Category · FY2027
X31 Exposure to excessive natural cold
- Header · not billable
- Codes take a 7th character
X31 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)
- X30-X39 Exposure to forces of nature (X30-X39)
- X31 Exposure to excessive natural cold
- Billable codes
- 3
- Subdivisions
- 0
- CC / MCC codes
- 0 / 0
- HCC V28 codes
- 0
- New FY2027
- 0
- Index entries
- 0
Codes in X31
- X31.XXXAExposure to excessive natural cold, initial encounterBillableExempt
- X31.XXXDExposure to excessive natural cold, subsequent encounterBillableExempt
- X31.XXXSExposure to excessive natural cold, 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
At X31
Inclusion terms
- Excessive cold as the cause of chilblains NOS
- Excessive cold as the cause of immersion foot or hand
- Exposure to cold NOS
- Exposure to weather conditions
Notes that also apply
Chapter 20 instructions (Notes 1): printed on the chapter 20 page.
7th characters
7th characters for X31 defined here
The appropriate 7th character is to be added to code X31
| 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.