R91 ICD-10-CM Code: Abnormal findings on diagnostic imaging of lung
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
R91Abnormal findings on diagnostic imaging of lung
ICD-10-CM diagnosis code · United States clinical modification
Where R91 sits
- 1
Chapter 18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- 2
Section
Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
- 3
Category R91
Abnormal findings on diagnostic imaging of lung
- 4
Code R91
Abnormal findings on diagnostic imaging of lung
Codes under R91
R91 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for R91.
Code first
No “code first” instruction is listed for R91.
Use additional code
No “use additional code” instruction is listed for R91.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for R91.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for R91.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code R91 mean?
R91 is the FY 2027 U.S. ICD-10-CM code for “Abnormal findings on diagnostic imaging of lung.”
Is R91 a billable or specific ICD-10-CM code?
No. R91 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is R91 located in ICD-10-CM?
R91 is listed in Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), within Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94) (R90–R94), under category R91, Abnormal findings on diagnostic imaging of lung.
What coding notes are listed for R91?
No inclusion terms are listed for R91 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.