AAB Basic Knowledge Examination sample prep Questions and
Answers; verified for accuracy latest 2025/2026
Beer's Law - correct answer states that the concentration of a substance is
directly proportional to the amount of radiant energy absorbed or inversely
proportional to the logarithm of the transmitted radiant energy
Chain of Custody - correct answer refers to the chronological documentation
and/or paper trail showing the procurement, custody, control, transfer,
analysis, and disposition of the specimen
Purpose of Chain of Custody - correct answer required for any specimen that
will be used as evidence in a legal proceeding
Examples of a Chain of Custody - correct answer -legal blood alcohol to
prosecute DUI cases
-department of transportation drug testing
-paternity testing
-DNA analysis
-Rape cases
Reflex testing - correct answer performance of a test on a patient specimen
only after a particular analyte is abnormal or outside of a predetermined range
Example of reflex testing - correct answer Positive sickle cell screen reflexes:
a hemoglobin electrophoresis
Positive ANA test reflexes: an ANA profile for specific antibodies
Positive Chemstrip leukocyte esterase reflex: a urine culture
,Definition of CPT Codes (Current Procedural Testing) - correct answer listing
of standardized descriptions and five-character, alpha-numeric codes with a
text descriptor that medical coders and billers use to report health care
services and procedures to payers for reimbursement
Purpose of CPT codes - correct answer provide a uniform language
accurately describing medical, surgical, and diagnostic services
Category I CPT - correct answer -describes a procedure or service identified
with a 5 digit CPT code and descriptor nomenclature
-codes between 800000-899999
Category II CPT - correct answer -supplemental tracking alpha-numeric
codes that can be used for performance measurement
-use of these codes is usually optional
-codes are not required for correct coding and may/may not be used as a
substitute for Category I codes
Category III CPT - correct answer -temporary set of tracking alpha-numeric
codes for new & emerging technologies
-codes are intended to facilitate data collection on and assessment of new
services and procedures
-may not conform to the usual Category I code requirements
Examples of CPT codes - correct answer -81000
-82000
-85000
-86000
-87000
, Definition of Code Modifiers - correct answer provides the means by which
the medical coder or biller can report that a service or procedure performed by
a physician or provider has been altered by some specific circumstance but
not changed in its definition or code
Reasons for Using Code Modifiers - correct answer 1. A service or procedure
has both a professional and a technical component
2. A service or procedure was performed by more than one physician in more
than 1 location
3. A service or procedure has been increased or reduced
4. Only part of a service was performed
5. an adjunctive service was performed
6. a bilateral procedure was performed
7. a service or procedure was provided more than once
8. unusual events occurred
9. specific information, such as on which digit a procedure was performed
Examples of Code Modifiers - correct answer 26 professional component
59 distinct procedural service
91 repeat clinical diagnostic laboratory test
Scoring of Moderate Complexity Procedures - correct answer Score of 1:
indicates lowest level of complexity
Score of 2: assigned to a criteria heading when the characteristics for a
particular test are intermediate between the descriptions listed for scores 1
and 3
Score of 3: indicates highest level of complexity
Answers; verified for accuracy latest 2025/2026
Beer's Law - correct answer states that the concentration of a substance is
directly proportional to the amount of radiant energy absorbed or inversely
proportional to the logarithm of the transmitted radiant energy
Chain of Custody - correct answer refers to the chronological documentation
and/or paper trail showing the procurement, custody, control, transfer,
analysis, and disposition of the specimen
Purpose of Chain of Custody - correct answer required for any specimen that
will be used as evidence in a legal proceeding
Examples of a Chain of Custody - correct answer -legal blood alcohol to
prosecute DUI cases
-department of transportation drug testing
-paternity testing
-DNA analysis
-Rape cases
Reflex testing - correct answer performance of a test on a patient specimen
only after a particular analyte is abnormal or outside of a predetermined range
Example of reflex testing - correct answer Positive sickle cell screen reflexes:
a hemoglobin electrophoresis
Positive ANA test reflexes: an ANA profile for specific antibodies
Positive Chemstrip leukocyte esterase reflex: a urine culture
,Definition of CPT Codes (Current Procedural Testing) - correct answer listing
of standardized descriptions and five-character, alpha-numeric codes with a
text descriptor that medical coders and billers use to report health care
services and procedures to payers for reimbursement
Purpose of CPT codes - correct answer provide a uniform language
accurately describing medical, surgical, and diagnostic services
Category I CPT - correct answer -describes a procedure or service identified
with a 5 digit CPT code and descriptor nomenclature
-codes between 800000-899999
Category II CPT - correct answer -supplemental tracking alpha-numeric
codes that can be used for performance measurement
-use of these codes is usually optional
-codes are not required for correct coding and may/may not be used as a
substitute for Category I codes
Category III CPT - correct answer -temporary set of tracking alpha-numeric
codes for new & emerging technologies
-codes are intended to facilitate data collection on and assessment of new
services and procedures
-may not conform to the usual Category I code requirements
Examples of CPT codes - correct answer -81000
-82000
-85000
-86000
-87000
, Definition of Code Modifiers - correct answer provides the means by which
the medical coder or biller can report that a service or procedure performed by
a physician or provider has been altered by some specific circumstance but
not changed in its definition or code
Reasons for Using Code Modifiers - correct answer 1. A service or procedure
has both a professional and a technical component
2. A service or procedure was performed by more than one physician in more
than 1 location
3. A service or procedure has been increased or reduced
4. Only part of a service was performed
5. an adjunctive service was performed
6. a bilateral procedure was performed
7. a service or procedure was provided more than once
8. unusual events occurred
9. specific information, such as on which digit a procedure was performed
Examples of Code Modifiers - correct answer 26 professional component
59 distinct procedural service
91 repeat clinical diagnostic laboratory test
Scoring of Moderate Complexity Procedures - correct answer Score of 1:
indicates lowest level of complexity
Score of 2: assigned to a criteria heading when the characteristics for a
particular test are intermediate between the descriptions listed for scores 1
and 3
Score of 3: indicates highest level of complexity
