T46.5 — Poisoning by, adverse effect of and underdosing of other antihypertensive drugs
Is T46.5 billable?
No — T46.5 is a non-billable header code. T46.5 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 18 billable codes beneath T46.5.
Billable codes under this header
- T46.5X1APoisoning by other antihypertensive drugs, accidental (unintentional), initial encounter
- T46.5X1DPoisoning by other antihypertensive drugs, accidental (unintentional), subsequent encounter
- T46.5X1SPoisoning by other antihypertensive drugs, accidental (unintentional), sequela
- T46.5X2APoisoning by other antihypertensive drugs, intentional self-harm, initial encounter
- T46.5X2DPoisoning by other antihypertensive drugs, intentional self-harm, subsequent encounter
- T46.5X2SPoisoning by other antihypertensive drugs, intentional self-harm, sequela
- T46.5X3APoisoning by other antihypertensive drugs, assault, initial encounter
- T46.5X3DPoisoning by other antihypertensive drugs, assault, subsequent encounter
- T46.5X3SPoisoning by other antihypertensive drugs, assault, sequela
- T46.5X4APoisoning by other antihypertensive drugs, undetermined, initial encounter
- T46.5X4DPoisoning by other antihypertensive drugs, undetermined, subsequent encounter
- T46.5X4SPoisoning by other antihypertensive drugs, undetermined, sequela
- T46.5X5AAdverse effect of other antihypertensive drugs, initial encounter
- T46.5X5DAdverse effect of other antihypertensive drugs, subsequent encounter
- T46.5X5SAdverse effect of other antihypertensive drugs, sequela
- T46.5X6AUnderdosing of other antihypertensive drugs, initial encounter
- T46.5X6DUnderdosing of other antihypertensive drugs, subsequent encounter
- T46.5X6SUnderdosing of other antihypertensive drugs, sequela
T46.5 at a glance
| Code | T46.5 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of other antihypertensive drugs |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here
The conditions below are not part of T46.5, but a patient may have both at the same time. When documentation supports it, T46.5 and the excluded code may both be reported.
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T46.5 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-)
Excludes1 — never code together — inherited from T46
The conditions below can never be reported together with T46.5 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- poisoning by, adverse effect of and underdosing of metaraminol (T44.4)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T46.5. T46.5 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T46.5 to fully describe the condition. T46.5 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 T46.5 to fully describe the condition. T46.5 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T46.5, but a patient may have both at the same time. When documentation supports it, T46.5 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T46.5, but a patient may have both at the same time. When documentation supports it, T46.5 and the excluded code may both be reported.
What codes fall under T46.5? (1)
How long has T46.5 existed?
T46.5 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 T46 family? (9)
- T46.0Poisoning by, adverse effect of and underdosing of cardiac-stimulant glycosides and drugs of similar actionnot billable
- T46.1Poisoning by, adverse effect of and underdosing of calcium-channel blockersnot billable
- T46.2Poisoning by, adverse effect of and underdosing of other antidysrhythmic drugs, not elsewhere classifiednot billable
- T46.3Poisoning by, adverse effect of and underdosing of coronary vasodilatorsnot billable
- T46.4Poisoning by, adverse effect of and underdosing of angiotensin-converting-enzyme inhibitorsnot billable
- T46.6Poisoning by, adverse effect of and underdosing of antihyperlipidemic and antiarteriosclerotic drugsnot billable
- T46.7Poisoning by, adverse effect of and underdosing of peripheral vasodilatorsnot billable
- T46.8Poisoning by, adverse effect of and underdosing of antivaricose drugs, including sclerosing agentsnot billable
- T46.9Poisoning by, adverse effect of and underdosing of other and unspecified agents primarily affecting the cardiovascular systemnot billable