Unlock hundreds more features
Save your Quiz to the Dashboard
View and Export Results
Use AI to Create Quizzes and Analyse Results

OR
Sign inSign in with Facebook
Sign inSign in with Google
Quizzes > Health & Medicine

ICD-10-CM Chapters 20-21 Quiz: External Causes & Reasons for Encounter

Quick, free ICD-10 external causes quiz with Chapter 21 encounters. Instant results.

Editorial: Review CompletedCreated By: Meghan Fraser-ElviraUpdated Aug 28, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration showing medical icons and quiz title ICD10 Chapters 20 and 21 on golden yellow background

Use this ICD-10-CM Chapters 20 and 21 quiz to practice external causes and reasons for healthcare encounters. Get instant results, spot gaps fast, and build confidence. For more drilling, try an icd 10 practice test and round out documentation skills with a short medical coding quiz.

What is the code range for ICD-10 Chapter 21 (Factors influencing health status and contact with health services)?
V00 - Y99
C00 - D48
A00 - B99
Z00 - Z99
ICD-10 Chapter 21 covers factors influencing health status and contact with health services, which are coded in the range Z00 - Z99. These codes capture reasons for encounters like examinations, prophylactic measures, and aftercare. Chapter 20 (V00 - Y99) is for external causes, not health status factors.
Which of the following is a typical reason for encounter coded in Chapter 21?
Acute appendicitis
Exposure to fire
Routine health examination
Fracture of the femur
Routine health examinations such as annual check-ups are captured in Chapter 21 under Z00 codes. Fractures and acute conditions are in Chapters 19 and 11 respectively, while exposure to fire is an external cause in Chapter 20.
What Z code would you use for immunization against influenza?
Z01.89
Z29.9
Z00.0
Z23
Z23 is used for encounters for immunization, including influenza vaccines. Z00.0 is for general examinations in children, Z01.89 is for other specified examinations, and Z29.9 covers prophylactic measures unspecified.
Which code represents a routine child health examination?
Z00.129
Z00.00
Z00.1
Z02.8
Z00.129 is the correct code for a routine child health examination without abnormal findings. Z00.1 is for adult general health exams, Z00.00 is initial general examination without abnormal findings, and Z02.8 is for administrative exams for other specified reasons.
What code from Chapter 21 indicates follow-up examination after treatment for malignant neoplasm?
Z09
Z85.9
Z07
Z08
Z08 is used for follow-up examinations after treatment for malignant neoplasms. Z09 is for follow-up after treatment for conditions other than neoplasms, Z07 covers special examinations post-accident, and Z85.9 is a personal history of malignant neoplasm.
Which code from Chapter 20 would you assign for an accidental fall from a ladder?
X49
V15.4
Y92.2
W11
W11 is the correct code for a fall from ladder. X49 is for accidental poisoning, Y92.2 indicates the place of occurrence, and V15.4 is a personal history of falls.
Which Z code is used to document potential exposure to communicable diseases?
Z20.2
Z29.2
Z20.3
Z20.9
Z20.2 is used for contact with and exposure to infections with a confirmed TB contact. Z20.9 is unspecified exposure to communicable disease, Z20.3 is contact with and exposure to other viral diseases, and Z29.2 is prophylactic administration of blood products.
Which statement best differentiates Chapter 20 and Chapter 21 codes?
Chapter 20 codes family history; Chapter 21 codes personal history.
Chapter 20 codes external causes; Chapter 21 codes reasons for healthcare encounters.
Chapter 20 codes procedures; Chapter 21 codes medications.
Chapter 20 codes symptoms; Chapter 21 codes diagnoses.
Chapter 20 (V00 - Y99) covers external causes of morbidity, such as accidents and events, while Chapter 21 (Z00 - Z99) captures reasons for encounters and factors influencing health status. Neither chapter is for symptoms vs diagnoses, nor procedures or medications.
What Z code is used for a pre-procedural cardiovascular examination?
Z01.6
Z01.811
Z01.810
Z01.89
Z01.810 is used for a pre-procedural cardiovascular examination. Z01.89 covers other specified examinations, Z01.811 is pre-procedural respiratory examination, and Z01.6 is preoperative cardiovascular examination, not specific to procedures.
Which Z code should be used for counseling on diet and nutrition?
Z71.3
Z73.3
Z72.4
Z99.2
Z71.3 is the code for dietary counseling and surveillance. Z72.4 is for lack of physical exercise, Z73.3 for stress, and Z99.2 for dependence on kidney dialysis.
When coding an encounter for therapy after hip replacement, which Z code is appropriate?
Z47.1
Z96.641
Z48.31
Z98.890
Z47.1 is used for aftercare following arthroplasty of hip. Z48.31 is care involving plastic surgery, Z96.641 is artificial hip joint status, and Z98.890 is other specified postprocedural states.
How would you code an encounter for routine screening mammogram for high-risk patient?
Z80.3
Z01.818
Z12.31
Z12.39
Z12.31 is for screening mammogram for high-risk patient. Z12.39 covers other screening mammograms, Z80.3 is family history of malignant neoplasm of breast, and Z01.818 is pre-procedural other specified examination.
Which Z code combination is correct for an encounter involving administration of chemotherapy and follow-up of post-mastectomy status?
Z51.11 and Z85.3
Z51.0 and Z80.3
Z51.11 and Z90.13
Z51.10 and Z98.89
Z51.11 is for encounters for antineoplastic chemotherapy and Z85.3 is personal history of malignant neoplasm of breast (post-mastectomy). Z51.0 covers radiation therapy, Z80.3 is family history, Z90.13 is acquired absence of breast, Z98.89 is other specified postprocedural states.
For a patient seen for encounter after poisoning by methanol, which combination of Chapter 20 and Chapter 21 codes is correct?
T51.1X1D and Z04.9
T51.1X1A and Z51.89
T51.1X2A and Z91.1
T51.0X1A and Z50.89
T51.1X1A is initial encounter for methanol poisoning; Z51.89 is encounter for other specified aftercare (e.g., detoxification). T51.1X2A is subsequent encounter, Z91.1 is personal history of self-harm, T51.0X1A is ethanol poisoning, and Z04.9 is examination after unspecified injury.
0
{"name":"What is the code range for ICD-10 Chapter 21 (Factors influencing health status and contact with health services)?", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"What is the code range for ICD-10 Chapter 21 (Factors influencing health status and contact with health services)?, Which of the following is a typical reason for encounter coded in Chapter 21?, What Z code would you use for immunization against influenza?","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}

Study Outcomes

  1. Identify Chapter 21 Encounter Reasons -

    Understand what reasons for healthcare encounters are included in Chapter 21, including general medical examinations and symptom-based visits.

  2. Differentiate Chapter 20 and 21 Codes -

    Analyze the key distinctions between ICD-10 Chapter 20 external cause codes and Chapter 21 encounter reason codes to improve coding accuracy.

  3. Apply Correct ICD-10 Codes -

    Use knowledge from the quiz to select appropriate ICD-10 codes for various healthcare encounters and external causes.

  4. Analyze Patient Encounter Scenarios -

    Evaluate clinical vignettes to determine the most accurate reason for encounter code based on Chapter 21 guidelines.

  5. Enhance Coding Proficiency -

    Build confidence and speed in assigning ICD-10 codes for Chapters 20 and 21 through targeted quiz practice.

Cheat Sheet

  1. Chapter 20 vs. Chapter 21 Distinction -

    Chapter 20 (V00 - Y99) covers external causes of injury and poisoning, while Chapter 21 (Z00 - Z99) captures what reasons for healthcare encounters are included in Chapter 21 - non-disease factors that bring patients in. Remember: "V for Vehicle, Z for Visit." Using this mnemonic helps you ace the ICD-10 Chapter 20 quiz versus the ICD coding Chapter 21 test.

  2. Preventive and Screening Encounters (Z00 - Z13) -

    Codes Z00 - Z13 identify routine exams and screenings, such as annual physicals (Z00.0) or Pap smears (Z01.41). A handy memory phrase is "Pre-Screen = Z-scene," linking screening studies to Z-codes in ICd-10 Chapter 21 trivia questions. These codes boost preventive care metrics in public health research (CDC ICD-10 Guidelines).

  3. Vaccination and Prophylactic Encounters (Z23) -

    Use Z23 to record encounters for immunizations, like Z23.0 for a flu shot or Z23.1 for pneumococcal vaccine. Think "Z-Shot" to recall vaccines in the healthcare encounter reasons quiz. Official WHO coding directives emphasize accurate vaccine documentation for population health monitoring.

  4. Aftercare, Follow-Up & Rehabilitation (Z40 - Z54) -

    Codes Z40 - Z54 cover postoperative aftercare (Z48.0) and long-term rehabilitation (Z50.9). Mnemonic: "Z-After" = aftercare related visits. Accurate use of these codes enhances continuity of care and is critical for facility reimbursement studies (American Health Information Management Association).

  5. Social, Economic & Psychosocial Factors (Z55 - Z65) -

    Chapters Z55 - Z65 capture nonmedical determinants like education issues (Z55.0) and housing problems (Z59.0). Remember the phrase "Z-Context" to log social influences on health. Studies in the Journal of Public Health underscore the importance of these codes for holistic care planning.

Make a Quiz (FREE) Copy & Edit This Quiz Create a Quiz with AI

Diseases & Conditions Quizzes

Powered by: Quiz Maker