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ICD-10/T44.1X6

T44.1X6 ICD-10-CM Code: Underdosing of other parasympathomimetics [cholinergics]

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Underdosing of other parasympathomimetics [cholinergics] is a non-billable ICD-10-CM category code (T44.1X6). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for T44.1X6 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 generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

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-)

Change history

  • FY2020 — 2019-10-01
    Description revised
    Underdosing of other parasympathomimetics → Underdosing of other parasympathomimetics [cholinergics]
    FY2020 changes
  • FY2020 — 2019-10-01
    Short description revised
    Underdosing of other parasympathomimetics → Underdosing of other parasympathomimetics [cholinergics]
    FY2020 changes

Verify Before Coding

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of T44.1X6 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
  • T36-T50 — Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances [Hierarchy]
  • T44-T46 — Cardiovascular & Gastrointestinal [Hierarchy]

Drugs & chemicals (11)

  • Aceclidine — Aceclidine — Underdosing [Drug table]: “Aceclidine (Underdosing)”
  • Arecoline — Arecoline — Underdosing [Drug table]: “Arecoline (Underdosing)”
  • Benzpyrinium bromide — Benzpyrinium bromide — Underdosing [Drug table]: “Benzpyrinium bromide (Underdosing)”
  • Bethanechol — Bethanechol — Underdosing [Drug table]: “Bethanechol (Underdosing)”
  • Carbachol — Carbachol — Underdosing [Drug table]: “Carbachol (Underdosing)”
  • Carbamylcholine chloride — Carbamylcholine chloride — Underdosing [Drug table]: “Carbamylcholine chloride (Underdosing)”
  • CholinergicNEC (drug) — CholinergicNEC (drug) — Underdosing [Drug table]: “CholinergicNEC (drug) (Underdosing)”
  • Methacholine — Methacholine — Underdosing [Drug table]: “Methacholine (Underdosing)”
  • and 3 more

Nearest codes (40)

  • T44 — Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system [Sibling]
  • T44.1X1 — Poisoning by other parasympathomimetics [cholinergics], accidental (unintentional) [Sibling]
  • T44.1X1A — Poisoning by other parasympathomimetics [cholinergics], accidental (unintentional), initial encounter [Sibling]
  • T44.1X1D — Poisoning by other parasympathomimetics [cholinergics], accidental (unintentional), subsequent encounter [Sibling]
  • T44.1X1S — Poisoning by other parasympathomimetics [cholinergics], accidental (unintentional), sequela [Sibling]
  • T44.1X2 — Poisoning by other parasympathomimetics [cholinergics], intentional self-harm [Sibling]
  • T44.1X2A — Poisoning by other parasympathomimetics [cholinergics], intentional self-harm, initial encounter [Sibling]
  • T44.1X2D — Poisoning by other parasympathomimetics [cholinergics], intentional self-harm, subsequent encounter [Sibling]
  • and 32 more

Change history (2)

  • FY2020 — Description revised [Change history]
  • and 1 more

Frequently Asked Questions (FAQ) & Clinical Guidance

Can T44.1X6 be billed directly?

No. T44.1X6 (Underdosing of other parasympathomimetics [cholinergics]) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does T44.1X6 require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category T44.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T44.1X6 in its code family, with their registry titles.

  • T44.1X4S — Poisoning by other parasympathomimetics [cholinergics], undetermined, sequela
  • T44.1X5 — Adverse effect of other parasympathomimetics [cholinergics]
  • T44.1X5A — Adverse effect of other parasympathomimetics [cholinergics], initial encounter
  • T44.1X5D — Adverse effect of other parasympathomimetics [cholinergics], subsequent encounter
  • T44.1X5S — Adverse effect of other parasympathomimetics [cholinergics], sequela
  • T44.1X6A — Underdosing of other parasympathomimetics [cholinergics], initial encounter
  • T44.1X6D — Underdosing of other parasympathomimetics [cholinergics], subsequent encounter
  • T44.1X6S — Underdosing of other parasympathomimetics [cholinergics], sequela
  • T44.2 — Poisoning by, adverse effect of and underdosing of ganglionic blocking drugs
  • T44.2X — Poisoning by, adverse effect of and underdosing of ganglionic blocking drugs

View all codes in the T44 family

Associated Substances (11)

Substances from the official ICD-10-CM Table of Drugs and Chemicals that map to this code.

  • Aceclidine
  • Arecoline
  • Benzpyrinium bromide
  • Bethanechol
  • Carbachol
  • Carbamylcholine chloride
  • CholinergicNEC (drug)
  • Methacholine
  • Parasympathomimetic drug NEC
  • Pilocarpine
  • Pilocarpusextract (jaborandi)