Caiss Exam Study Guide 2026 Practice Materials

CAISS EXAM STUDY GUIDE 2026 PRACTICE
MATERIALS

●● What makes up the Meninges?. Answer: Dura
Mater(epidural/subdural), Arachnoid(csf), pia matter(vascular
membrane)


●● What are the regions of the brain?. Answer: Brain Stem, Cerebellum,
Cerebrum


●● What is a Focal Brain Injury?. Answer: Space occupying lesion in
which the brain will shift or herniate


●● What is a Diffuse Brain Injury?. Answer: Global/Widespread
damaging affecting consciousness


●● In the skull; what does "Compound" mean?. Answer: Open Fracture


●● Coding of brain injuries should be done when?. Answer: At 24 hours
or at initial confirmed diagnosis if later than 24 hours.


●● When can LOC be coded?. Answer: When there is convincing
evidence of head trauma and the diagnosis is made by a physician.

, ●● Provider diagnosis the patient with a "Closed Head Injury" how do
you code this?. Answer: 100099.9; NFS


●● Patient is diagnosed with a Compound Temporal Fracture and
laceration of the Temporal Artery. Can you code both injuries?. Answer:
Yes


●● When is a cranial nerve coded as a laceration?. Answer: When there
is Total Loss of Nerve Function Paralysis


●● When is a Cranial Nerve coded as a Contusion?. Answer: When there
is subtotal/partial loss of function. Paresis / Palsy


●● What affects the Injury Severity Score of brain lesions?. Answer:
Size, Location, Multiplicity


●● What does "Closed Cisterns" imply?. Answer: Brain Swelling


●● At what age are brain severity injuries adjusted?. Answer: 10 &
younger


●● If a single fracture involves both base and vault; how do you code?.
Answer: Code the most severe. If equal code to the point of origin.