ICD-10-CM Code R91.1
Solitary pulmonary nodule
Diagnosis information
Billable
Yes
Valid for claim submission
Chapter
R00–R99
Symptoms, signs and abnormal clinical findings
Risk adjustment
None
Not risk-adjustable (V28)
Procedures commonly billed with R91.1
CPT/HCPCS procedures frequently paired with R91.1 on claims. The diagnosis helps support medical necessity for the service, but documentation, the service performed, and payer/CMS policy all apply — link each line item to the diagnosis that best documents why it was needed.
More codes in the R91 category
Other billable ICD-10-CM codes in the same category as R91.1. Coding to the highest specificity the documentation supports is what keeps a claim clean — pick the child code that most precisely matches the diagnosis.
- R91.8Other nonspecific abnormal finding of lung field
Documentation & coding notes
- R91.1 is a billable/specific ICD-10-CM code — it can be reported as a primary or secondary diagnosis when the documentation supports it. Code to the highest level of specificity the record allows.
- R91.1 is a symptom/sign code. Under the ICD-10-CM Official Guidelines, a symptom that is integral to a confirmed condition is not coded separately — report R91.1 when no definitive diagnosis is established, or alongside a confirmed diagnosis only when the symptom is not routinely associated with it.
- Always verify the code against the current ICD-10-CM Official Guidelines and the payer's coverage policy before submitting — coverage, medical necessity edits, and sequencing rules vary by payer.
Related R00–R99 codes
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Medical coding disclaimer
ICD-10-CM codes and descriptions shown are from the CMS FY2026 official code set and HCC mappings from the CMS-HCC V28 model (payment year 2026), shown for educational reference. Official Guidelines, payer coverage, medical-necessity edits, and sequencing rules vary. Always verify with the current ICD-10-CM Official Guidelines and the payer before submitting claims. D3rx is not responsible for coding or billing outcomes.