T43.026D ICD-10-CM Code: Underdosing of tetracyclic antidepressants, subsequent encounter
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
T43.026DUnderdosing of tetracyclic antidepressants, subsequent encounter
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where T43.026D sits
- 1
Chapter 19
Injury, poisoning and certain other consequences of external causes (S00-T88)
- 2
Section
Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
- 3
Category T43
Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
- 4
Subcategory T43.026
Underdosing of tetracyclic antidepressants
- 5
Code T43.026D
Underdosing of tetracyclic antidepressants, subsequent encounter
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for T43.026D.
Code first
No “code first” instruction is listed for T43.026D.
Use additional code
No “use additional code” instruction is listed for T43.026D.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for T43.026D.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for T43.026D.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code T43.026D mean?
T43.026D is the FY 2027 U.S. ICD-10-CM code for “Underdosing of tetracyclic antidepressants, subsequent encounter.”
Is T43.026D a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, T43.026D has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is T43.026D located in ICD-10-CM?
T43.026D is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) (T36–T50), under category T43, Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified and subcategory T43.026, Underdosing of tetracyclic antidepressants.
What coding notes are listed for T43.026D?
No inclusion terms are listed for T43.026D in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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