CAISS LATEST EXAM PRACTICE TEST
2025-2026 WITH ACTUAL QUESTIONS AND
ANSWERS 100% CORRECT
What is NISS?
NISS is the sum of the suqares of the 3 highest AIS scores
anywhere in the body; e.g. 16 + 9 + 4 = 29
What is MAIS?
MAIS is the highest AIS severity score in a patient with multiple
injuries. E.g. AIS 4
Is Asphxia a codeable sequela?
Yes
Skin Tears are coded as a _________ to the appropriate
location on the patient and assigned to the _______ ISS body
region
"Laceration External"
T/F: LeFort must be specified in the medical documentation
to use the LeFort Codes
True. If not mentioned, code individual fractures
Soft palate perforations are coded as _______ and hard
palate perforations are coded as _______
Soft palate perforations are coded as lacerations and hard palate
as fractures. If palate is not specified, code it as a fracture
What does ISS stand for and what is the range?
,Injury Severity Score and it ranges from 1-75
How Are Most of the Chapters Organized?
1. Whole Area 2. Vessels 3. Nerves 4. Internal Organs 6. Skeletal
What do the 6 digits in the predot stand for?
1 = body region 2 = type of anatomical structure 3,4 = specific
anatomical structure 5,6 = level of injury || Femoral shaft FX:
851814.3 8 = body region: lower extremity 5 = type of structure:
skeletal 18 = specific structure: femur 14 = level of injury: shaft"
What does the 7th digit in the AIS code represent?
Severity Score
What is a vessel thrombosis?
It's a vessel injury that results in occlusion. Examples are an
intimal tear or a dissection
What does the post dot descriptions for the various numbers
1-minor 2-moderate 3-serious 4-severe 5-critical 6-Maximal and
currently untreatable"
What are the 6 ISS body regions?
"1. Head or neck 2. Face 3. Chest 4. Abdominal or pelvic contents
5. Extremities and Pelvis 6. External
What body region is supratentorial coded to?
Cerebrum
What body region is the interpeduncular fossa (cistern) basal
cisterns coded to?
Brainstem
,Occipital Condyles are coded to the skull base or the vault?
Skull Base
Head and Spine Injuries: Within the first ____, patients with
transient signs and symptoms should be coded even if they
are resolved within the ___ period.
24 hrs
What does a crush injury to the head region involve
Must involve massive destruction of skull, brain and intracranial
contents
What code is assigned to a 2 cm penetrating injury to skull
116002.3: Penetrating injury to skull-superficial = </= 2 cm
beneath entrance
a major head laceration with code 110604.2 is ____ cm long
or longer and _______
10 cm or longer and into subcutaneous tissue
Head laceration with blood loss > ____ is assigned 110606.3
> 20% by volume
Minor scalp avulsion is less than or equal to ____cm2
</= 100 cm2
Major scalp avulsion is greater than ____cm2
> 100 cm2
Scalp avulsion with major blood loss has greater than ____
percent by volume
> 20% by volume
, Head artery injuries include ______, ______ and ____
lacerations, thrombosis (occlusions) and traumatic aneurysms
In the Head Region, lacerations or thrombosis to the sinuses
are coded in what section
Vessels: includes Sinus NFS, Cavernous sinus, sigmoid sinus,
straight sinus, Saggital (Superior longitudinal) Sinus, and
Transverse Sinus
How do you code a through and through GSW to skull
Code as a single injury: 116004.5 greater than 2 cm penetration.
However if you know more details to specific organ damage this
cannot be used
In a penetrating injury to the head, if the skull is not
penetrated how do you code the entry?
Coded as a scalp laceration
True or false: cranial nerve injuries may be described only by
the type of dysfunction that exists in the normal nerve
activity
TRUE; contusions and lacerations; palsy and paralysis
For cranial nerves how do you code total loss of nerve
function (paralysis)? And how do you code partial loss of
function a.k.a. paresis?
Code total loss as a laceration and partial loss as a contusion.
Name the first 6 cranial nerves
"I: Olfactory II. Optic III: Oculomotor IV Trochlear V: Trigeminal VI:
Abducens
2025-2026 WITH ACTUAL QUESTIONS AND
ANSWERS 100% CORRECT
What is NISS?
NISS is the sum of the suqares of the 3 highest AIS scores
anywhere in the body; e.g. 16 + 9 + 4 = 29
What is MAIS?
MAIS is the highest AIS severity score in a patient with multiple
injuries. E.g. AIS 4
Is Asphxia a codeable sequela?
Yes
Skin Tears are coded as a _________ to the appropriate
location on the patient and assigned to the _______ ISS body
region
"Laceration External"
T/F: LeFort must be specified in the medical documentation
to use the LeFort Codes
True. If not mentioned, code individual fractures
Soft palate perforations are coded as _______ and hard
palate perforations are coded as _______
Soft palate perforations are coded as lacerations and hard palate
as fractures. If palate is not specified, code it as a fracture
What does ISS stand for and what is the range?
,Injury Severity Score and it ranges from 1-75
How Are Most of the Chapters Organized?
1. Whole Area 2. Vessels 3. Nerves 4. Internal Organs 6. Skeletal
What do the 6 digits in the predot stand for?
1 = body region 2 = type of anatomical structure 3,4 = specific
anatomical structure 5,6 = level of injury || Femoral shaft FX:
851814.3 8 = body region: lower extremity 5 = type of structure:
skeletal 18 = specific structure: femur 14 = level of injury: shaft"
What does the 7th digit in the AIS code represent?
Severity Score
What is a vessel thrombosis?
It's a vessel injury that results in occlusion. Examples are an
intimal tear or a dissection
What does the post dot descriptions for the various numbers
1-minor 2-moderate 3-serious 4-severe 5-critical 6-Maximal and
currently untreatable"
What are the 6 ISS body regions?
"1. Head or neck 2. Face 3. Chest 4. Abdominal or pelvic contents
5. Extremities and Pelvis 6. External
What body region is supratentorial coded to?
Cerebrum
What body region is the interpeduncular fossa (cistern) basal
cisterns coded to?
Brainstem
,Occipital Condyles are coded to the skull base or the vault?
Skull Base
Head and Spine Injuries: Within the first ____, patients with
transient signs and symptoms should be coded even if they
are resolved within the ___ period.
24 hrs
What does a crush injury to the head region involve
Must involve massive destruction of skull, brain and intracranial
contents
What code is assigned to a 2 cm penetrating injury to skull
116002.3: Penetrating injury to skull-superficial = </= 2 cm
beneath entrance
a major head laceration with code 110604.2 is ____ cm long
or longer and _______
10 cm or longer and into subcutaneous tissue
Head laceration with blood loss > ____ is assigned 110606.3
> 20% by volume
Minor scalp avulsion is less than or equal to ____cm2
</= 100 cm2
Major scalp avulsion is greater than ____cm2
> 100 cm2
Scalp avulsion with major blood loss has greater than ____
percent by volume
> 20% by volume
, Head artery injuries include ______, ______ and ____
lacerations, thrombosis (occlusions) and traumatic aneurysms
In the Head Region, lacerations or thrombosis to the sinuses
are coded in what section
Vessels: includes Sinus NFS, Cavernous sinus, sigmoid sinus,
straight sinus, Saggital (Superior longitudinal) Sinus, and
Transverse Sinus
How do you code a through and through GSW to skull
Code as a single injury: 116004.5 greater than 2 cm penetration.
However if you know more details to specific organ damage this
cannot be used
In a penetrating injury to the head, if the skull is not
penetrated how do you code the entry?
Coded as a scalp laceration
True or false: cranial nerve injuries may be described only by
the type of dysfunction that exists in the normal nerve
activity
TRUE; contusions and lacerations; palsy and paralysis
For cranial nerves how do you code total loss of nerve
function (paralysis)? And how do you code partial loss of
function a.k.a. paresis?
Code total loss as a laceration and partial loss as a contusion.
Name the first 6 cranial nerves
"I: Olfactory II. Optic III: Oculomotor IV Trochlear V: Trigeminal VI:
Abducens
