Specific code icon 2016/17 ICD-10-CM Diagnosis Code R99

Ill-defined and unknown cause of mortality

    2016 2017 Billable/Specific Code

  • R99 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • This is the American ICD-10-CM version of R99. Other international versions of ICD-10 R99 may differ.
  • Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Applicable To
  • Death (unexplained) NOS
  • Unspecified cause of mortality
ICD-10-CM R99 is grouped within Diagnostic Related Group (MS-DRG v34.0):
  • 951 Other factors influencing health status

Convert ICD-10-CM R99 to ICD-9-CM

The following ICD-10-CM Index entries contain back-references to ICD-10-CM R99:
  • Cot death R99
  • Crib death R99
  • Death (cause unknown) (of) (unexplained) (unspecified cause) R99
  • Syndrome - see also Disease
  • crib death R99