Category · FY2027
W42 Exposure to noise
- Header · not billable
- Codes take a 7th character
W42 is not billable. The category heads 6 billable codes in FY2027, grouped under 2 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.
Where it sits
- Billable codes
- 6
- Subdivisions
- 2
- CC / MCC codes
- 0 / 0
- HCC V28 codes
- 0
- New FY2027
- 0
- Index entries
- 0
Codes in W42
- W42.0Exposure to supersonic waves +7th: A D SNeeds 7th characterExempt
- W42.9Exposure to other noise +7th: A D SNeeds 7th characterExempt: 2 of 3 7th characters
Inclusion terms 1
Inclusion terms
- Exposure to sound waves NOS
Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.
Instructions
Notes that also apply
Block W20-W49 instructions (Excludes1 4): printed on the block page.
Chapter 20 instructions (Notes 1): printed on the chapter 20 page.
7th characters
7th characters for W42 defined here
The appropriate 7th character is to be added to each code from category W42
| 7th | Meaning (NCHS) |
|---|---|
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.