1. 2021/2022 ICD-10-CM Index
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2. 'O' Terms
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3. Index Terms Starting With 'O' (Observation)

Index Terms Starting With 'O' (Observation)

• Observation (following) (for) (without need for further medical care) Z04.9

  ICD-10-CM Diagnosis Code Z04.9

  Encounter for examination and observation for unspecified reason

  2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code

  Applicable To

  • Encounter for observation NOS

  • accident NEC Z04.3
    ICD-10-CM Diagnosis Code Z04.3

    Encounter for examination and observation following other accident

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • at work Z04.2
      ICD-10-CM Diagnosis Code Z04.2

      Encounter for examination and observation following work accident

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • transport Z04.1
      ICD-10-CM Diagnosis Code Z04.1

      Encounter for examination and observation following transport accident

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code

      Type 1 Excludes

      • encounter for examination and observation following work accident (Z04.2)
  • adverse effect of drug Z03.6
    ICD-10-CM Diagnosis Code Z03.6

    Encounter for observation for suspected toxic effect from ingested substance ruled out

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt

    Applicable To

    • Encounter for observation for suspected adverse effect from drug
    • Encounter for observation for suspected poisoning
  • alleged rape or sexual assault (victim)
    • adult Z04.41
      ICD-10-CM Diagnosis Code Z04.41

      Encounter for examination and observation following alleged adult rape

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Adult Dx (15-124 years)

      Applicable To

      • Suspected adult rape, ruled out
      • Suspected adult sexual abuse, ruled out
    • child Z04.42
      ICD-10-CM Diagnosis Code Z04.42

      Encounter for examination and observation following alleged child rape

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)

      Applicable To

      • Suspected child rape, ruled out
      • Suspected child sexual abuse, ruled out
  • criminal assault Z04.89
    ICD-10-CM Diagnosis Code Z04.89

    Encounter for examination and observation for other specified reasons

    2019 - New Code 2020 2021 2022 Billable/Specific Code POA Exempt
  • development state
    • adolescent Z00.3
      ICD-10-CM Diagnosis Code Z00.3

      Encounter for examination for adolescent development state

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years) POA Exempt

      Applicable To

      • Encounter for puberty development state
    • period of rapid growth in childhood Z00.2
      ICD-10-CM Diagnosis Code Z00.2

      Encounter for examination for period of rapid growth in childhood

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years) POA Exempt
    • puberty Z00.3
      ICD-10-CM Diagnosis Code Z00.3

      Encounter for examination for adolescent development state

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years) POA Exempt

      Applicable To

      • Encounter for puberty development state
  • disease, specified NEC Z03.89
    ICD-10-CM Diagnosis Code Z03.89

    Encounter for observation for other suspected diseases and conditions ruled out

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
  • following work accident Z04.2
    ICD-10-CM Diagnosis Code Z04.2

    Encounter for examination and observation following work accident

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • forced labor exploitation Z04.82
    ICD-10-CM Diagnosis Code Z04.82

    Encounter for examination and observation of victim following forced labor exploitation

    2019 - New Code 2020 2021 2022 Billable/Specific Code POA Exempt
  • forced sexual exploitation Z04.81
    ICD-10-CM Diagnosis Code Z04.81

    Encounter for examination and observation of victim following forced sexual exploitation

    2019 - New Code 2020 2021 2022 Billable/Specific Code POA Exempt
  • growth and development state - see Observation, development state
  • injuries (accidental) - see also Observation, accident
  • newborn (for)
    • suspected condition, related to exposure from the mother or birth process - see - Newborn, affected by, maternal
      • ruled out Z05.9
        ICD-10-CM Diagnosis Code Z05.9

        Observation and evaluation of newborn for unspecified suspected condition ruled out

        2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • cardiac Z05.0
          ICD-10-CM Diagnosis Code Z05.0

          Observation and evaluation of newborn for suspected cardiac condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • connective tissue Z05.73
          ICD-10-CM Diagnosis Code Z05.73

          Observation and evaluation of newborn for suspected connective tissue condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • gastrointestinal Z05.5
          ICD-10-CM Diagnosis Code Z05.5

          Observation and evaluation of newborn for suspected gastrointestinal condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • genetic Z05.41
          ICD-10-CM Diagnosis Code Z05.41

          Observation and evaluation of newborn for suspected genetic condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • genitourinary Z05.6
          ICD-10-CM Diagnosis Code Z05.6

          Observation and evaluation of newborn for suspected genitourinary condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • immunologic Z05.43
          ICD-10-CM Diagnosis Code Z05.43

          Observation and evaluation of newborn for suspected immunologic condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • infectious Z05.1
          ICD-10-CM Diagnosis Code Z05.1

          Observation and evaluation of newborn for suspected infectious condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • metabolic Z05.42
          ICD-10-CM Diagnosis Code Z05.42

          Observation and evaluation of newborn for suspected metabolic condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • musculoskeletal Z05.72
          ICD-10-CM Diagnosis Code Z05.72

          Observation and evaluation of newborn for suspected musculoskeletal condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • neurological Z05.2
          ICD-10-CM Diagnosis Code Z05.2

          Observation and evaluation of newborn for suspected neurological condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • respiratory Z05.3
          ICD-10-CM Diagnosis Code Z05.3

          Observation and evaluation of newborn for suspected respiratory condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • skin and subcutaneous tissue Z05.71
          ICD-10-CM Diagnosis Code Z05.71

          Observation and evaluation of newborn for suspected skin and subcutaneous tissue condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
        • specified condition NEC Z05.8
          ICD-10-CM Diagnosis Code Z05.8

          Observation and evaluation of newborn for other specified suspected condition ruled out

          2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
  • postpartum
    • immediately after delivery Z39.0
      ICD-10-CM Diagnosis Code Z39.0

      Encounter for care and examination of mother immediately after delivery

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Maternity Dx (12-55 years) POA Exempt

      Applicable To

      • Care and observation in uncomplicated cases when the delivery occurs outside a healthcare facility

      Type 1 Excludes

      • care for postpartum complication- see Alphabetic index
    • routine follow-up Z39.2
      ICD-10-CM Diagnosis Code Z39.2

      Encounter for routine postpartum follow-up

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Maternity Dx (12-55 years) POA Exempt
  • pregnancy (normal) (without complication) Z34.9-
    ICD-10-CM Diagnosis Code Z34.9-

    Encounter for supervision of normal pregnancy, unspecified

    2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    • high risk O09.9-
      ICD-10-CM Diagnosis Code O09.9-

      Supervision of high risk pregnancy, unspecified

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
  • suicide attempt, alleged NEC Z03.89
    ICD-10-CM Diagnosis Code Z03.89

    Encounter for observation for other suspected diseases and conditions ruled out

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
    • self-poisoning Z03.6
      ICD-10-CM Diagnosis Code Z03.6

      Encounter for observation for suspected toxic effect from ingested substance ruled out

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt

      Applicable To

      • Encounter for observation for suspected adverse effect from drug
      • Encounter for observation for suspected poisoning
  • suspected, ruled out - see also Suspected condition, ruled out
    • abuse, physical
      • adult Z04.71
        ICD-10-CM Diagnosis Code Z04.71

        Encounter for examination and observation following alleged adult physical abuse

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Adult Dx (15-124 years)

        Applicable To

        • Suspected adult physical abuse, ruled out

        Type 1 Excludes

        • confirmed case of adult physical abuse (T74.-)
        • encounter for examination and observation following alleged adult sexual abuse (Z04.41)
        • suspected case of adult physical abuse, not ruled out (T76.-)
      • child Z04.72
        ICD-10-CM Diagnosis Code Z04.72

        Encounter for examination and observation following alleged child physical abuse

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)

        Applicable To

        • Suspected child physical abuse, ruled out

        Type 1 Excludes

        • confirmed case of child physical abuse (T74.-)
        • encounter for examination and observation following alleged child sexual abuse (Z04.42)
        • suspected case of child physical abuse, not ruled out (T76.-)
    • accident at work Z04.2
      ICD-10-CM Diagnosis Code Z04.2

      Encounter for examination and observation following work accident

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • adult battering victim Z04.71
      ICD-10-CM Diagnosis Code Z04.71

      Encounter for examination and observation following alleged adult physical abuse

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Adult Dx (15-124 years)

      Applicable To

      • Suspected adult physical abuse, ruled out

      Type 1 Excludes

      • confirmed case of adult physical abuse (T74.-)
      • encounter for examination and observation following alleged adult sexual abuse (Z04.41)
      • suspected case of adult physical abuse, not ruled out (T76.-)
    • child battering victim Z04.72
      ICD-10-CM Diagnosis Code Z04.72

      Encounter for examination and observation following alleged child physical abuse

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)

      Applicable To

      • Suspected child physical abuse, ruled out

      Type 1 Excludes

      • confirmed case of child physical abuse (T74.-)
      • encounter for examination and observation following alleged child sexual abuse (Z04.42)
      • suspected case of child physical abuse, not ruled out (T76.-)
    • condition NEC Z03.89
      ICD-10-CM Diagnosis Code Z03.89

      Encounter for observation for other suspected diseases and conditions ruled out

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
      • newborn Z05.9
        - see also Observation, newborn (for), suspected condition, ruled out
        ICD-10-CM Diagnosis Code Z05.9

        Observation and evaluation of newborn for unspecified suspected condition ruled out

        2017 - New Code 2018 2019 2020 2021 2022 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
    • drug poisoning or adverse effect Z03.6
      ICD-10-CM Diagnosis Code Z03.6

      Encounter for observation for suspected toxic effect from ingested substance ruled out

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt

      Applicable To

      • Encounter for observation for suspected adverse effect from drug
      • Encounter for observation for suspected poisoning
    • exposure (to)
      • anthrax Z03.810
        ICD-10-CM Diagnosis Code Z03.810

        Encounter for observation for suspected exposure to anthrax ruled out

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
      • biological agent NEC Z03.818
        ICD-10-CM Diagnosis Code Z03.818

        Encounter for observation for suspected exposure to other biological agents ruled out

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
    • foreign body
      • aspirated Z03.822
        (inhaled)
        ICD-10-CM Diagnosis Code Z03.822

        Encounter for observation for suspected aspirated (inhaled) foreign body ruled out

        2021 - New Code 2022 Billable/Specific Code POA Exempt
      • ingested Z03.821
        ICD-10-CM Diagnosis Code Z03.821

        Encounter for observation for suspected ingested foreign body ruled out

        2021 - New Code 2022 Billable/Specific Code POA Exempt
      • inserted Z03.823
        (injected), in (eye) (orifice) (skin)
        ICD-10-CM Diagnosis Code Z03.823

        Encounter for observation for suspected inserted (injected) foreign body ruled out

        2021 - New Code 2022 Billable/Specific Code POA Exempt

        Applicable To

        • Encounter for observation for suspected inserted (injected) foreign body in eye ruled out
        • Encounter for observation for suspected inserted (injected) foreign body in orifice ruled out
        • Encounter for observation for suspected inserted (injected) foreign body in skin ruled out
    • inflicted injury NEC Z04.89
      ICD-10-CM Diagnosis Code Z04.89

      Encounter for examination and observation for other specified reasons

      2019 - New Code 2020 2021 2022 Billable/Specific Code POA Exempt
    • suicide attempt, alleged Z03.89
      ICD-10-CM Diagnosis Code Z03.89

      Encounter for observation for other suspected diseases and conditions ruled out

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
      • self-poisoning Z03.6
        ICD-10-CM Diagnosis Code Z03.6

        Encounter for observation for suspected toxic effect from ingested substance ruled out

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt

        Applicable To

        • Encounter for observation for suspected adverse effect from drug
        • Encounter for observation for suspected poisoning
    • toxic effects from ingested substance Z03.6
      (drug) (poison)
      ICD-10-CM Diagnosis Code Z03.6

      Encounter for observation for suspected toxic effect from ingested substance ruled out

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt

      Applicable To

      • Encounter for observation for suspected adverse effect from drug
      • Encounter for observation for suspected poisoning
  • toxic effects from ingested substance Z03.6
    (drug) (poison)
    ICD-10-CM Diagnosis Code Z03.6

    Encounter for observation for suspected toxic effect from ingested substance ruled out

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt

    Applicable To

    • Encounter for observation for suspected adverse effect from drug
    • Encounter for observation for suspected poisoning