Gen arterial calcifcn of infancy with unsp genetic causality

This code represents a rare, severe genetic disorder characterized by widespread calcification of the arterial walls, typically presenting in infancy. The calcification leads to arterial stiffness, hypertension, and often heart failure, with a high mortality rate in early childhood. This specific code is used when the underlying genetic cause of the generalized arterial calcification of infancy (GACI) has not been identified or specified.

Apply this code for infants diagnosed with GACI where genetic testing has not been performed, is inconclusive, or has not yet identified a specific gene mutation. Documentation should clearly state "generalized arterial calcification of infancy" and indicate that the genetic causality is "unspecified" or "unknown." This code is appropriate when the clinical presentation is consistent with GACI but a definitive genetic diagnosis is pending or unobtainable.

• Ensure documentation explicitly states "unspecified genetic causality" to support this code.
• Do not use this code if a specific genetic mutation (e.g., ENPP1, ABCC6) has been identified; instead, use the more specific E83.821 or E83.828.
• Consider sequencing this code as a primary diagnosis when GACI is the principal reason for the encounter, followed by codes for associated manifestations like hypertension or heart failure.