ICD-10-CM R91.1 is the diagnosis code for Solitary pulmonary nodule. This code falls under the section "Abnormal findings on diagnostic imaging and in function studies, without diagnosis" within Chapter 18 — Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where R91.1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, R91.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
R91.1 is the ICD-10-CM diagnosis code for "Solitary pulmonary nodule". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of R91.1 is R91 ("Abnormal findings on diagnostic imaging of lung"). R91.1 provides a more specific classification within this category.
R91.1 is located in Section R90-R94 — "Abnormal findings on diagnostic imaging and in function studies, without diagnosis" within Chapter 18 of the ICD-10-CM Tabular List.
Use R91.1 when the patients documented diagnosis matches "Solitary pulmonary nodule" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Solitary pulmonary nodule is R91.1.
Yes, R91.1 can be used as a primary diagnosis code since it is billable and specific.
R91.1 is in Chapter 18 of the ICD-10-CM Tabular List.
Yes, R91.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.