2020 ICD-10-CM Diagnosis Code P81.9

Disturbance of temperature regulation of newborn, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code Code on Newborn Record
  • P81.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Disturbance of temperature regulation of newborn, unsp
  • The 2020 edition of ICD-10-CM P81.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of P81.9 - other international versions of ICD-10 P81.9 may differ.
ICD-10-CM Coding Rules
  • P81.9 should be used on the newborn record - not on the maternal record.
Applicable To
  • Fever of newborn NOS
The following code(s) above P81.9 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 P81.9:
  • P00-P96
    2020 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
Approximate Synonyms
  • Disturbance of temperature regulation of newborn
  • Hyperthermia in newborn
  • Neonatal hyperthermia
  • Neonatal temperature regulation disorder
ICD-10-CM P81.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 794 Neonate with other significant problems

Convert P81.9 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
Code annotations containing back-references to P81.9:
  • Type 1 Excludes: R50
    ICD-10-CM Diagnosis Code R50

    Fever of other and unknown origin

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • chills without fever (R68.83)
    • febrile convulsions (R56.0-)
    • fever of unknown origin during labor (O75.2)
    • fever of unknown origin in newborn (P81.9)
    • hypothermia due to illness (R68.0)
    • malignant hyperthermia due to anesthesia (T88.3)
    • puerperal pyrexia NOS (O86.4)

Diagnosis Index entries containing back-references to P81.9:
  • Disorder (of) - see also Disease
  • Disturbance(s) - see also Disease
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
    ICD-10-CM Diagnosis Code R50.9

    Fever, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS
  • Hyperthermia (of unknown origin) - see also Hyperpyrexia
  • Newborn (infant) (liveborn) (singleton) Z38.2
    ICD-10-CM Diagnosis Code Z38.2

    Single liveborn infant, unspecified as to place of birth

      2016 2017 2018 2019 2020 Billable/Specific Code Newborn/Neonate Dx (0 years) POA Exempt
    Applicable To
    • Single liveborn infant NOS
  • Pyrexia (of unknown origin) R50.9
    ICD-10-CM Diagnosis Code R50.9

    Fever, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS

ICD-10-CM Codes Adjacent To P81.9
P78.84 Gestational alloimmune liver disease
P78.89 Other specified perinatal digestive system disorders
P78.9 Perinatal digestive system disorder, unspecified
P80 Hypothermia of newborn
P80.0 Cold injury syndrome
P80.8 Other hypothermia of newborn
P80.9 Hypothermia of newborn, unspecified
P81 Other disturbances of temperature regulation of newborn
P81.0 Environmental hyperthermia of newborn
P81.8 Other specified disturbances of temperature regulation of newborn
P81.9 Disturbance of temperature regulation of newborn, unspecified
P83 Other conditions of integument specific to newborn
P83.0 Sclerema neonatorum
P83.1 Neonatal erythema toxicum
P83.2 Hydrops fetalis not due to hemolytic disease
P83.3 Other and unspecified edema specific to newborn
P83.30 Unspecified edema specific to newborn
P83.39 Other edema specific to newborn
P83.4 Breast engorgement of newborn
P83.5 Congenital hydrocele
P83.6 Umbilical polyp of newborn

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