# Mental, nervous, organic, or functional disease or psychiatric disorder — Medical conditions that disqualify a commercial driver under 49 CFR 391.41

For Mental, nervous, organic, or functional disease or psychiatric disorder, standard, as the regulation states it is (9) Has no mental, nervous, organic, or functional disease or psychiatric disorder likely to interfere with his/her ability to drive a commercial motor vehicle safely;; paragraph is (b)(9); regulation section is 49 CFR 391.41, recorded from its source on 2026-08-31; source re-checked 2026-09-15.

- **Disqualifying condition or standard:** Mental, nervous, organic, or functional disease or psychiatric disorder _(our reading, not quoted from the source)_
- **Standard, as the regulation states it:** (9) Has no mental, nervous, organic, or functional disease or psychiatric disorder likely to interfere with his/her ability to drive a commercial motor vehicle safely; _(verified: appears in the quote below)_
- **Paragraph:** (b)(9) _(our reading, not quoted from the source)_
- **Regulation section:** 49 CFR 391.41

## What the source says

> (9) Has no mental, nervous, organic, or functional disease or psychiatric disorder likely to interfere with his/her ability to drive a commercial motor vehicle safely;

## Source

- https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.41

Last verified: 2026-09-15. Review by: 2027-08-31.
Part of [Medical conditions that disqualify a commercial driver under 49 CFR 391.41](https://referencesource.org/dot-cdl-medical-disqualifying-conditions/).