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ICD-10-CM Codes
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R00-R99
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
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R90-R94
Abnormal findings on diagnostic imaging and in function studies, without diagnosis
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R91-
Abnormal findings on diagnostic imaging of lung
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2021 ICD-10-CM Diagnosis Code R91.1
2021 ICD-10-CM Diagnosis Code R91.1
Solitary pulmonary nodule
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- R91.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2021 edition of ICD-10-CM R91.1 became effective on October 1, 2020.
- This is the American ICD-10-CM version of R91.1 - other international versions of ICD-10 R91.1 may differ.
Applicable To- Coin lesion lung
- Solitary pulmonary nodule, subsegmental branch of the bronchial tree
The following code(s) above
R91.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
R91.1:
Approximate Synonyms
- Pulmonary nodule
- Solitary nodule of lung
Clinical Information
- A lung lesion that appears as a round coin-shaped shadow in the chest radiographs.
- A single lung lesion that is characterized by a small round mass of tissue, usually less than 1 cm in diameter, and can be detected by chest radiography. A solitary pulmonary nodule can be associated with neoplasm, tuberculosis, cyst, or other anomalies in the lung, the chest wall, or the pleura.
ICD-10-CM R91.1 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
- 205 Other respiratory system diagnoses with mcc
- 206 Other respiratory system diagnoses without mcc
Convert R91.1 to ICD-9-CM
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- Lesion(s) (nontraumatic)
- coin, lung R91.1
- lung R91.1 (coin)
- Nodule(s)
- lung, solitary (subsegmental branch of the bronchial tree) R91.1
- solitary, lung (subsegmental branch of the bronchial tree) R91.1
- pulmonary, solitary R91.1 (subsegmental branch of the bronchial tree)
ICD-10-CM Codes Adjacent To R91.1
R89.7 Abnormal histological findings in specimens from other organs, systems and tissues
R89.8 Other abnormal findings in specimens from other organs, systems and tissues
R89.9 Unspecified abnormal finding in specimens from other organs, systems and tissues
R90 Abnormal findings on diagnostic imaging of central nervous system
R90.0 Intracranial space-occupying lesion found on diagnostic imaging of central nervous system
R90.8 Other abnormal findings on diagnostic imaging of central nervous system
R90.81 Abnormal echoencephalogram
R90.82 White matter disease, unspecified
R90.89 Other abnormal findings on diagnostic imaging of central nervous system
R91 Abnormal findings on diagnostic imaging of lung
R91.1
Solitary pulmonary nodule
R91.8 Other nonspecific abnormal finding of lung field
R92 Abnormal and inconclusive findings on diagnostic imaging of breast
R92.0 Mammographic microcalcification found on diagnostic imaging of breast
R92.1 Mammographic calcification found on diagnostic imaging of breast
R92.2 Inconclusive mammogram
R92.8 Other abnormal and inconclusive findings on diagnostic imaging of breast
R93 Abnormal findings on diagnostic imaging of other body structures
R93.0 Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified
R93.1 Abnormal findings on diagnostic imaging of heart and coronary circulation
R93.2 Abnormal findings on diagnostic imaging of liver and biliary tract
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.