The knee joint consists of three primary compartments:
1. Medial compartment: The inside part of the knee, which includes the femur and tibia interaction on the inner side.
2. Lateral compartment: The outside part of the knee, where the femur and tibia meet on the outer side.
3. Patellofemoral compartment: The area between the patella (kneecap) and the femur.
These three compartments are essential for knee joint stability and function, allowing movement and weight- bearing activities.
B: Trochlea groove and vestibular are not associated with knee anatomy.
C: Posterior malleolus, scapula, and fibular facet do not relate to knee compartments; the malleolus is in the ankle, scapula in the shoulder, and fibular facet is not part of the primary knee compartments.
D: Cochlea is unrelated to knee anatomy and refers to a part of the inner ear.
Thus, the correct answer is A. Medial, lateral, and patellofemoral.

Brackets [ ] in the ICD-10-CM Alphabetic Index are used to identify manifestation codes.
These codes cannot be reported as the principal diagnosis and must be sequenced after the underlying condition.
This is a frequently tested ICD-10-CM guideline concept.

In medical terminology, the suffix -graph refers to an instrument used for recording data or the process of recording. This suffix is commonly tested on the CPC exam.
Examples include:
Electrocardiograph - instrument used to record heart activity
Angiograph - instrument used to record images of blood vessels
To distinguish from related suffixes:
-gram = the record or image itself
-graphy = the process of recording
Thus, option A is correct.

The place of service code 22 is used for services performed in an outpatient hospital setting, including outpatient surgical floors. This code indicates that the procedure was done in a hospital but not requiring an inpatient admission.
AMA's CPT Professional Edition (current year), Place of Service Codes.