Medical Coding Comprehensive Review
Medical Coding Comprehensive Review
Practice Questions, Answers, and Detailed Rationales
Medical Coding Comprehensive Review Practice Questions,
Answers, and Detailed Rationales
designed for nursing/healthcare learners. It focuses on ICD-10-CM, CPT, HCPCS,
documentation, sequencing, modifiers, medical necessity, and common coding
principles.
Question 1
Which coding system is primarily used in the United States to report diagnoses and medical conditions?
A. CPT
B. ICD-10-CM
C. HCPCS Level II
D. DRG
Correct Answer: B. ICD-10-CM
Detailed Rationale:
ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is used to classify
and report diagnoses, conditions, symptoms, injuries, and other reasons for healthcare encounters. It provides
standardized diagnostic terminology for healthcare reporting and reimbursement.
Why the Other Options Are Incorrect:
- A. CPT: Primarily reports physician and other qualified healthcare professional procedures and services. - C.
HCPCS Level II: Primarily reports supplies, equipment, medications, ambulance services, and certain services
not represented by CPT. - D. DRG: A classification system used primarily for hospital inpatient payment and
reimbursement grouping rather than diagnosis coding itself.
Question 2
Which coding system is primarily used to report physician procedures and professional services?
A. ICD-10-CM
B. CPT
C. ICD-10-PCS
D. MS-DRG
Correct Answer: B. CPT
Detailed Rationale:
Current Procedural Terminology (CPT), maintained by the American Medical Association, is used to report many
professional medical procedures and services. CPT codes are organized into categories covering evaluation
and management, surgery, radiology, pathology/laboratory, medicine, and other services.
Why the Other Options Are Incorrect:
- A. ICD-10-CM: Describes diagnoses and conditions. - C. ICD-10-PCS: Used for inpatient hospital procedure
coding in the United States. - D. MS-DRG: Groups inpatient hospital cases for reimbursement rather than
directly reporting professional procedures.
Question 3
What is the primary purpose of ICD-10-CM coding?
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, Medical Coding Comprehensive Review
A. To determine a nurse's staffing assignment
B. To classify diagnoses and health conditions
C. To calculate a patient's blood pressure
D. To identify hospital room numbers
Correct Answer: B. To classify diagnoses and health conditions
Detailed Rationale:
ICD-10-CM provides standardized codes for diseases, disorders, injuries, symptoms, and other health-related
conditions. Accurate diagnosis coding supports clinical documentation, billing, statistics, quality reporting, and
healthcare data analysis.
Why the Other Options Are Incorrect:
- A. Staffing assignments are not determined by ICD-10-CM codes. - C. Blood pressure is a clinical
measurement, not a purpose of diagnosis coding. - D. Room assignments are administrative and unrelated to
ICD-10-CM classification.
Question 4
A patient presents to the clinic with a documented diagnosis of type 2 diabetes mellitus without complications.
Which type of information is most important when selecting the ICD-10-CM code?
A. The patient's favorite medication
B. Whether the provider documented complications
C. The patient's room number
D. The nurse's preferred terminology
Correct Answer: B. Whether the provider documented complications
Detailed Rationale:
ICD-10-CM coding depends heavily on provider documentation. Diabetes codes distinguish uncomplicated
disease from diabetes with specific complications. The coder should review the documentation to determine
whether a complication is present and documented.
Why the Other Options Are Incorrect:
- A. Medication preference does not determine the diagnosis code. - C. Room number is irrelevant to diagnosis
classification. - D. Coding should follow standardized coding terminology and official guidance rather than
individual preference.
Question 5
What does CPT stand for?
A. Clinical Patient Treatment
B. Current Procedural Terminology
C. Comprehensive Procedure Table
D. Clinical Procedure Tracking
Correct Answer: B. Current Procedural Terminology
Detailed Rationale:
CPT stands for Current Procedural Terminology. CPT codes are used to report medical procedures and
professional services and are maintained by the American Medical Association.
Why the Other Options Are Incorrect:
- A. Clinical Patient Treatment is not the meaning of CPT. - C. Comprehensive Procedure Table is not the official
name. - D. Clinical Procedure Tracking is not what CPT stands for.
Question 6
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, Medical Coding Comprehensive Review
Which code set is commonly used for durable medical equipment and certain supplies?
A. HCPCS Level II
B. ICD-10-CM
C. ICD-10-PCS
D. CPT Category I only
Correct Answer: A. HCPCS Level II
Detailed Rationale:
HCPCS Level II codes are alphanumeric codes used for items and services such as durable medical equipment,
certain drugs, ambulance services, prosthetic devices, orthotics, and medical supplies.
Why the Other Options Are Incorrect:
- B. ICD-10-CM: Classifies diagnoses. - C. ICD-10-PCS: Reports inpatient hospital procedures. - D. CPT
Category I: Primarily reports physician and other qualified professional services and procedures.
Question 7
A provider documents "pneumonia" but does not specify the organism. What should the coder generally do?
A. Automatically assign a bacterial pneumonia code
B. Code the documented diagnosis to the appropriate level of specificity supported by the documentation
C. Assume the patient has viral pneumonia
D. Code the patient's chief complaint instead of the diagnosis
Correct Answer: B. Code the documented diagnosis to the appropriate level of specificity supported by
the documentation
Detailed Rationale:
Coders should not independently infer a causative organism that the provider did not document. The code
should reflect the available documentation and applicable ICD-10-CM guidelines. When additional clarification
is clinically necessary and permitted, a query may be appropriate.
Why the Other Options Are Incorrect:
- A. A bacterial cause cannot automatically be assumed. - C. Viral infection also cannot be assumed without
documentation. - D. When a definitive diagnosis is documented, coding generally follows the applicable
diagnosis rather than simply substituting the presenting symptom.
Question 8
What is the purpose of a medical coding modifier?
A. To replace the diagnosis code
B. To provide additional information about a reported procedure or service
C. To identify the patient's insurance company
D. To determine the patient's age
Correct Answer: B. To provide additional information about a reported procedure or service
Detailed Rationale:
CPT modifiers can provide additional information about circumstances surrounding a service without changing
the basic procedure code. Depending on the modifier, they can indicate circumstances such as a distinct
procedural service, multiple procedures, or professional versus technical components.
Why the Other Options Are Incorrect:
- A. Modifiers supplement procedure coding; they do not replace diagnosis codes. - C. Insurance identification
is handled through payer and patient information. - D. Patient age is demographic information, not the primary
purpose of modifiers.
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Question 9
Which organization maintains CPT codes?
A. American Medical Association
B. World Health Organization exclusively
C. Food and Drug Administration
D. Centers for Disease Control and Prevention exclusively
Correct Answer: A. American Medical Association
Detailed Rationale:
The American Medical Association (AMA) maintains the CPT code set. CPT is used extensively to report medical
procedures and professional services in the United States.
Why the Other Options Are Incorrect:
- B. WHO maintains the international ICD classification framework but does not maintain the U.S. CPT code set.
- C. FDA regulates drugs, biologics, devices, and other products; it does not maintain CPT. - D. CDC is heavily
involved in ICD-10-CM maintenance and public-health classification activities but does not maintain CPT.
Question 10
Which organization is responsible for maintaining ICD-10-CM in the United States?
A. American Medical Association alone
B. CDC's National Center for Health Statistics and CMS
C. FDA
D. Joint Commission
Correct Answer: B. CDC's National Center for Health Statistics and CMS
Detailed Rationale:
In the United States, ICD-10-CM is maintained through the cooperative efforts of the Centers for Disease
Control and Prevention's National Center for Health Statistics (NCHS) and the Centers for Medicare & Medicaid
Services (CMS).
Why the Other Options Are Incorrect:
- A. AMA maintains CPT, not ICD-10-CM. - C. FDA regulates healthcare products and does not maintain ICD-10-
CM. - D. The Joint Commission accredits and certifies healthcare organizations and does not maintain ICD-10-
CM.
Question 11
What does ICD-10-PCS primarily identify?
A. Inpatient hospital procedures
B. Outpatient diagnoses
C. Physician office diagnoses
D. Prescription drug names
Correct Answer: A. Inpatient hospital procedures
Detailed Rationale:
ICD-10-PCS is the procedure classification system used for reporting procedures performed in inpatient
hospital settings in the United States. It uses a seven-character alphanumeric structure.
Why the Other Options Are Incorrect:
- B. Outpatient diagnoses are generally reported using ICD-10-CM. - C. Physician office diagnoses are reported
using ICD-10-CM. - D. Prescription drugs are not represented primarily by ICD-10-PCS.
Medical Coding Comprehensive Review | Practice Resource • Page 4
Medical Coding Comprehensive Review
Practice Questions, Answers, and Detailed Rationales
Medical Coding Comprehensive Review Practice Questions,
Answers, and Detailed Rationales
designed for nursing/healthcare learners. It focuses on ICD-10-CM, CPT, HCPCS,
documentation, sequencing, modifiers, medical necessity, and common coding
principles.
Question 1
Which coding system is primarily used in the United States to report diagnoses and medical conditions?
A. CPT
B. ICD-10-CM
C. HCPCS Level II
D. DRG
Correct Answer: B. ICD-10-CM
Detailed Rationale:
ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is used to classify
and report diagnoses, conditions, symptoms, injuries, and other reasons for healthcare encounters. It provides
standardized diagnostic terminology for healthcare reporting and reimbursement.
Why the Other Options Are Incorrect:
- A. CPT: Primarily reports physician and other qualified healthcare professional procedures and services. - C.
HCPCS Level II: Primarily reports supplies, equipment, medications, ambulance services, and certain services
not represented by CPT. - D. DRG: A classification system used primarily for hospital inpatient payment and
reimbursement grouping rather than diagnosis coding itself.
Question 2
Which coding system is primarily used to report physician procedures and professional services?
A. ICD-10-CM
B. CPT
C. ICD-10-PCS
D. MS-DRG
Correct Answer: B. CPT
Detailed Rationale:
Current Procedural Terminology (CPT), maintained by the American Medical Association, is used to report many
professional medical procedures and services. CPT codes are organized into categories covering evaluation
and management, surgery, radiology, pathology/laboratory, medicine, and other services.
Why the Other Options Are Incorrect:
- A. ICD-10-CM: Describes diagnoses and conditions. - C. ICD-10-PCS: Used for inpatient hospital procedure
coding in the United States. - D. MS-DRG: Groups inpatient hospital cases for reimbursement rather than
directly reporting professional procedures.
Question 3
What is the primary purpose of ICD-10-CM coding?
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, Medical Coding Comprehensive Review
A. To determine a nurse's staffing assignment
B. To classify diagnoses and health conditions
C. To calculate a patient's blood pressure
D. To identify hospital room numbers
Correct Answer: B. To classify diagnoses and health conditions
Detailed Rationale:
ICD-10-CM provides standardized codes for diseases, disorders, injuries, symptoms, and other health-related
conditions. Accurate diagnosis coding supports clinical documentation, billing, statistics, quality reporting, and
healthcare data analysis.
Why the Other Options Are Incorrect:
- A. Staffing assignments are not determined by ICD-10-CM codes. - C. Blood pressure is a clinical
measurement, not a purpose of diagnosis coding. - D. Room assignments are administrative and unrelated to
ICD-10-CM classification.
Question 4
A patient presents to the clinic with a documented diagnosis of type 2 diabetes mellitus without complications.
Which type of information is most important when selecting the ICD-10-CM code?
A. The patient's favorite medication
B. Whether the provider documented complications
C. The patient's room number
D. The nurse's preferred terminology
Correct Answer: B. Whether the provider documented complications
Detailed Rationale:
ICD-10-CM coding depends heavily on provider documentation. Diabetes codes distinguish uncomplicated
disease from diabetes with specific complications. The coder should review the documentation to determine
whether a complication is present and documented.
Why the Other Options Are Incorrect:
- A. Medication preference does not determine the diagnosis code. - C. Room number is irrelevant to diagnosis
classification. - D. Coding should follow standardized coding terminology and official guidance rather than
individual preference.
Question 5
What does CPT stand for?
A. Clinical Patient Treatment
B. Current Procedural Terminology
C. Comprehensive Procedure Table
D. Clinical Procedure Tracking
Correct Answer: B. Current Procedural Terminology
Detailed Rationale:
CPT stands for Current Procedural Terminology. CPT codes are used to report medical procedures and
professional services and are maintained by the American Medical Association.
Why the Other Options Are Incorrect:
- A. Clinical Patient Treatment is not the meaning of CPT. - C. Comprehensive Procedure Table is not the official
name. - D. Clinical Procedure Tracking is not what CPT stands for.
Question 6
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, Medical Coding Comprehensive Review
Which code set is commonly used for durable medical equipment and certain supplies?
A. HCPCS Level II
B. ICD-10-CM
C. ICD-10-PCS
D. CPT Category I only
Correct Answer: A. HCPCS Level II
Detailed Rationale:
HCPCS Level II codes are alphanumeric codes used for items and services such as durable medical equipment,
certain drugs, ambulance services, prosthetic devices, orthotics, and medical supplies.
Why the Other Options Are Incorrect:
- B. ICD-10-CM: Classifies diagnoses. - C. ICD-10-PCS: Reports inpatient hospital procedures. - D. CPT
Category I: Primarily reports physician and other qualified professional services and procedures.
Question 7
A provider documents "pneumonia" but does not specify the organism. What should the coder generally do?
A. Automatically assign a bacterial pneumonia code
B. Code the documented diagnosis to the appropriate level of specificity supported by the documentation
C. Assume the patient has viral pneumonia
D. Code the patient's chief complaint instead of the diagnosis
Correct Answer: B. Code the documented diagnosis to the appropriate level of specificity supported by
the documentation
Detailed Rationale:
Coders should not independently infer a causative organism that the provider did not document. The code
should reflect the available documentation and applicable ICD-10-CM guidelines. When additional clarification
is clinically necessary and permitted, a query may be appropriate.
Why the Other Options Are Incorrect:
- A. A bacterial cause cannot automatically be assumed. - C. Viral infection also cannot be assumed without
documentation. - D. When a definitive diagnosis is documented, coding generally follows the applicable
diagnosis rather than simply substituting the presenting symptom.
Question 8
What is the purpose of a medical coding modifier?
A. To replace the diagnosis code
B. To provide additional information about a reported procedure or service
C. To identify the patient's insurance company
D. To determine the patient's age
Correct Answer: B. To provide additional information about a reported procedure or service
Detailed Rationale:
CPT modifiers can provide additional information about circumstances surrounding a service without changing
the basic procedure code. Depending on the modifier, they can indicate circumstances such as a distinct
procedural service, multiple procedures, or professional versus technical components.
Why the Other Options Are Incorrect:
- A. Modifiers supplement procedure coding; they do not replace diagnosis codes. - C. Insurance identification
is handled through payer and patient information. - D. Patient age is demographic information, not the primary
purpose of modifiers.
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, Medical Coding Comprehensive Review
Question 9
Which organization maintains CPT codes?
A. American Medical Association
B. World Health Organization exclusively
C. Food and Drug Administration
D. Centers for Disease Control and Prevention exclusively
Correct Answer: A. American Medical Association
Detailed Rationale:
The American Medical Association (AMA) maintains the CPT code set. CPT is used extensively to report medical
procedures and professional services in the United States.
Why the Other Options Are Incorrect:
- B. WHO maintains the international ICD classification framework but does not maintain the U.S. CPT code set.
- C. FDA regulates drugs, biologics, devices, and other products; it does not maintain CPT. - D. CDC is heavily
involved in ICD-10-CM maintenance and public-health classification activities but does not maintain CPT.
Question 10
Which organization is responsible for maintaining ICD-10-CM in the United States?
A. American Medical Association alone
B. CDC's National Center for Health Statistics and CMS
C. FDA
D. Joint Commission
Correct Answer: B. CDC's National Center for Health Statistics and CMS
Detailed Rationale:
In the United States, ICD-10-CM is maintained through the cooperative efforts of the Centers for Disease
Control and Prevention's National Center for Health Statistics (NCHS) and the Centers for Medicare & Medicaid
Services (CMS).
Why the Other Options Are Incorrect:
- A. AMA maintains CPT, not ICD-10-CM. - C. FDA regulates healthcare products and does not maintain ICD-10-
CM. - D. The Joint Commission accredits and certifies healthcare organizations and does not maintain ICD-10-
CM.
Question 11
What does ICD-10-PCS primarily identify?
A. Inpatient hospital procedures
B. Outpatient diagnoses
C. Physician office diagnoses
D. Prescription drug names
Correct Answer: A. Inpatient hospital procedures
Detailed Rationale:
ICD-10-PCS is the procedure classification system used for reporting procedures performed in inpatient
hospital settings in the United States. It uses a seven-character alphanumeric structure.
Why the Other Options Are Incorrect:
- B. Outpatient diagnoses are generally reported using ICD-10-CM. - C. Physician office diagnoses are reported
using ICD-10-CM. - D. Prescription drugs are not represented primarily by ICD-10-PCS.
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