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T45

Non-billable

Primarily systemic and hematological agents, NEC

Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

T36-T50

Child Codes

11

Coding Notes

Includes

Conditions included 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

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)
  • toxic reaction to local anesthesia in pregnancy (O29.3-)

Excludes 2

Conditions not included here, but the patient may have both

  • 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

The underlying condition 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

Additional codes that should follow this code

  • code to identify any retained foreign body, if applicable (Z18.-)
  • 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 Definitions

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Child Codes (11)

T45.0

Antiallergic and antiemetic drugs

T45.1

Antineoplastic and immunosuppressive drugs

T45.2

Poisoning by, adverse effect of and underdosing of vitamins

T45.3

Poisoning by, adverse effect of and underdosing of enzymes

T45.4

Iron and its compounds

T45.5

Anticoagulants and antithrombotic drugs

T45.6

Fibrinolysis-affecting drugs

T45.7

Anticoagulant antagonists, vitamin K and oth coagulants

T45.8

Primarily systemic and hematological agents

T45.9

Unsp primarily systemic and hematological agent

T45.A

Immune checkpoint inhibitors and immunostimulant drugs

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code T45?

ICD-10-CM code T45 represents "Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified". It is a non-billable header code — use a more specific child code for billing purposes.

Is T45 a billable code?

No, T45 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 11 child codes under T45.

What chapter is T45 in?

T45 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).

What codes cannot be used with T45?

T45 has Excludes1 notes indicating codes that cannot be used together with it, including: birth trauma (P10-P15); obstetric trauma (O70-O71); toxic reaction to local anesthesia in pregnancy (O29.3-).

What are the subcategories under T45?

T45 has 11 child codes, including: T45.0 (Antiallergic and antiemetic drugs), T45.1 (Antineoplastic and immunosuppressive drugs), T45.2 (Poisoning by, adverse effect of and underdosing of vitamins), T45.3 (Poisoning by, adverse effect of and underdosing of enzymes), and 7 more.

Are additional codes required with T45?

Yes, when using T45 you should also code: code to identify any retained foreign body, if applicable (Z18.-); 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-).

What are the UMLS CUIs for T45?

T45 is linked to 1 UMLS Concept Unique Identifier: C2879019. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.