T41.46 ICD-10-CM Code: Underdosing of unspecified anesthetics
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T41.46 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.
- benzodiazepines (T42.4-)
- cocaine (T40.5-)
- complications of anesthesia during pregnancy (O29.-)
- complications of anesthesia during labor and delivery (O74.-)
- complications of anesthesia during the puerperium (O89.-)
- opioids (T40.0-T40.2-)
- 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.
- 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.
- 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
Supplementary codes the tabular list directs you to add.
- Use additional 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 T41.46 be billed directly?
No. T41.46 (Underdosing of unspecified anesthetics) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T41.46 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T41.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T41.46 in its code family, with their registry titles.
- T41.44XS — Poisoning by unspecified anesthetic, undetermined, sequela
- T41.45 — Adverse effect of unspecified anesthetic
- T41.45XA — Adverse effect of unspecified anesthetic, initial encounter
- T41.45XD — Adverse effect of unspecified anesthetic, subsequent encounter
- T41.45XS — Adverse effect of unspecified anesthetic, sequela
- T41.46XA — Underdosing of unspecified anesthetics, initial encounter
- T41.46XD — Underdosing of unspecified anesthetics, subsequent encounter
- T41.46XS — Underdosing of unspecified anesthetics, sequela
- T41.5 — Poisoning by, adverse effect of and underdosing of therapeutic gases
- T41.5X — Poisoning by, adverse effect of and underdosing of therapeutic gases
Associated Substances (1)
Substances from the official ICD-10-CM Table of Drugs and Chemicals that map to this code.
- Anesthetic NEC