CPCA ICD-10-CM Coding for Skin 5 — Questions and Answers
Question 1: When coding a diabetic foot ulcer, what is the correct sequencing order?
- Diabetes code first, then the ulcer site code (Correct answer)
- Ulcer site code first, then the diabetes code
- Only code the diabetes, not the ulcer
- Only code the ulcer, not the diabetes
Correct answer: Diabetes code first, then the ulcer site code
ICD-10-CM instructs coders to sequence the diabetic complication code (e.g., E11.621) first, followed by the ulcer site code (L97.-).
Question 2: What additional code must be reported with a non-pressure ulcer of the lower limb (L97) when gangrene is also present?
- I96 (Correct answer)
- R02
- L98.4
- E11.52
Correct answer: I96
I96 (gangrene, not elsewhere classified) must be reported additionally when gangrene accompanies a non-pressure lower limb ulcer.
Question 3: A patient has a sequela (scar) from a previously healed burn of the left forearm. Which 7th character is used?
- S (Correct answer)
- A
- D
- Q
Correct answer: S
The 7th character 'S' denotes sequela, used when coding late effects or complications of a healed burn.
Question 4: Which ICD-10-CM code is used for pilonidal cyst without abscess?
- L05.91 (Correct answer)
- L05.01
- L05.92
- L05.02
Correct answer: L05.91
L05.91 is the code for pilonidal cyst without abscess; L05.01 would indicate a pilonidal cyst with abscess.
Question 5: When a burn involves multiple sites of different degrees, how should coding be approached?
- Code each site separately, reflecting the highest degree at each site (Correct answer)
- Code only the most severe burn
- Use a single combination code for all sites
- Code only the largest burn area
Correct answer: Code each site separately, reflecting the highest degree at each site
Each burn site is coded separately using the code that reflects the highest degree of burn at that specific site.
Question 6: A patient has psoriatic arthropathy with associated psoriasis. What code should be sequenced first?
- L40.50 (Correct answer)
- M07.60
- L40.9
- M07.00
Correct answer: L40.50
L40.50 (psoriatic arthropathy, unspecified) is used as a combination code that captures both psoriasis and arthropathy.
Question 7: Which code represents dermatitis due to ingested food?
- L27.2 (Correct answer)
- L23.6
- L24.6
- L30.9
Correct answer: L27.2
L27.2 is the code for dermatitis due to ingested food, classifying it as a reaction to an internally ingested substance.
CPCA ICD-10-CM Coding for Skin 5
When coding a diabetic foot ulcer, what is the correct sequencing order?