ICD-10-CM 2027
ICD-10 code for spider nevus
From the official ICD-10-CM alphabetic index entry “Nevus › spider”. Page updated September 29, 2026.
About coding spider nevus
The ICD-10-CM code for spider nevus is I78.1 (Nevus, non-neoplastic).
Within I78 (diseases of capillaries), I78.1 is specifically for nevus, non-neoplastic. Related codes cover hereditary hemorrhagic telangiectasia (I78.0), other diseases of capillaries (I78.8) and disease of capillaries, unspecified (I78.9).
Don't report I78.1 together with the conditions in its Excludes1 note: nevus NOS (D22.-) and vascular NOS (Q82.5).
The conditions in its Excludes2 note aren't part of I78.1, but may be coded alongside it if the patient has both: blue nevus (D22.-), flammeus nevus (Q82.5), hairy nevus (D22.-), melanocytic nevus (D22.-) and 5 more.
Don't confuse with (Excludes1 for I78.1)
Common questions about spider nevus ICD-10 codes
What is the ICD-10 code for spider nevus?
- I78.1 — Nevus, non-neoplastic.
Is I78.1 billable?
- Yes. I78.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I78.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I78.1 as a principal diagnosis.
Is I78.1 a CC or MCC?
- No. I78.1 is neither a CC nor an MCC under MS-DRG v44.0.