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R91.8

R91.8: Other nonspecific abnormal finding of lung field

Billable / specific codeICD-10-CM

R91.8 is a billable, specific ICD-10-CM code for other nonspecific abnormal finding of lung field. It is valid for submission on a claim.

Check R91.8 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

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

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

R91.8 is named in 11 Medicare coverage policies: 11 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
  • A56612Billing and Coding: CT of the Head
  • A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
  • A56929Billing and Coding: BDX-XL2

Alphabetic index entries that lead here

  • Shadow, lung
  • Infiltrate, infiltration›lung
  • Infiltrate, infiltration›on chest x-ray
  • Infiltrate, infiltration›pulmonary
  • Mass›lung
  • Abnormal, abnormality, abnormalities›diagnostic imaging›lung(field)
  • Nodule, nodular›lung, solitary›multiple
  • Nodule, nodular›solitary, lung›multiple

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under R91

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.