DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

X30 Exposure to excessive natural heat

  • Header · not billable
  • Codes take a 7th character

X30 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.

Billable codes
3
Subdivisions
0
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in X30

  1. X30.XXXA
    Exposure to excessive natural heat, initial encounter
    BillableExempt
  2. X30.XXXD
    Exposure to excessive natural heat, subsequent encounter
    BillableExempt
  3. X30.XXXS
    Exposure to excessive natural heat, sequela
    BillableExempt

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 X30

Inclusion terms

  • Exposure to excessive heat as the cause of sunstroke
  • Exposure to heat NOS

Excludes1

  • excessive heat of man-made origin (W92) W92
  • exposure to man-made radiation (W89) W89
  • exposure to sunlight (X32) X32
  • exposure to tanning bed (W89) W89

Notes that also apply

Chapter 20 instructions (Notes 1): printed on the chapter 20 page.

7th characters

7th characters for X30 defined here

The appropriate 7th character is to be added to code X30

7th characters for X30
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

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.

Hierarchy