T59.2 is the authoritative medical code for Toxic effect of formaldehyde. This classification is used in medical billing and clinical recording to specify the clinical criteria for toxic effect of formaldehyde (ICD-10-CM T59.2), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Toxic effect of formaldehyde is a non-billable ICD-10-CM category code T59.2. A more specific billable subcode must be selected for claims submission. Includes: aerosol propellants. Excludes1 (not coded here): chlorofluorocarbons T53.5; contact with and suspected exposure to toxic substances Z77.-. Use additional code: 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.-. 7th character: The appropriate 7th character is to be added to each code from category T59.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T59.2 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- chlorofluorocarbons T53.5
- contact with and suspected exposure to toxic substances Z77.-
Use Additional Code
Supplementary codes the tabular list directs you to add.
- 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.-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can T59.2 be billed directly?
No. T59.2 (Toxic effect of formaldehyde) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T59.2 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T59.
What can't be coded together with T59.2?
Per Excludes1 instructions, T59.2 must not be reported with: chlorofluorocarbons (T53.5); contact with and (suspected) exposure to toxic substances (Z77.-).
Is an additional code needed with T59.2?
Use additional code(s) to specify: 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.-).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as T59.2, with their registry titles.
- T59 — Toxic effect of other gases, fumes and vapors
- T59.0 — Toxic effect of nitrogen oxides
- T59.0X — Toxic effect of nitrogen oxides
- T59.0X1 — Toxic effect of nitrogen oxides, accidental (unintentional)
- T59.0X1A — Toxic effect of nitrogen oxides, accidental (unintentional), initial encounter
- T59.0X1D — Toxic effect of nitrogen oxides, accidental (unintentional), subsequent encounter
- T59.0X1S — Toxic effect of nitrogen oxides, accidental (unintentional), sequela
- T59.0X2 — Toxic effect of nitrogen oxides, intentional self-harm
- T59.0X2A — Toxic effect of nitrogen oxides, intentional self-harm, initial encounter
- T59.0X2D — Toxic effect of nitrogen oxides, intentional self-harm, subsequent encounter
- T59.0X2S — Toxic effect of nitrogen oxides, intentional self-harm, sequela
- T59.0X3 — Toxic effect of nitrogen oxides, assault
- T59.0X3A — Toxic effect of nitrogen oxides, assault, initial encounter
- T59.0X3D — Toxic effect of nitrogen oxides, assault, subsequent encounter
- T59.0X3S — Toxic effect of nitrogen oxides, assault, sequela
- T59.0X4 — Toxic effect of nitrogen oxides, undetermined
- T59.0X4A — Toxic effect of nitrogen oxides, undetermined, initial encounter
- T59.0X4D — Toxic effect of nitrogen oxides, undetermined, subsequent encounter
- T59.0X4S — Toxic effect of nitrogen oxides, undetermined, sequela
- T59.1 — Toxic effect of sulfur dioxide
- T59.1X — Toxic effect of sulfur dioxide
- T59.1X1 — Toxic effect of sulfur dioxide, accidental (unintentional)
- T59.1X1A — Toxic effect of sulfur dioxide, accidental (unintentional), initial encounter
- T59.1X1D — Toxic effect of sulfur dioxide, accidental (unintentional), subsequent encounter
- T59.1X1S — Toxic effect of sulfur dioxide, accidental (unintentional), sequela
- T59.1X2 — Toxic effect of sulfur dioxide, intentional self-harm
- T59.1X2A — Toxic effect of sulfur dioxide, intentional self-harm, initial encounter
- T59.1X2D — Toxic effect of sulfur dioxide, intentional self-harm, subsequent encounter
- T59.1X2S — Toxic effect of sulfur dioxide, intentional self-harm, sequela
- T59.1X3 — Toxic effect of sulfur dioxide, assault
- T59.1X3A — Toxic effect of sulfur dioxide, assault, initial encounter
- T59.1X3D — Toxic effect of sulfur dioxide, assault, subsequent encounter
- T59.1X3S — Toxic effect of sulfur dioxide, assault, sequela
- T59.1X4 — Toxic effect of sulfur dioxide, undetermined
- T59.1X4A — Toxic effect of sulfur dioxide, undetermined, initial encounter
- T59.1X4D — Toxic effect of sulfur dioxide, undetermined, subsequent encounter
- T59.1X4S — Toxic effect of sulfur dioxide, undetermined, sequela
- T59.2X — Toxic effect of formaldehyde
- T59.2X1 — Toxic effect of formaldehyde, accidental (unintentional)
- T59.2X1A — Toxic effect of formaldehyde, accidental (unintentional), initial encounter
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
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