2027 ICD-10-CM Diagnosis Code I78.1Nevus, non-neoplastic

ICD-10-CM Codes›I00–I99›I70-I79›I78

ICD-10-CM I78.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I78.1 is a billable ICD-10-CM diagnosis code for nevus, non-neoplastic. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified circulatory disease.

Code Identity

ICD-10-CM Code
I78.1
Billable Status
Yes — Valid for Submission
Code Describes
Nevus, non-neoplastic
Short Description
Nevus, non-neoplastic
Same as the full description in the CMS dataset.
Parent Code
I78
Diseases of capillaries

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI78Diseases of capillaries
This CodeI78.1Nevus, non-neoplastic

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired telangiectasia of small and large intestines
  • Ankle flare
  • Bilateral spider veins of lower limbs
  • Capillary hemangioma
  • Compound nevus of skin
  • Corticosteroid-induced telangiectasia
  • Cutaneous complication of systemic sclerosis
  • Dermal cellular nevus
  • Diffuse telangiectasia
  • Drug-induced telangiectasia
  • Epidermal nevus
  • Generalized essential telangiectasia
  • Livedo telangiectatica
  • Lupus erythematosus-associated nailfold telangiectasia
  • Non-neoplastic nevus
  • Photodistributed telangiectasia
  • Primary idiopathic cutaneous telangiectasia
  • Progressive ascending arborizing telangiectasia
  • Scleroderma-associated nailfold telangiectasia
  • Scleroderma-associated telangiectasia
  • Secondary telangiectasia
  • Senile angioma
  • Senile nevus
  • Solar telangiectasia
  • Spider nevus
  • Spider telangiectasis in association with liver disease
  • Spider telangiectasis in association with pregnancy
  • Spider telangiectasis of skin
  • Spider telangiectasis, secondary
  • Spider vein of left lower limb
  • Spider vein of right lower limb
  • Strawberry nevus of skin
  • Telangiectasia disorder
  • Telangiectasia due to prolonged vasodilatation
  • Telangiectasia due to venous hypertension
  • Telangiectasia following surgery
  • Telangiectasia of ear
  • Telangiectasia of gastrointestinal tract
  • Telangiectasia of limb
  • Telangiectasia of lip
  • Telangiectasia of mucosa
  • Telangiectasia of nail bed
  • Telangiectasia of nailfolds
  • Telangiectasia of nasal mucosa
  • Telangiectasia of oral cavity
  • Telangiectasia of oral mucosa
  • Telangiectasia of palate
  • Telangiectasia of skin
  • Telangiectasia of skin of face
  • Telangiectasia of skin of palm of hand
  • Telangiectasia of skin of sole of foot
  • Telangiectasia of tongue
  • Telangiectasia of urinary bladder
  • Telangiectasias of lid margin
  • Telangiectasis of vocal cord following radiotherapy
  • Telangiectasis of vocal fold
  • TEMPI syndrome
  • Unilateral nevoid telangiectasia
  • Vascular disorder of large intestine
  • Venous telangiectases of the lower limb

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I78.1: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Araneus nevus
  • Senile nevus
  • Spider nevus
  • Stellar nevus

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On I78.1 itself
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I78.1, its category, or a range that includes it.

Excludes2 3

These codes carry an Excludes2 note naming I78.1: its condition is not part of those codes, and both may be reported when the patient has both.

  • Q82.5 Congenital non-neoplastic nevus
    araneus nevus (I78.1)
  • Q82.5 Congenital non-neoplastic nevus
    spider nevus (I78.1)
  • Q82.5 Congenital non-neoplastic nevus
    stellar nevus (I78.1)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR032
Other specified and unspecified circulatory disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Nevus

    a circumscribed stable malformation of the skin and occasionally of the oral mucosa, which is not due to external causes and therefore presumed to be of hereditary origin.

Patient EducationClinical

Birthmarks

Birthmarks are abnormalities of the skin that are present when a baby is born. There are two types of birthmarks. Vascular birthmarks are made up of blood vessels that haven't formed correctly. They are usually red. Two types of vascular birthmarks are hemangiomas and port-wine stains.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I78.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
448.1 Nevus, non-neoplastic
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I78.1Overview

What is the ICD-10 code for nevus, non-neoplastic?

The ICD-10-CM code for nevus, non-neoplastic is I78.1 (sometimes written as I781). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I78.1 (Diseases of capillaries) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nevus, non-neoplastic on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I78.1 group to?

When nevus, non-neoplastic is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.

Can I78.1 be reported with a code from D22?

Not as a rule. The Excludes1 note on I78.1 lists "nevus NOS (D22.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of I78.1?

Under the General Equivalence Mappings, nevus, non-neoplastic converts to ICD-9-CM 448.1 (nevus, non-neoplastic). The mapping is a direct match.