DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T68 Hypothermia

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

T68 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.

Index → code

  • Hypothermia (accidental) → T68
  • Subnormal, subnormalitytemperature (accidental) → T68
  • Hypothermia (accidental)low environmental temperature → T68

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T66-T78 Other and unspecified effects of external causes (T66-T78)
  3. T68 Hypothermia
Billable codes
3
Subdivisions
0
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
3

Codes in T68

  1. T68.XXXA
    Hypothermia, initial encounter
    Billable
  2. T68.XXXD
    Hypothermia, subsequent encounter
    BillableExempt
  3. T68.XXXS
    Hypothermia, 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 T68

Inclusion terms

  • Accidental hypothermia
  • Hypothermia NOS

Excludes1

  • hypothermia following anesthesia (T88.51) T88.51
  • hypothermia not associated with low environmental temperature (R68.0) R68.0
  • hypothermia of newborn (P80.-) P80

Excludes2

Use additional code

  • code to identify source of exposure:
  • Exposure to excessive cold of man-made origin (W93) W93
  • Exposure to excessive cold of natural origin (X31) X31

Notes that also apply

Block T66-T78 instructions (Code also 6): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for T68 defined here

The appropriate 7th character is to be added to code T68

7th characters for T68
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.

Index entries

  • Hypothermia (accidental) → T68
  • Hypothermia (accidental)low environmental temperature → T68
  • Subnormal, subnormalitytemperature (accidental) → T68

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy