I78.0
Hereditary hemorrhagic telangiectasia
I78.0 (also written I780) is a billable ICD-10-CM diagnosis code for hereditary hemorrhagic telangiectasia. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 4 codes in category I78 (Diseases of capillaries). The Alphabetic Index lists it under 18 entries. Its coding notes include 10 Excludes2 entries.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
- 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.-)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Cardiac and Circulatory clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Inclusion terms
Conditions classified to this code.
- Rendu-Osler-Weber disease
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 18 entries
- Angioma, hemorrhagicum hereditaria
- Angiomatosis, hemorrhagic familial
- Angiomatosis, hereditary familial
- Babington's disease (familial hemorrhagic telangiectasia)
- Disease, diseased, Babington's (familial hemorrhagic telangiectasia)
- Disease, diseased, Goldstein's (familial hemorrhagic telangiectasia)
- Disease, diseased, Osler-Rendu (familial hemorrhagic telangiectasia)
- Disease, diseased, Rendu-Osler-Weber (familial hemorrhagic telangiectasia)
- Epistaxis (multiple), hereditary
- Goldstein's disease (familial hemorrhagic telangiectasia)
- Osler (-Weber) -Rendu disease
- Rendu-Osler-Weber disease or syndrome
Show 6 more
- Syndrome, Osler-Weber-Rendu
- Syndrome, Rendu-Osler-Weber
- Telangiectasia, telangiectasis (verrucous), familial
- Telangiectasia, telangiectasis (verrucous), hemorrhagic, hereditary (congenital) (senile)
- Telangiectasia, telangiectasis (verrucous), hereditary, hemorrhagic (congenital) (senile)
- Weber-Osler syndrome