What does ICD-10-CM code R91.1 mean?
R91.1 represents Solitary pulmonary nodule. As a symptom code from Chapter 18 (Symptoms, Signs and Abnormal Clinical Findings), this code should be used when no definitive diagnosis has been established for the underlying condition. Coders frequently reference this code as pulmonary nodule icd 10, icd 10 code for pulmonary nodule, icd 10 pulmonary nodule, or solitary pulmonary nodule icd 10.
Code category and hierarchy
- Chapter: 18 – Symptoms, Signs and Abnormal Clinical Findings (R00-R99)
- Category: R91
- Code: R91.1 – Solitary pulmonary nodule
Guideline notes and coding considerations
Important Guideline Note
Assign R91.1 only when documentation clearly supports this diagnosis. Review the excludes notes and ensure no conflicts with other assigned codes.
- Specificity: Assign R91.1 only when documentation supports this specific diagnosis.
Learn the underlying rules in the ICD-10 Coding Guidelines, Symptom Code Guidelines.
Documentation tips (what coders should confirm)
- Verify the clinical documentation supports the use of R91.1
Validate R91.1 Against ICD 10 CM Coding Guidelines
Check this code against official guidelines for conflicts and compliance issues.
Related ICD-10 codes
Frequently Asked Questions
The ICD-10-CM code for pulmonary nodule is R91.1, which represents solitary pulmonary nodule. This code is also commonly referenced as icd 10 code for pulmonary nodule, icd 10 pulmonary nodule, solitary pulmonary nodule icd 10. Verify this code using the ICD Code Auditor to ensure guideline compliance.
Yes. R91.1 is an active ICD-10-CM diagnosis code used to classify solitary pulmonary nodule for clinical documentation, reporting, and medical billing purposes.
Use the ICD Code Auditor to check R91.1 against official ICD-10-CM coding guidelines. The tool validates by fiscal year and patient gender to identify potential conflicts.
Yes, R91.1 can be the primary diagnosis in outpatient settings when no definitive diagnosis has been established. However, in inpatient settings, symptom codes should not be the principal diagnosis if the underlying condition has been identified. Per ICD-10-CM guidelines Section IV.D, codes for symptoms are acceptable as principal diagnosis when a definitive condition has not been established.
Documentation should clearly describe the clinical condition represented by R91.1 (Solitary pulmonary nodule). Include relevant clinical findings, diagnostic test results, provider assessment, and the treatment plan. The diagnosis must be supported by the medical record and not based solely on lab results without clinical interpretation.
Sources
Reviewed by: Certified ICD-10 Coding & Risk Adjustment Specialist
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