`E70.40` Disorders of histidine metabolism, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Risk adjustment (HCC)

CMS-HCC V22: HCC 23 — Other Significant Endocrine and Metabolic Disorders
RxHCC V08: HCC 43 — Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders
ESRD V24: HCC 23

Defines the logic of DRG(s) 642 in MDC 10.

Type 1 Excludes: E72 Other disorders of amino-acid metabolism ("aromatic amino-acid metabolism (E70.-)")
Type 2 Excludes: G11 Hereditary ataxia ("metabolic disorders (E70-E88)")
Code First: G63 Polyneuropathy in diseases classified elsewhere ("metabolic diseases (E70-E88)")
Type 2 Excludes: G71 Primary disorders of muscles ("metabolic disorders (E70-E88)")
Code First: H42 Glaucoma in diseases classified elsewhere ("specified metabolic disorder (E70-E88)")
Type 2 Excludes: N25.0 Renal osteodystrophy ("metabolic disorders classifiable to E70-E88")
Type 2 Excludes: N25.81 Secondary hyperparathyroidism of renal origin ("metabolic disorders classifiable to E70-E88")
Type 1 Excludes: P59 Neonatal jaundice from other and unspecified causes ("jaundice due to inborn errors of metabolism (E70-E88)")
Type 1 Excludes: R79 Other abnormal findings of blood chemistry ("specific findings indicating disorder of amino-acid metabolism (E70-E72)")
Type 1 Excludes: R79.83 Abnormal findings of blood amino-acid level ("disorders of amino-acid metabolism (E70-E72)")