Category · FY2027
W99 Exposure to other man-made environmental factors
- Header · not billable
- Codes take a 7th character
W99 is not billable. The category heads 3 billable codes in FY2027. Its codes take a 7th character, so none is complete with fewer than 7 characters.
Where it sits
- Chapter 20 External causes of morbidity (V00-Y99)
- W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99)
- W99 Exposure to other man-made environmental factors
- Billable codes
- 3
- Subdivisions
- 0
- CC / MCC codes
- 0 / 0
- HCC V28 codes
- 0
- New FY2027
- 0
- Index entries
- 0
Codes in W99
- W99.XXXAExposure to other man-made environmental factors, initial encounterBillableExempt
- W99.XXXDExposure to other man-made environmental factors, subsequent encounterBillableExempt
- W99.XXXSExposure to other man-made environmental factors, sequelaBillableExempt
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 W85-W99 instructions (Excludes1 8): printed on the block page.
Chapter 20 instructions (Notes 1): printed on the chapter 20 page.
7th characters
7th characters for W99 defined here
The appropriate 7th character is to be added to code W99
| 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.