Table 3.
Distribution of ICD-9-CM code combinations in each hereditary hemorrhagic telangiectasia algorithm group
| Group | ICD-9-CM codes | Diagnoses | N |
|---|---|---|---|
| A (n = 11) | (747.3 or 417.0) + 784.7 | Pulm AVM + epistaxis | 8 |
| (747.3 or 417.0) + 747.81 | Pulm AVM + brain AVM | 2 | |
| (747.3 or 417.0) + 537.82 | Pulm AVM + GIAng | 1 | |
| B (n = 9) | 747.81 + 537.82 | Brain AVM + upper GIAng | 4 |
| 747.81 + 569.84 | Brain AVM + GIAng | 5 | |
| C (n = 143) | 784.7 + 53782 | Epistaxis + upper GIAng | 17 |
| 784.7 + 53783 | Epistaxis + upper GIAng w/ hemorrhage | 3 | |
| 784.7 + 56984 | Epistaxis + GIAng | 17 | |
| 784.7 + 56985 | Epistaxis + GIAng w/ hemorrhage | 7 | |
| 784.7 + 4489 | Epistaxis + other capillary diseases | 99 |
AVM = arteriovenous malformation; GIAng = gastrointestinal angiodysplasia; ICD-9-CM = International Classification of Diseases, Ninth Revision-Clinical Modification; Pulm = pulmonary; w/ = with.