T45 — Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
Not billable
Is T45 billable?
No — T45 is a non-billable header code. T45 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath T45.
Billable codes under this header
- T45.91XAPoisoning by unspecified primarily systemic and hematological agent, accidental (unintentional), initial encounter
- T45.91XDPoisoning by unspecified primarily systemic and hematological agent, accidental (unintentional), subsequent encounter
- T45.91XSPoisoning by unspecified primarily systemic and hematological agent, accidental (unintentional), sequela
- T45.92XAPoisoning by unspecified primarily systemic and hematological agent, intentional self-harm, initial encounter
- T45.92XDPoisoning by unspecified primarily systemic and hematological agent, intentional self-harm, subsequent encounter
- T45.92XSPoisoning by unspecified primarily systemic and hematological agent, intentional self-harm, sequela
- T45.93XAPoisoning by unspecified primarily systemic and hematological agent, assault, initial encounter
- T45.93XDPoisoning by unspecified primarily systemic and hematological agent, assault, subsequent encounter
- T45.93XSPoisoning by unspecified primarily systemic and hematological agent, assault, sequela
- T45.94XAPoisoning by unspecified primarily systemic and hematological agent, undetermined, initial encounter
- T45.94XDPoisoning by unspecified primarily systemic and hematological agent, undetermined, subsequent encounter
- T45.94XSPoisoning by unspecified primarily systemic and hematological agent, undetermined, sequela
- T45.95XAAdverse effect of unspecified primarily systemic and hematological agent, initial encounter
- T45.95XDAdverse effect of unspecified primarily systemic and hematological agent, subsequent encounter
- T45.95XSAdverse effect of unspecified primarily systemic and hematological agent, sequela
- T45.96XAUnderdosing of unspecified primarily systemic and hematological agent, initial encounter
- T45.96XDUnderdosing of unspecified primarily systemic and hematological agent, subsequent encounter
- T45.96XSUnderdosing of unspecified primarily systemic and hematological agent, sequela
- T45.0X1APoisoning by antiallergic and antiemetic drugs, accidental (unintentional), initial encounter
- T45.0X1DPoisoning by antiallergic and antiemetic drugs, accidental (unintentional), subsequent encounter
- T45.0X1SPoisoning by antiallergic and antiemetic drugs, accidental (unintentional), sequela
- T45.0X2APoisoning by antiallergic and antiemetic drugs, intentional self-harm, initial encounter
- T45.0X2DPoisoning by antiallergic and antiemetic drugs, intentional self-harm, subsequent encounter
- T45.0X2SPoisoning by antiallergic and antiemetic drugs, intentional self-harm, sequela
- T45.0X3APoisoning by antiallergic and antiemetic drugs, assault, initial encounter
- T45.0X3DPoisoning by antiallergic and antiemetic drugs, assault, subsequent encounter
- T45.0X3SPoisoning by antiallergic and antiemetic drugs, assault, sequela
- T45.0X4APoisoning by antiallergic and antiemetic drugs, undetermined, initial encounter
- T45.0X4DPoisoning by antiallergic and antiemetic drugs, undetermined, subsequent encounter
- T45.0X4SPoisoning by antiallergic and antiemetic drugs, undetermined, sequela
- T45.0X5AAdverse effect of antiallergic and antiemetic drugs, initial encounter
- T45.0X5DAdverse effect of antiallergic and antiemetic drugs, subsequent encounter
- T45.0X5SAdverse effect of antiallergic and antiemetic drugs, sequela
- T45.0X6AUnderdosing of antiallergic and antiemetic drugs, initial encounter
- T45.0X6DUnderdosing of antiallergic and antiemetic drugs, subsequent encounter
- T45.0X6SUnderdosing of antiallergic and antiemetic drugs, sequela
- T45.1X1APoisoning by antineoplastic and immunosuppressive drugs, accidental (unintentional), initial encounter
- T45.1X1DPoisoning by antineoplastic and immunosuppressive drugs, accidental (unintentional), subsequent encounter
- T45.1X1SPoisoning by antineoplastic and immunosuppressive drugs, accidental (unintentional), sequela
- T45.1X2APoisoning by antineoplastic and immunosuppressive drugs, intentional self-harm, initial encounter
- T45.1X2DPoisoning by antineoplastic and immunosuppressive drugs, intentional self-harm, subsequent encounter
- T45.1X2SPoisoning by antineoplastic and immunosuppressive drugs, intentional self-harm, sequela
- T45.1X3APoisoning by antineoplastic and immunosuppressive drugs, assault, initial encounter
- T45.1X3DPoisoning by antineoplastic and immunosuppressive drugs, assault, subsequent encounter
- T45.1X3SPoisoning by antineoplastic and immunosuppressive drugs, assault, sequela
- T45.1X4APoisoning by antineoplastic and immunosuppressive drugs, undetermined, initial encounter
- T45.1X4DPoisoning by antineoplastic and immunosuppressive drugs, undetermined, subsequent encounter
- T45.1X4SPoisoning by antineoplastic and immunosuppressive drugs, undetermined, sequela
- T45.1X5AAdverse effect of antineoplastic and immunosuppressive drugs, initial encounter
- T45.1X5DAdverse effect of antineoplastic and immunosuppressive drugs, subsequent encounter
- T45.1X5SAdverse effect of antineoplastic and immunosuppressive drugs, sequela
- T45.1X6AUnderdosing of antineoplastic and immunosuppressive drugs, initial encounter
- T45.1X6DUnderdosing of antineoplastic and immunosuppressive drugs, subsequent encounter
- T45.1X6SUnderdosing of antineoplastic and immunosuppressive drugs, sequela
- T45.2X1APoisoning by vitamins, accidental (unintentional), initial encounter
- T45.2X1DPoisoning by vitamins, accidental (unintentional), subsequent encounter
- T45.2X1SPoisoning by vitamins, accidental (unintentional), sequela
- T45.2X2APoisoning by vitamins, intentional self-harm, initial encounter
- T45.2X2DPoisoning by vitamins, intentional self-harm, subsequent encounter
- T45.2X2SPoisoning by vitamins, intentional self-harm, sequela
T45 at a glance
| Code | T45 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T45 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T45. T45 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T45 to fully describe the condition. T45 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T45 to fully describe the condition. T45 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T45, but a patient may have both at the same time. When documentation supports it, T45 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T45, but a patient may have both at the same time. When documentation supports it, T45 and the excluded code may both be reported.
What codes fall under T45? (11)
- T45.0Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugsnot billable
- T45.1Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugsnot billable
- T45.2Poisoning by, adverse effect of and underdosing of vitaminsnot billable
- T45.3Poisoning by, adverse effect of and underdosing of enzymesnot billable
- T45.4Poisoning by, adverse effect of and underdosing of iron and its compoundsnot billable
- T45.5Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugsnot billable
- T45.6Poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugsnot billable
- T45.7Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulantsnot billable
- T45.8Poisoning by, adverse effect of and underdosing of other primarily systemic and hematological agentsnot billable
- T45.9Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agentnot billable
- T45.APoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugsnot billable
How long has T45 existed?
T45 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.