CAISS – HEAD EXAM QUESTIONS WITH
100% CORRECT ANSWERS L LATEST
VERSION 2025/2026.
What does AIS define as part of the Head - ANS Scalp, Skull, Brain, Intracranial Vessels,
Cranial Nerves.
What makes up the Meninges? - ANS Dura Mater(epidural/subdural), Arachnoid(csf), pia
matter(vascular membrane)
What are the regions of the brain? - ANS Brain Stem, Cerebellum, Cerebrum
What is a Focal Brain Injury? - ANS Space occupying lesion in which the brain will shift or
herniate
What is a Diffuse Brain Injury? - ANS Global/Widespread damaging affecting consciousness
In the skull; what does "Compound" mean? - ANS Open Fracture
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Coding of brain injuries should be done when? - ANS At 24 hours or at initial confirmed
diagnosis if later than 24 hours.
When can LOC be coded? - ANS 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? -
ANS 100099.9; NFS
Patient is diagnosed with a Compound Temporal Fracture and laceration of the Temporal Artery.
Can you code both injuries? - ANS Yes
When is a cranial nerve coded as a laceration? - ANS When there is Total Loss of Nerve
Function Paralysis
When is a Cranial Nerve coded as a Contusion? - ANS When there is subtotal/partial loss of
function. Paresis / Palsy
What affects the Injury Severity Score of brain lesions? - ANS Size, Location, Multiplicity
What does "Closed Cisterns" imply? - ANS Brain Swelling
At what age are brain severity injuries adjusted? - ANS 10 & younger
If a single fracture involves both base and vault; how do you code? - ANS Code the most
severe. If equal code to the point of origin.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
100% CORRECT ANSWERS L LATEST
VERSION 2025/2026.
What does AIS define as part of the Head - ANS Scalp, Skull, Brain, Intracranial Vessels,
Cranial Nerves.
What makes up the Meninges? - ANS Dura Mater(epidural/subdural), Arachnoid(csf), pia
matter(vascular membrane)
What are the regions of the brain? - ANS Brain Stem, Cerebellum, Cerebrum
What is a Focal Brain Injury? - ANS Space occupying lesion in which the brain will shift or
herniate
What is a Diffuse Brain Injury? - ANS Global/Widespread damaging affecting consciousness
In the skull; what does "Compound" mean? - ANS Open Fracture
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Coding of brain injuries should be done when? - ANS At 24 hours or at initial confirmed
diagnosis if later than 24 hours.
When can LOC be coded? - ANS 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? -
ANS 100099.9; NFS
Patient is diagnosed with a Compound Temporal Fracture and laceration of the Temporal Artery.
Can you code both injuries? - ANS Yes
When is a cranial nerve coded as a laceration? - ANS When there is Total Loss of Nerve
Function Paralysis
When is a Cranial Nerve coded as a Contusion? - ANS When there is subtotal/partial loss of
function. Paresis / Palsy
What affects the Injury Severity Score of brain lesions? - ANS Size, Location, Multiplicity
What does "Closed Cisterns" imply? - ANS Brain Swelling
At what age are brain severity injuries adjusted? - ANS 10 & younger
If a single fracture involves both base and vault; how do you code? - ANS Code the most
severe. If equal code to the point of origin.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
