Ill-defined and unknown cause of mortality 2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
R99 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM R99 became effective on October 1, 2022.
This is the American ICD-10-CM version of R99 - other international versions of ICD-10 R99 may differ.
Death (unexplained) NOS
Unspecified cause of mortality
The following code(s) above R99 contain annotation back-references that may be applicable to R99: R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified Approximate Synonyms
Death in less than 24 hours from onset of symptoms
Death less than 24 hr from onset of symptoms
Sudden infant death syndrome