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  6. 2026 ICD-10-CM Code R94

2026 ICD-10-CM Diagnosis Code R94

Abnormal results of function studies

ICD-10-CM Code:
R94
ICD-10 Code for:
Abnormal results of function studies
Is Billable?
Not Valid for Submission
Code Navigator:

R94 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of abnormal results of function studies. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

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.

Specific Coding Applicable to Abnormal results of function studies

Non-specific codes like R94 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for abnormal results of function studies:

  • R94.0 for Abnormal results of function studies of central nervous system

  • Use R94.01 for Abnormal electroencephalogram [EEG]

  • Use R94.02 for Abnormal brain scan

  • Use R94.09 for Abnormal results of other function studies of central nervous system

  • R94.1 for Abnormal results of function studies of peripheral nervous system and special senses

  • R94.11 for Abnormal results of function studies of eye

  • R94.12 for Abnormal results of function studies of ear and other special senses

  • R94.13 for Abnormal results of function studies of peripheral nervous system

  • Use R94.2 for Abnormal results of pulmonary function studies

  • R94.3 for Abnormal results of cardiovascular function studies

  • Use R94.30 for Abnormal result of cardiovascular function study, unspecified

  • Use R94.31 for Abnormal electrocardiogram [ECG] [EKG]

  • Use R94.39 for Abnormal result of other cardiovascular function study

  • Use R94.4 for Abnormal results of kidney function studies

  • Use R94.5 for Abnormal results of liver function studies

  • Use R94.6 for Abnormal results of thyroid function studies

  • Use R94.7 for Abnormal results of other endocrine function studies

  • Use R94.8 for Abnormal results of function studies of other organs and systems

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 results of function studies
        R94

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Includes

Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • abnormal results of radionuclide radioisotope uptake studies
  • abnormal results of scintigraphy

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.