I78.1 ICD-10-CM Code: Nevus, non-neoplastic
I78.1 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Diseases of arteries, arterioles and capillaries (I70-I79)
I78.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceNevus, non-neoplastic
A benign birthmark or skin lesion caused by abnormal blood vessels, such as a port-wine stain or strawberry mark.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Araneus nevus
- Senile nevus
- Spider nevus
- Stellar nevus
Excludes 2
Official- blue nevus (D22.-)
- flammeus nevus (Q82.5)
- hairy nevus (D22.-)
- melanocytic nevus (D22.-)
- pigmented nevus (D22.-)
- portwine nevus (Q82.5)
- sanguineous nevus (Q82.5)
- strawberry nevus (Q82.5)
- verrucous nevus (Q82.5)
- certain conditions originating in the perinatal period (P04-P96)Inherited from I00-I99
- certain infectious and parasitic diseases (A00-B99)Inherited from I00-I99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from I00-I99
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from I00-I99
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from I00-I99
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from I00-I99
- neoplasms (C00-D49)Inherited from I00-I99
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from I00-I99
- systemic connective tissue disorders (M30-M36)Inherited from I00-I99
- transient cerebral ischemic attacks and related syndromes (G45.-)Inherited from I00-I99
Related Codes
Includes
OfficialNo Includes notes are included in this display for I78.1. Check the code and parent instructions in the Code Book.
Excludes 1
Official- nevus NOS (D22.-)
- vascular NOS (Q82.5)
Code First
OfficialNo Code First sequencing instructions are included in this display for I78.1. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for I78.1. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for I78.1. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is I78.1 an HCC code?
No. I78.1 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- I78.1
- Description
- Nevus, non-neoplastic
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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What This Code Means
I78.1 is the ICD-10-CM diagnosis code for nevus, non-neoplastic. A benign birthmark or skin lesion caused by abnormal blood vessels, such as a port-wine stain or strawberry mark. I78.1 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering diseases of arteries, arterioles and capillaries (i70-i79).
I78.1 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Specify the location of the nevus on the body when documented.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for I78.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Specify the location of the nevus on the body when documented
- •Distinguish from neoplastic nevi; this code is specifically for non-cancerous vascular lesions