2021 ICD-10-CM Diagnosis Code P91.811

Neonatal encephalopathy in diseases classified elsewhere

    2018 - New Code 2019 2020 2021 Billable/Specific Code Code on Newborn Record POA Exempt Manifestation Code
  • P91.811 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM P91.811 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of P91.811 - other international versions of ICD-10 P91.811 may differ.
ICD-10-CM Coding Rules
  • P91.811 should be used on the newborn record - not on the maternal record.
  • P91.811 describes the manifestation of an underlying disease, not the disease itself.
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • underlying condition, if known, such as:
  • congenital cirrhosis (of liver) (
    ICD-10-CM Diagnosis Code P78.81

    Congenital cirrhosis (of liver)

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Code on Newborn Record
  • intracranial nontraumatic hemorrhage of newborn (
    ICD-10-CM Diagnosis Code P52
    • P52 Intracranial nontraumatic hemorrhage of newbo...
      • P52.0 Intraventricular (nontraumatic) hemorrhage, g...
      • P52.1 Intraventricular (nontraumatic) hemorrhage, g...
      • P52.2 Intraventricular (nontraumatic) hemorrhage, g...
        • P52.21 Intraventricular (nontraumatic) hemorrhage, g...
        • P52.22 Intraventricular (nontraumatic) hemorrhage, g...
      • P52.3 Unspecified intraventricular (nontraumatic) h...
      • P52.4 Intracerebral (nontraumatic) hemorrhage of ne...
      • P52.5 Subarachnoid (nontraumatic) hemorrhage of new...
      • P52.6 Cerebellar (nontraumatic) and posterior fossa...
      • P52.8 Other intracranial (nontraumatic) hemorrhages...
      • P52.9 Intracranial (nontraumatic) hemorrhage of new...
  • kernicterus (
    ICD-10-CM Diagnosis Code P57
    • P57 Kernicterus
      • P57.0 Kernicterus due to isoimmunization
      • P57.8 Other specified kernicterus
      • P57.9 Kernicterus, unspecified
The following code(s) above P91.811 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 P91.811:
  • P00-P96
    2021 ICD-10-CM Range P00-P96

    Certain conditions originating in the perinatal period

    • conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
    • Codes from this chapter are for use on newborn records only, never on maternal records
    Type 2 Excludes
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • tetanus neonatorum (A33)
    Certain conditions originating in the perinatal period
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • P91.811 is considered exempt from POA reporting.
ICD-10-CM P91.811 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems

Convert P91.811 to ICD-9-CM

Code History
  • 2018 (effective 10/1/2017): New code
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to P91.811:
  • Encephalopathy (acute) G93.40
    ICD-10-CM Diagnosis Code G93.40

    Encephalopathy, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • neonatal P91.819
      ICD-10-CM Diagnosis Code P91.819

      Neonatal encephalopathy, unspecified

        2018 - New Code 2019 2020 2021 Billable/Specific Code Code on Newborn Record POA Exempt
      • in diseases classified elsewhere P91.811

ICD-10-CM Codes Adjacent To P91.811
P91.3 Neonatal cerebral irritability
P91.4 Neonatal cerebral depression
P91.5 Neonatal coma
P91.6 Hypoxic ischemic encephalopathy [HIE]
P91.60 …… unspecified
P91.61 Mild hypoxic ischemic encephalopathy [HIE]
P91.62 Moderate hypoxic ischemic encephalopathy [HIE]
P91.63 Severe hypoxic ischemic encephalopathy [HIE]
P91.8 Other specified disturbances of cerebral status of newborn
P91.81 Neonatal encephalopathy
P91.811 …… in diseases classified elsewhere
P91.819 …… unspecified
P91.82 Neonatal cerebral infarction
P91.821 …… right side of brain
P91.822 …… left side of brain
P91.823 …… bilateral
P91.829 …… unspecified side
P91.88 Other specified disturbances of cerebral status of newborn
P91.9 Disturbance of cerebral status of newborn, unspecified
P92 Feeding problems of newborn
P92.0 Vomiting of newborn

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