E70.2Disorders of tyrosine metabolism

E70.2 is the ICD-10-CM diagnosis code for disorders of tyrosine metabolism. It belongs to category E70 (disorders of aromatic amino-acid metabolism), block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within E70 (disorders of aromatic amino-acid metabolism), E70.2 is specifically for disorders of tyrosine metabolism. Related codes cover classical phenylketonuria (E70.0), other hyperphenylalaninemias (E70.1), albinism (E70.3), disorders of histidine metabolism (E70.4), disorders of tryptophan metabolism (E70.5), other disorders of aromatic amino-acid metabolism (E70.8) and disorder of aromatic amino-acid metabolism, unspecified (E70.9).

To report this condition, pick the subcode that matches the documentation: E70.20 (unspecified), E70.21 (tyrosinemia) and E70.29 (metabolism).

Don't report E70.2 together with the conditions in its Excludes1 note: transitory tyrosinemia of newborn (P74.5).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.