R91.1Billable

Solitary pulmonary nodule

Chapter
18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Category
R91
Effective date
October 1, 2026

Related codes in category R91

R91Abnormal findings on diagnostic imaging of lungR91.8Other nonspecific abnormal finding of lung fieldYes

Frequently asked questions

What is ICD-10 code R91.1?

R91.1 is an ICD-10-CM diagnosis code for Solitary pulmonary nodule.

Is R91.1 a billable code?

Yes. R91.1 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is R91.1 in?

R91.1 falls under Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

When did R91.1 become effective?

R91.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to R91.1?

R91.1 belongs to category R91, which includes 2 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.