ICD-10 R91.8
Billable / SpecificOther nonspecific abnormal finding of lung field
About ICD-10-CM R91.8
ICD-10-CM code R91.8 represents Other nonspecific abnormal finding of lung field. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R91). The 2026 edition of ICD-10-CM R91.8 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under R91.8. Per CMS ICD-10-CM Tabular 2026.
- Lung mass NOS found on diagnostic imaging of lung
- Pulmonary infiltrate NOS
- Shadow, lung
Medicare LCD Coverage for R91.8
Local Coverage Determinations (LCDs) from CMS MACs that list R91.8 as a covered diagnosis.
Showing top 10 of 94 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R91.8.
1 Cigna
5 Medicare
3 Aetna
CPT Codes Commonly Billed with R91.8
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 71046 Chest X-ray 2 views — cough, dyspnea, wheezing, chest pain, pneumonia, COPD exacerbation, asthma exacerbation, respiratory failure, lung nodule, pneumothorax, heart failure, hx pneumonia, TB, hypoxemia Radiology
- 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
- 0080U CMS LCD: Billing and Coding: BDX-XL2 CMS LCD
Convert R91.8 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 |
|---|---|---|
| R91.8 | 79319 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R91.8
Other codes in section R90-R94 (Abnormal findings on diagnostic imaging and in function studies, without diagnosis).
ICD-10 R91.8, Billing FAQ
Is ICD-10 code R91.8 billable? +
Yes, R91.8 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 R91.8? +
ICD-10 R91.8 includes: Lung mass NOS found on diagnostic imaging of lung; Pulmonary infiltrate NOS; Shadow, lung.
What CPT codes are commonly billed with R91.8? +
Procedures frequently paired with R91.8 include: 71046, 71250, 0080U.
What ICD-9 codes does R91.8 map to? +
Per CMS GEMs, R91.8 maps to ICD-9 codes: 79319. Useful for legacy data review and historical claim analysis.
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team