R91.8 Other nonspecific abnormal finding of lung field

Billable ICD-10-CM code, FY2026.

Applicable to

• Lung mass NOS found on diagnostic imaging of lung
• Pulmonary infiltrate NOS
• Shadow, lung

MS-DRG index

Defines the logic of DRG(s) 204 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 793.19 Other nonspecific abnormal finding of lung field

Code annotations containing back-references to R91.8

Back-references to R91.8

• Type 2 Excludes: J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary infiltrate NOS (R91.8)")

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 R91.8

• Abnormal, abnormality, abnormalities › diagnostic imaging › lung (field)
• Infiltrate, infiltration › lung
• Infiltrate, infiltration › on chest x-ray
• Infiltrate, infiltration › pulmonary
• Mass › lung
• Nodule (s), nodular › lung, solitary (subsegmental branch of the bronchial tree) › multiple
• Nodule (s), nodular › solitary, lung (subsegmental branch of the bronchial tree) › multiple
• Shadow, lung

Nearby codes

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