2020 ICD-10-CM Diagnosis Code P08.21

Post-term newborn

    2016 2017 2018 2019 2020 Billable/Specific Code Code on Newborn Record
  • P08.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM P08.21 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of P08.21 - other international versions of ICD-10 P08.21 may differ.
ICD-10-CM Coding Rules
  • P08.21 should be used on the newborn record - not on the maternal record.
Applicable To
  • Newborn with gestation period over 40 completed weeks to 42 completed weeks
The following code(s) above P08.21 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 P08.21:
  • 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
  • P08
    ICD-10-CM Diagnosis Code P08

    Disorders of newborn related to long gestation and high birth weight

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Includes
    • the listed conditions, without further specification, as causes of morbidity or additional care, in newborn
    Note
    • When both birth weight and gestational age of the newborn are available, priority of assignment should be given to birth weight
    Disorders of newborn related to long gestation and high birth weight
Approximate Synonyms
  • Post-term infant, not heavy-for-dates
  • Postterm infant, not heavy for dates
ICD-10-CM P08.21 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 795 Normal newborn

Convert P08.21 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

Diagnosis Index entries containing back-references to P08.21:
  • 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
    • post-term P08.21
  • Post-term (40-42 weeks) (pregnancy) (mother) O48.0
    ICD-10-CM Diagnosis Code O48.0

    Post-term pregnancy

      2016 2017 2018 2019 2020 Billable/Specific Code Maternity Dx (12-55 years)
    Applicable To
    • Pregnancy over 40 completed weeks to 42 completed weeks gestation
    • infant P08.21

ICD-10-CM Codes Adjacent To P08.21
P07.34 Preterm newborn, gestational age 31 completed weeks
P07.35 Preterm newborn, gestational age 32 completed weeks
P07.36 Preterm newborn, gestational age 33 completed weeks
P07.37 Preterm newborn, gestational age 34 completed weeks
P07.38 Preterm newborn, gestational age 35 completed weeks
P07.39 Preterm newborn, gestational age 36 completed weeks
P08 Disorders of newborn related to long gestation and high birth weight
P08.0 Exceptionally large newborn baby
P08.1 Other heavy for gestational age newborn
P08.2 Late newborn, not heavy for gestational age
P08.21 Post-term newborn
P08.22 Prolonged gestation of newborn
P09 Abnormal findings on neonatal screening
P10 Intracranial laceration and hemorrhage due to birth injury
P10.0 Subdural hemorrhage due to birth injury
P10.1 Cerebral hemorrhage due to birth injury
P10.2 Intraventricular hemorrhage due to birth injury
P10.3 Subarachnoid hemorrhage due to birth injury
P10.4 Tentorial tear due to birth injury
P10.8 Other intracranial lacerations and hemorrhages due to birth injury
P10.9 Unspecified intracranial laceration and hemorrhage due to birth injury

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