R91.8

ICD-10Billable

Other nonspecific abnormal finding of lung field

Official ICD-10-CM descriptor (FY2026)

Other nonspecific abnormal finding of lung field

R91.8 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

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

Related codes in R91

R91.1Solitary pulmonary nodule

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
Parent code: R91

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.