ICD-10 R91.1
Billable / SpecificSolitary pulmonary nodule
About ICD-10-CM R91.1
ICD-10-CM code R91.1 represents Solitary pulmonary nodule. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R91). The 2026 edition of ICD-10-CM R91.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under R91.1. Per CMS ICD-10-CM Tabular 2026.
- Coin lesion lung
- Solitary pulmonary nodule, subsegmental branch of the bronchial tree
Medicare LCD Coverage for R91.1
Local Coverage Determinations (LCDs) from CMS MACs that list R91.1 as a covered diagnosis.
Showing top 10 of 58 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R91.1.
1 Cigna
5 Medicare
3 Aetna
CPT Codes Commonly Billed with R91.1
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 71250 CT chest without contrast — pulmonary nodule, lung mass, lung cancer, pulmonary mets, chronic cough, dyspnea, pneumothorax, PE, lung disease, hx lung cancer, bronchial neoplasm Radiology
- 71260 CT chest with contrast — pulmonary embolism, chest pain, dyspnea, wheezing, pulmonary HTN, lung cancer, nodule, thrombophilia Radiology
- 31622 Diagnostic bronchoscopy — pulmonary nodule, lung cancer, hemoptysis, lung disease, chronic cough, pneumonia, lung mets, abnormal sputum cytology Pulmonology
- 0080U CMS LCD: Billing and Coding: BDX-XL2 CMS LCD
Convert R91.1 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| R91.1 | 79311 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R91.1
Other codes in section R90-R94 (Abnormal findings on diagnostic imaging and in function studies, without diagnosis).
ICD-10 R91.1, Billing FAQ
Is ICD-10 code R91.1 billable? +
Yes, R91.1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to R91.1? +
ICD-10 R91.1 includes: Coin lesion lung; Solitary pulmonary nodule, subsegmental branch of the bronchial tree.
What CPT codes are commonly billed with R91.1? +
Procedures frequently paired with R91.1 include: 71250, 71260, 31622, 0080U.
What ICD-9 codes does R91.1 map to? +
Per CMS GEMs, R91.1 maps to ICD-9 codes: 79311. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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