T43.2 is the authoritative medical code for Poisoning by, adverse effect of and underdosing of other and unspecified antidepressants. This classification is used in medical billing and clinical recording to specify the clinical criteria for poisoning by, adverse effect of and underdosing of other and unspecified antidepressants (ICD-10-CM T43.2), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Poisoning by, adverse effect of and underdosing of other and unspecified antidepressants is a non-billable ICD-10-CM category code T43.2. A more specific billable subcode must be selected for claims submission. Includes: adverse effect of correct substance properly administered; poisoning by overdose of substance; poisoning by wrong substance given or taken in error; underdosing by (inadvertently) deliberately taking less substance than prescribed or instructed. Excludes1 (not coded here): toxic reaction to local anesthesia in pregnancy O29.3-. Excludes2 (not included here): appetite depressants T50.5-; barbiturates T42.3-; benzodiazepines T42.4-; drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-); methaqualone T42.6-; psychodysleptics hallucinogens; abuse and dependence of psychoactive substances F10-F19; abuse of non-dependence-producing substances F55.-; immunodeficiency due to drugs D84.821; drug reaction and poisoning affecting newborn P00-P96; pathological drug intoxication inebriation F10-F19. Code first: , for adverse effects, the nature of the adverse effect, such as:; adverse effect NOS T88.7; aspirin gastritis K29.-; blood disorders D56-D76; contact dermatitis L23-L25; dermatitis due to substances taken internally L27.-; nephropathy N14.0-N14.2. Use additional code: code(s) to specify:; manifestations of poisoning; underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9); underdosing of medication regimen (Z91.12-, Z91.13-). 7th character: The appropriate 7th character is to be added to each code from category T43.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T43.2 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) deliberately taking less substance than prescribed or instructed
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- toxic reaction to local anesthesia in pregnancy O29.3-
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- appetite depressants T50.5-
- barbiturates T42.3-
- benzodiazepines T42.4-
- drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
- methaqualone T42.6-
- psychodysleptics hallucinogens
- abuse and dependence of psychoactive substances F10-F19
- abuse of non-dependence-producing substances F55.-
- immunodeficiency due to drugs D84.821
- drug reaction and poisoning affecting newborn P00-P96
- pathological drug intoxication inebriation F10-F19
Code First
Underlying conditions that must be sequenced before this code.
- , for adverse effects, the nature of the adverse effect, such as:
- adverse effect NOS T88.7
- aspirin gastritis K29.-
- blood disorders D56-D76
- contact dermatitis L23-L25
- dermatitis due to substances taken internally L27.-
- nephropathy N14.0-N14.2
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
Frequently Asked Questions (FAQ) & Clinical Guidance
Can T43.2 be billed directly?
No. T43.2 (Poisoning by, adverse effect of and underdosing of other and unspecified antidepressants) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T43.2 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T43.
What can't be coded together with T43.2?
Per official ICD-10-CM Excludes1 instructions, T43.2 must not be reported together with: toxic reaction to local anesthesia in pregnancy (O29.3-).
Can T43.2 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, T43.2 and the following are not considered part of each other and may both be reported when both conditions are present: appetite depressants (T50.5-); barbiturates (T42.3-); benzodiazepines (T42.4-); drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-).
Does T43.2 need to be sequenced after another code?
Yes. Code first: , for adverse effects, the nature of the adverse effect, such as:; adverse effect NOS (T88.7); aspirin gastritis (K29.-); blood disorders (D56-D76).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T43.2 in its code family, with their registry titles.
- T43.201 — Poisoning by unspecified antidepressants, accidental (unintentional)
- T43.201A — Poisoning by unspecified antidepressants, accidental (unintentional), initial encounter
- T43.201D — Poisoning by unspecified antidepressants, accidental (unintentional), subsequent encounter
- T43.201S — Poisoning by unspecified antidepressants, accidental (unintentional), sequela
- T43.202 — Poisoning by unspecified antidepressants, intentional self-harm
- T43.202A — Poisoning by unspecified antidepressants, intentional self-harm, initial encounter
- T43.202D — Poisoning by unspecified antidepressants, intentional self-harm, subsequent encounter
- T43.202S — Poisoning by unspecified antidepressants, intentional self-harm, sequela
- T43.203 — Poisoning by unspecified antidepressants, assault
- T43.203A — Poisoning by unspecified antidepressants, assault, initial encounter
View all 40 codes in the T43.201 family