R91.1 Solitary pulmonary nodule

Billable ICD-10-CM code, FY2026.

Applicable to

• Coin lesion lung
• Solitary pulmonary nodule, subsegmental branch of the bronchial tree

MS-DRG index

Defines the logic of DRG(s) 205-206 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 793.11 Solitary pulmonary nodule

Code annotations containing back-references to R91.1

Back-references to R91

• Type 1 Excludes: R22 Localized swelling, mass and lump of skin and subcutaneous tissue ("abnormal findings on diagnostic imaging (R90-R93)")

Diagnosis Index entries for R91.1

• Lesion (s) (nontraumatic) › coin, lung
• Lesion (s) (nontraumatic) › lung (coin)
• Nodule (s), nodular › lung, solitary (subsegmental branch of the bronchial tree)
• Nodule (s), nodular › pulmonary, solitary (subsegmental branch of the bronchial tree)
• Nodule (s), nodular › solitary, lung (subsegmental branch of the bronchial tree)

Nearby codes

• R91 Abnormal findings on diagnostic imaging of lung
• R91.1 Solitary pulmonary nodule (this code)
• R91.8 Other nonspecific abnormal finding of lung field