2021 ICD-10-CM Diagnosis Code P74.6

Transitory hyperammonemia of newborn

    2016 2017 2018 2019 2020 2021 Billable/Specific Code Code on Newborn Record
  • P74.6 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 P74.6 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of P74.6 - other international versions of ICD-10 P74.6 may differ.
ICD-10-CM Coding Rules
  • P74.6 should be used on the newborn record - not on the maternal record.
The following code(s) above P74.6 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 P74.6:
  • P00-P96
    2021 ICD-10-CM Range P00-P96

    Certain conditions originating in the perinatal period

    Includes
    • 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
    Note
    • 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
  • P70-P74
    2021 ICD-10-CM Range P70-P74

    Transitory endocrine and metabolic disorders specific to newborn

    Includes
    • transitory endocrine and metabolic disturbances caused by the infant's response to maternal endocrine and metabolic factors, or its adjustment to extrauterine environment
    Transitory endocrine and metabolic disorders specific to newborn
Approximate Synonyms
  • Neonatal transient hyperammonemia
  • Transient hyperammonemia in infancy
ICD-10-CM P74.6 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 794 Neonate with other significant problems

Convert P74.6 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
Code annotations containing back-references to P74.6:
  • Type 1 Excludes: E72.20
    ICD-10-CM Diagnosis Code E72.20

    Disorder of urea cycle metabolism, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Hyperammonemia
    Type 1 Excludes
    • hyperammonemia-hyperornithinemia-homocitrullinemia syndrome E72.4
    • transient hyperammonemia of newborn (P74.6)

Diagnosis Index entries containing back-references to P74.6:

ICD-10-CM Codes Adjacent To P74.6
P74.3 Disturbances of potassium balance of newborn
P74.31 Hyperkalemia of newborn
P74.32 Hypokalemia of newborn
P74.4 Other transitory electrolyte disturbances of newborn
P74.41 Alkalosis of newborn
P74.42 Disturbances of chlorine balance of newborn
P74.421 Hyperchloremia of newborn
P74.422 Hypochloremia of newborn
P74.49 Other transitory electrolyte disturbance of newborn
P74.5 Transitory tyrosinemia of newborn
P74.6 Transitory hyperammonemia of newborn
P74.8 Other transitory metabolic disturbances of newborn
P74.9 Transitory metabolic disturbance of newborn, unspecified
P76 Other intestinal obstruction of newborn
P76.0 Meconium plug syndrome
P76.1 Transitory ileus of newborn
P76.2 Intestinal obstruction due to inspissated milk
P76.8 Other specified intestinal obstruction of newborn
P76.9 Intestinal obstruction of newborn, unspecified
P77 Necrotizing enterocolitis of newborn
P77.1 Stage 1 necrotizing enterocolitis in newborn

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