ICD-10-CM Code R90.81

Abnormal echoencephalogram

Version 2021 Billable Code No Valid Principal Dx

Valid for Submission

R90.81 is a billable code used to specify a medical diagnosis of abnormal echoencephalogram. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code R90.81 might also be used to specify conditions or terms like echoencephalogram abnormal or imaging of brain abnormal or imaging of central nervous system abnormal or ultrasonography of brain abnormal.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Short Description:Abnormal echoencephalogram
Long Description:Abnormal echoencephalogram

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code R90.81 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Echoencephalogram abnormal
  • Imaging of brain abnormal
  • Imaging of central nervous system abnormal
  • Ultrasonography of brain abnormal

Convert R90.81 to ICD-9

  • 794.01 - Abnorm echoencephalogram

Code Classification

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
    • Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
      • Abnormal findings on diagnostic imaging of cnsl (R90)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021