Specify whether due to:
Alzheimer’s disease  (pp. 611–614)
Frontotemporal lobar degeneration  (pp. 614–618)
Lewy body disease (pp. 618–621)
Vascular disease (pp. 621–624)
Traumatic brain injury  (pp. 624–627)
Substance/medication use  (pp. 627–632)
HIV infection  (pp. 632–634)
Prion disease  (pp. 634–636)
Parkinson’s disease  (pp. 636–638)
Huntington’s disease (pp. 638–641)
Another medical condition  (pp. 641–642)
Multiple etiologies (pp. 642–643)
Unspecified  (p. 643)
Coding note: For mild neurocognitive disorder due to any of the medical etiologies listed
above, code 331.83 (G31.84).  Do not  use additional codes for the presumed etiological
medical conditions. For substance/medicati on-induced mild neurocognitive disorder, code
based on type of substance; see “Substance/ Medication-Induced Major or Mild Neurocog-
nitive Disorder.” For unspecified mild neurocognitive disorder, code 799.59 (R41.9).