ICDcodes.org
FY2027

T65.9 — Toxic effect of unspecified substance

Not billable

Is T65.9 billable?

No — T65.9 is a non-billable header code. T65.9 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 12 billable codes beneath T65.9.

Billable codes under this header

T65.9 at a glance

CodeT65.9
DescriptionToxic effect of unspecified substance
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Excludes1 — never code together — inherited from T51-T65

The conditions below can never be reported together with T65.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • contact with and (suspected) exposure to toxic substances (Z77.-)

Use additional code — inherited from Chapter 19

Report an additional code alongside T65.9 to fully describe the condition. T65.9 is sequenced first.

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

Use additional code — inherited from T51-T65

Report an additional code alongside T65.9 to fully describe the condition. T65.9 is sequenced first.

  • code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
  • personal history of foreign body fully removed (Z87.821)
  • to identify any retained foreign body, if applicable (Z18.-)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T65.9, but a patient may have both at the same time. When documentation supports it, T65.9 and the excluded code may both be reported.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

What codes fall under T65.9? (4)

How long has T65.9 existed?

T65.9 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 T65 family? (8)