T49

Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs

T49 is from the 2021 edition of ICD-10-CM, which is effective on October 1, 2020. T49 is the American ICD-10-CM version. Other international versions of the ICD-10 code of T49 may vary.

Non-Billable 2021 ICD-10-CM Diagnosis Code

Additional Details
This code comes under Chapter 19

Chapter 19 contains the following blocks:

  • S00-S09 Injuries to the head
  • S10-S19 Injuries to the neck
  • S20-S29 Injuries to the thorax
  • S30-S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
  • S40-S49 Injuries to the shoulder and upper arm
  • S50-S59 Injuries to the elbow and forearm
  • S60-S69 Injuries to the wrist, hand and fingers
  • S70-S79 Injuries to the hip and thigh
  • S80-S89 Injuries to the knee and lower leg
  • S90-S99 Injuries to the ankle and foot
  • T07 Injuries involving multiple body regions
  • T14 Injury of unspecified body region
  • T15-T19 Effects of foreign body entering through natural orifice
  • T20-T25 Burns and corrosions of external body surface, specified by site
  • T26-T28 Burns and corrosions confined to eye and internal organs
  • T30-T32 Burns and corrosions of multiple and unspecified body regions
  • T33-T34 Frostbite
  • T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
  • T51-T65 Toxic effects of substances chiefly nonmedicinal as to source
  • T66-T78 Other and unspecified effects of external causes
  • T79 Certain early complications of trauma
  • T80-T88 Complications of surgical and medical care, not elsewhere classified

Below is some additional information from Chapter 19

Injury, poisoning and certain other consequences of external causes (S00-T88)
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
Use additional code to identify any retained foreign body, if applicable (Z18.-)
Excludes1: birth trauma (P10-P15)
obstetric trauma (O70-O71).
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.

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