COBGC Obstetric Coding Basics 2 — Questions and Answers
Question 1: According to ICD-10-CM guidelines, the first trimester is defined as:
- Weeks 1 through 12
- Less than 14 weeks 0 days (Correct answer)
- Up to 13 weeks 6 days
- Fewer than 12 completed weeks
Correct answer: Less than 14 weeks 0 days
ICD-10-CM defines the first trimester as less than 14 weeks 0 days from the first day of the last menstrual period.
Question 2: Which ICD-10-CM chapter contains codes for pregnancy, childbirth, and the puerperium?
- Chapter 11
- Chapter 14
- Chapter 15 (Correct answer)
- Chapter 16
Correct answer: Chapter 15
ICD-10-CM Chapter 15 (codes O00–O9A) covers conditions related to pregnancy, childbirth, and the puerperium.
Question 3: The puerperium is defined in ICD-10-CM as the period:
- From conception through delivery
- From delivery through 28 days postpartum
- From delivery through 6 weeks postpartum (Correct answer)
- From delivery through 3 months postpartum
Correct answer: From delivery through 6 weeks postpartum
The puerperium (postpartum period) is defined as the period from delivery through 6 weeks (42 days) after delivery.
Question 4: In ICD-10-CM, the trimester assigned to an obstetric complication is based on:
- The estimated due date
- The gestational age at the time of the encounter (Correct answer)
- The gestational age at onset of the complication
- The date of the last menstrual period
Correct answer: The gestational age at the time of the encounter
The trimester is assigned based on the number of weeks of gestation at the time of the current encounter, not the onset of the complication.
Question 5: Which ICD-10-CM code category is used for supervision of normal pregnancies during antepartum visits with no complications?
- O09
- O26
- Z33
- Z34 (Correct answer)
Correct answer: Z34
Category Z34 (Encounter for supervision of normal pregnancy) is used for routine antepartum visits when no complications are present.
Question 6: In ICD-10-CM, what does the 7th character represent in multiple gestation obstetric codes?
- The trimester
- The episode of care
- The specific fetus affected (Correct answer)
- Whether delivery was vaginal or cesarean
Correct answer: The specific fetus affected
The 7th character in multiple gestation codes identifies which specific fetus is affected by the complication (e.g., 1 = fetus 1, 2 = fetus 2).
Question 7: Which category of codes must be assigned as an additional code to every delivery encounter to indicate the number of livebirths and stillbirths?
- O80
- Z34
- Z37 (Correct answer)
- Z38
Correct answer: Z37
A code from category Z37 (Outcome of delivery) must always be assigned on the maternal record for each delivery encounter.
COBGC Obstetric Coding Basics 2
According to ICD-10-CM guidelines, the first trimester is defined as: