2027 ICD-10-CM Diagnosis Code I78.9Disease of capillaries, unspecified
ICD-10-CM Codes›I00–I99›I70-I79›I78
- Billable — Valid for Submission
- Chronic Condition
I78.9 is a billable ICD-10-CM diagnosis code for disease of capillaries, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301. Coders also document this condition as acroangiodermatitis of skin. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified circulatory disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acroangiodermatitis of skin
- Dilated blood vessels in skin
- Disorder of capillaries
- Reactive vascular proliferation of skin
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I78.9: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.
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.
- 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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Acroangiodermatitis I78.9
Disease, diseased See Also: Syndrome;
capillaries I78.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Capillary Disorder
a disorder of microvessels.
Patient EducationClinical
Vascular Diseases
Your vascular system is your body's network of blood vessels. It includes your:
The full article covers:
- What are vascular diseases?
- What causes vascular diseases?
- Who is at risk for vascular diseases?
- What are the symptoms of vascular diseases?
- How are vascular diseases diagnosed?
- How are vascular diseases treated?
- Can vascular diseases be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I78.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I78.9Overview
What is the ICD-10 code for disease of capillaries, unspecified?
The ICD-10-CM code for disease of capillaries, unspecified is I78.9 (sometimes written as I789). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I78.9 (Diseases of capillaries) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report disease of capillaries, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I78.9 group to?
When disease of capillaries, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 301, 300, 299, with relative weights from 0.7132 to 1.5840 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of I78.9?
Under the General Equivalence Mappings, disease of capillaries, unspecified converts to ICD-9-CM 448.9 (capillary dis NEC/NOS). The mapping is approximate, so confirm the match fits the documentation.
