T65.82 — Toxic effect of harmful algae and algae toxins
Is T65.82 billable?
No — T65.82 is a non-billable header code. T65.82 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 T65.82.
Billable codes under this header
- T65.821AToxic effect of harmful algae and algae toxins, accidental (unintentional), initial encounter
- T65.821DToxic effect of harmful algae and algae toxins, accidental (unintentional), subsequent encounter
- T65.821SToxic effect of harmful algae and algae toxins, accidental (unintentional), sequela
- T65.822AToxic effect of harmful algae and algae toxins, intentional self-harm, initial encounter
- T65.822DToxic effect of harmful algae and algae toxins, intentional self-harm, subsequent encounter
- T65.822SToxic effect of harmful algae and algae toxins, intentional self-harm, sequela
- T65.823AToxic effect of harmful algae and algae toxins, assault, initial encounter
- T65.823DToxic effect of harmful algae and algae toxins, assault, subsequent encounter
- T65.823SToxic effect of harmful algae and algae toxins, assault, sequela
- T65.824AToxic effect of harmful algae and algae toxins, undetermined, initial encounter
- T65.824DToxic effect of harmful algae and algae toxins, undetermined, subsequent encounter
- T65.824SToxic effect of harmful algae and algae toxins, undetermined, sequela
T65.82 at a glance
| Code | T65.82 |
|---|---|
| Description | Toxic effect of harmful algae and algae toxins |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is T65.82 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to T65.82. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Red tide
- Poisoning › algae and toxins (acute)
Inclusion terms
Alternative wording in documentation that is classified to T65.82.
- Toxic effect of (harmful) algae bloom NOS
- Toxic effect of blue-green algae bloom
- Toxic effect of brown tide
- Toxic effect of cyanobacteria bloom
- Toxic effect of Florida red tide
- Toxic effect of pfiesteria piscicida
- Toxic effect of red tide
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T65.82 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 T65.82 to fully describe the condition. T65.82 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 T65.82 to fully describe the condition. T65.82 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T65.82, but a patient may have both at the same time. When documentation supports it, T65.82 and the excluded code may both be reported.
What codes fall under T65.82? (4)
- T65.821Toxic effect of harmful algae and algae toxins, accidental (unintentional)not billable
- T65.822Toxic effect of harmful algae and algae toxins, intentional self-harmnot billable
- T65.823Toxic effect of harmful algae and algae toxins, assaultnot billable
- T65.824Toxic effect of harmful algae and algae toxins, undeterminednot billable
How long has T65.82 existed?
T65.82 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.