Neurological Exam
Evaluate for rigidity/waxy flexibility (move arm with alternating light/heavy force)
CBC
BMP
D-Dimer
Patients w/<unk>  typically have levels >500 ng/mL.
Creatinine Kinase
r/o neuroleptic malignant syndrome
Liver Function Tests
r/o neuroleptic malignant syndrome
(+/-) CSF studies
r/o CNS infections
Patients w/<unk>  typically have levels >500 ng/mL.
r/o neuroleptic malignant syndrome
r/o neuroleptic malignant syndrome
r/o CNS infections
Head CT/MRI
r/o treatable mass lesions
r/o treatable mass lesions
To meet DSM-V criteria for diagnosis of<unk> , patient must present with at least 3 of the following features:
Stupor, Catalepsy, Waxy flexibility, Mutism, Negativism, Posturing, Mannerism, Stereotypy, Agitation, Grimacing, Echolalia, Echopraxia
Stupor, Catalepsy, Waxy flexibility, Mutism, Negativism, Posturing, Mannerism, Stereotypy, Agitation, Grimacing, Echolalia, Echopraxia
Catatonia
Hypoxic encephalopathy
Dysphonia
Acute toxic-metabolic encephalopathy 
Opsoclonus
Hypoglycemia
Tremor
Hyperosmolar state 