T45.5 — Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
Is T45.5 billable?
No — T45.5 is a non-billable header code. T45.5 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 36 billable codes beneath T45.5.
Billable codes under this header
- T45.511APoisoning by anticoagulants, accidental (unintentional), initial encounter
- T45.511DPoisoning by anticoagulants, accidental (unintentional), subsequent encounter
- T45.511SPoisoning by anticoagulants, accidental (unintentional), sequela
- T45.512APoisoning by anticoagulants, intentional self-harm, initial encounter
- T45.512DPoisoning by anticoagulants, intentional self-harm, subsequent encounter
- T45.512SPoisoning by anticoagulants, intentional self-harm, sequela
- T45.513APoisoning by anticoagulants, assault, initial encounter
- T45.513DPoisoning by anticoagulants, assault, subsequent encounter
- T45.513SPoisoning by anticoagulants, assault, sequela
- T45.514APoisoning by anticoagulants, undetermined, initial encounter
- T45.514DPoisoning by anticoagulants, undetermined, subsequent encounter
- T45.514SPoisoning by anticoagulants, undetermined, sequela
- T45.515AAdverse effect of anticoagulants, initial encounter
- T45.515DAdverse effect of anticoagulants, subsequent encounter
- T45.515SAdverse effect of anticoagulants, sequela
- T45.516AUnderdosing of anticoagulants, initial encounter
- T45.516DUnderdosing of anticoagulants, subsequent encounter
- T45.516SUnderdosing of anticoagulants, sequela
- T45.521APoisoning by antithrombotic drugs, accidental (unintentional), initial encounter
- T45.521DPoisoning by antithrombotic drugs, accidental (unintentional), subsequent encounter
- T45.521SPoisoning by antithrombotic drugs, accidental (unintentional), sequela
- T45.522APoisoning by antithrombotic drugs, intentional self-harm, initial encounter
- T45.522DPoisoning by antithrombotic drugs, intentional self-harm, subsequent encounter
- T45.522SPoisoning by antithrombotic drugs, intentional self-harm, sequela
- T45.523APoisoning by antithrombotic drugs, assault, initial encounter
- T45.523DPoisoning by antithrombotic drugs, assault, subsequent encounter
- T45.523SPoisoning by antithrombotic drugs, assault, sequela
- T45.524APoisoning by antithrombotic drugs, undetermined, initial encounter
- T45.524DPoisoning by antithrombotic drugs, undetermined, subsequent encounter
- T45.524SPoisoning by antithrombotic drugs, undetermined, sequela
- T45.525AAdverse effect of antithrombotic drugs, initial encounter
- T45.525DAdverse effect of antithrombotic drugs, subsequent encounter
- T45.525SAdverse effect of antithrombotic drugs, sequela
- T45.526AUnderdosing of antithrombotic drugs, initial encounter
- T45.526DUnderdosing of antithrombotic drugs, subsequent encounter
- T45.526SUnderdosing of antithrombotic drugs, sequela
T45.5 at a glance
| Code | T45.5 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs |
| 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 T45.5 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 T45.5. T45.5 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T45.5 to fully describe the condition. T45.5 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 T45.5 to fully describe the condition. T45.5 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T45.5, but a patient may have both at the same time. When documentation supports it, T45.5 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T45.5, but a patient may have both at the same time. When documentation supports it, T45.5 and the excluded code may both be reported.
What codes fall under T45.5? (2)
How long has T45.5 existed?
T45.5 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
- T45.6Poisoning 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