T42: Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs

Instructional note

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code

Source: S00-T88 (chapter, inherited).

Instructional note

code to identify any retained foreign body, if applicable (Z18.-)

Source: S00-T88 (chapter, inherited).

Excludes2

birth trauma (P10-P15)

Source: S00-T88 (chapter, inherited).

Excludes2

obstetric trauma (O70-O71)

Source: S00-T88 (chapter, inherited).

Instructional note

The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Source: S00-T88 (chapter, inherited).

Includes

adverse effect of correct substance properly administered

Source: T36-T50 (section, inherited).

Includes

poisoning by overdose of substance

Source: T36-T50 (section, inherited).

Includes

poisoning by wrong substance given or taken in error

Source: T36-T50 (section, inherited).

Includes

underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed

Source: T36-T50 (section, inherited).

Code first

, for adverse effects, the nature of the adverse effect, such as:

Source: T36-T50 (section, inherited).

Code first

adverse effect NOS (T88.7)

Source: T36-T50 (section, inherited).

Code first

aspirin gastritis (K29.-)

Source: T36-T50 (section, inherited).

Code first

blood disorders (D56-D76)

Source: T36-T50 (section, inherited).

Code first

contact dermatitis (L23-L25)

Source: T36-T50 (section, inherited).

Code first

dermatitis due to substances taken internally (L27.-)

Source: T36-T50 (section, inherited).

Code first

nephropathy (N14.0-N14.2)

Source: T36-T50 (section, inherited).

Instructional note

The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.

Source: T36-T50 (section, inherited).

Instructional note

code(s) to specify:

Source: T36-T50 (section, inherited).

Instructional note

manifestations of poisoning

Source: T36-T50 (section, inherited).

Instructional note

underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)

Source: T36-T50 (section, inherited).

Instructional note

underdosing of medication regimen (Z91.12-, Z91.13-)

Source: T36-T50 (section, inherited).

Excludes1

toxic reaction to local anesthesia in pregnancy (O29.3-)

Source: T36-T50 (section, inherited).

Excludes2

abuse and dependence of psychoactive substances (F10-F19)

Source: T36-T50 (section, inherited).

Excludes2

abuse of non-dependence-producing substances (F55.-)

Source: T36-T50 (section, inherited).

Excludes2

immunodeficiency due to drugs (D84.821)

Source: T36-T50 (section, inherited).

Excludes2

drug reaction and poisoning affecting newborn (P00-P96)

Source: T36-T50 (section, inherited).

Excludes2

pathological drug intoxication (inebriation) (F10-F19)

Source: T36-T50 (section, inherited).

Excludes2

drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.--F19.-)

Source: T42 (category, direct).

Seventh-character instruction

The appropriate 7th character is to be added to each code from category T42

Source: T42 (category, direct).

Instructional note

initial encounter

Source: T42 (category, direct).

Instructional note

subsequent encounter

Source: T42 (category, direct).

Instructional note

sequela

Source: T42 (category, direct).

Seventh-character definitions

• A: initial encounter
• D: subsequent encounter
• S: sequela