T45.9 — Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent
Is T45.9 billable?
No — T45.9 is a non-billable header code. T45.9 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 18 billable codes beneath T45.9.
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
T45.9 at a glance
| Code | T45.9 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent |
| 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 T45.9 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 T45.9. T45.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T45.9 to fully describe the condition. T45.9 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 T45.9 to fully describe the condition. T45.9 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T45.9, but a patient may have both at the same time. When documentation supports it, T45.9 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T45.9, but a patient may have both at the same time. When documentation supports it, T45.9 and the excluded code may both be reported.
What codes fall under T45.9? (6)
- T45.91Poisoning by unspecified primarily systemic and hematological agent, accidental (unintentional)not billable
- T45.92Poisoning by unspecified primarily systemic and hematological agent, intentional self-harmnot billable
- T45.93Poisoning by unspecified primarily systemic and hematological agent, assaultnot billable
- T45.94Poisoning by unspecified primarily systemic and hematological agent, undeterminednot billable
- T45.95Adverse effect of unspecified primarily systemic and hematological agentnot billable
- T45.96Underdosing of unspecified primarily systemic and hematological agentnot billable
How long has T45.9 existed?
T45.9 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.
What other codes are in the T45 family? (10)
- 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.APoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugsnot billable