Z05.5 Observation and evaluation of newborn for suspected gastrointestinal condition ruled out

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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