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T65.91XA Internal Medicine
Updated March 2026

Toxic effect of unspecified substance, accidental (unintentional), initial encounter

ICD-10 Code: T65.91XA · Body Part: Lumbar Spine

QME Evaluation Process

Exposure history documentation, organ-specific evaluation based on toxicant. Rate impairment per affected organ system chapters.

Typical Impairment Rating

Varies widely based on affected organ systems

AMA Guides Edition

5th Edition

Common Treatments

+ Remove exposure
+ Organ-specific treatment
+ Monitoring

Related Conditions

Body Part Guide

Lumbar Spine Evaluation Guide

Impairment rating methods, common conditions, and QME evaluation protocols

View Guide →

QME Specialties for Toxic effect of unspecified substance, accidental (unintentional), initial encounter

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Browse QME-certified physicians who evaluate toxic effect of unspecified substance, accidental (unintentional), initial encounter and related lumbar spine conditions in California.

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Frequently Asked Questions

What is Toxic effect of unspecified substance, accidental (unintentional), initial encounter (T65.91XA)?

Toxic effect of unspecified substance, accidental (unintentional), initial encounter is an ICD-10 diagnosis code (T65.91XA) classified under Internal Medicine conditions. It affects the Lumbar Spine and is commonly encountered in California workers' compensation claims. QME physicians evaluate this condition using AMA Guides 5th Edition protocols.

How is T65.91XA rated for impairment?

The typical whole person impairment (WPI) range for Toxic effect of unspecified substance, accidental (unintentional), initial encounter is Varies widely based on affected organ systems. The exact rating depends on clinical findings, imaging, and the evaluation method (DRE or ROM) chosen by the QME physician per AMA Guides 5th Edition.

What is the QME evaluation process for T65.91XA?

Exposure history documentation, organ-specific evaluation based on toxicant. Rate impairment per affected organ system chapters.

What treatments are common for Toxic effect of unspecified substance, accidental (unintentional), initial encounter?

Common treatments for Toxic effect of unspecified substance, accidental (unintentional), initial encounter include Remove exposure, Organ-specific treatment, Monitoring. Treatment appropriateness and outcomes are considered during the QME evaluation when determining permanent and stationary status and apportionment.