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  6. 2025 ICD-10-CM Code R91
Version 2025
Non-Billable Code
No Valid Principal Dx

2025 ICD-10-CM Diagnosis Code R91

Abnormal findings on diagnostic imaging of lung

ICD-10-CM Code:
R91
ICD-10 Code for:
Abnormal findings on diagnostic imaging of lung
Is Billable?
Not Valid for Submission
Code Navigator:

Specific Coding Applicable to Abnormal findings on diagnostic imaging of lung

Non-specific codes like R91 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for abnormal findings on diagnostic imaging of lung:

  • Use R91.1 for Solitary pulmonary nodule - BILLABLE CODE

  • Use R91.8 for Other nonspecific abnormal finding of lung field - BILLABLE CODE

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 lung
        (R91)

R91 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of abnormal findings on diagnostic imaging of lung. The code is not specific and is NOT valid for the year 2025 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.

Code History

  • 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.