Warehouses, manufacturing plants, construction sites, and labs that require employees to wear respiratory protection – N95s used as required PPE, half-face cartridge respirators, PAPRs, or full-face units – are subject to OSHA's respiratory protection standard, 29 CFR 1910.134. Buried inside that standard is a requirement employers often miss until an inspector asks for the paperwork: every employee who must wear a respirator has to pass a medical evaluation first. This guide covers what the evaluation actually requires, who can perform it, and what triggers a more involved follow-up exam.
Setting up a respirator medical evaluation program? WorkOccMed can coordinate PLHCP-reviewed respirator evaluations for your workforce alongside pre-employment physicals and drug screening. Order services online or call (888) 233-4567.
Who actually needs this evaluation
The requirement applies to any employee for whom respirator use is required by the employer – because of a hazard assessment, an OSHA substance-specific standard, or company policy. It does not matter whether the respirator is an N95 filtering facepiece, a half-mask with cartridges, or a supplied-air unit; if wearing it is a condition of the job, the evaluation applies before that employee is fit tested or put to work in it.
There is one narrow exception: employees who voluntarily choose to wear a filtering-facepiece dust mask, with no requirement from the employer and no exposure that would otherwise require respiratory protection, are exempt from the medical evaluation. OSHA still requires the employer to give those employees the information sheet in Appendix D of the standard.
The Appendix C questionnaire
For most employers, the evaluation starts with OSHA's mandatory medical questionnaire, found in Appendix C of 29 CFR 1910.134. A physician or other licensed health care professional (PLHCP) can also substitute an in-person exam that collects the same information, but the vast majority of employers use the questionnaire as the first step.
- Confidentiality is built into the process. The questionnaire must be completed during normal work hours, or at a time and place convenient to the employee, and it goes directly to the PLHCP. The employer is not permitted to review an employee's individual answers.
- Part A, Section 1 collects basic information (job, respirator type to be used, work conditions) that does not require any medical evaluation.
- Part A, Section 2 asks about specific health conditions – heart disease, lung disease, prior respirator problems, claustrophobia, and similar questions. A "yes" answer to most of these (questions 1–8) is what can trigger a required follow-up exam.
- Part B covers additional questions used for employees who will wear certain higher-hazard respirators (like supplied-air or SCBA) or work in particularly demanding conditions.
When a follow-up medical exam is required
OSHA does not leave the follow-up decision to the employer. Under §1910.134(e)(3), a follow-up examination is required when an employee answers yes to any of the flagged questions in Section 2, Part A of the questionnaire, or when the PLHCP's review of the initial information otherwise indicates one is needed.
The follow-up exam is not a fixed checklist – it includes whatever tests, consultations, or diagnostic procedures the PLHCP decides are necessary to make a final determination. In practice this commonly means a focused history and physical, and sometimes a pulmonary function test or chest X-ray, depending on what the questionnaire flagged.
What the PLHCP has to tell the employer
The PLHCP's role is narrow by design. OSHA does not allow the employer to see the employee's actual medical answers – only the PLHCP's written recommendation, which is generally limited to:
- Any limitations on respirator use;
- The need for follow-up evaluation; and
- A statement that the PLHCP has had the opportunity to discuss the results with the employee.
That recommendation becomes part of the employer's written respiratory protection program records, but the underlying health information stays with the PLHCP, not the employer's HR file.
How often the evaluation has to be repeated
OSHA does not set a flat annual or biennial renewal schedule for respirator medical evaluations the way it does for some other exams. A new evaluation is required when:
- The PLHCP recommends a reevaluation, at whatever interval they specify;
- An employee reports signs, symptoms, or a medical condition that could relate to their ability to use a respirator safely;
- The employer's observations, or a supervisor's report, indicate a need; or
- A change in workplace conditions substantially increases the physiological burden on the employee (for example, a switch to a heavier respirator, longer wear time, or higher heat or exertion levels).
Many employers choose to re-screen on a set cycle anyway – often annually – to keep the program simple to track, even though the regulation itself is event-driven rather than calendar-driven. If an employee no longer needs to wear a respirator, the employer may discontinue further evaluations for that person.
Who pays, and who is responsible for setting it up
The medical evaluation is a required part of the employer's written respiratory protection program, not an optional benefit or something an employee arranges on their own. The employer identifies the PLHCP, provides the information the PLHCP needs about the respirator and the job's physical demands, and arranges for the evaluation to happen before the employee is fit tested or required to use the respirator at work.
How this fits with fit testing and other occupational health requirements
The medical evaluation is a separate step from fit testing, which confirms a specific respirator model and size seals properly on an individual employee's face. Fit testing cannot substitute for the medical evaluation, and the medical evaluation has to happen first. Employers building out a respiratory protection program typically coordinate this alongside other occupational health screening – pre-employment physicals, audiometric testing for noise-exposed workers, and non-DOT drug testing – so new hires complete everything in one visit instead of multiple appointments.
Frequently Asked Questions
Does every employee who wears a mask need a respirator medical evaluation?
No. The evaluation is required for any employee who must wear a respirator as a condition of their job. It does not apply to employees who choose on their own to wear a filtering-facepiece dust mask with no required respiratory protection program – those workers instead receive OSHA's Appendix D information sheet.
Who is allowed to review the medical questionnaire?
Only a physician or other licensed health care professional (PLHCP) designated by the employer. The questionnaire must go directly to the PLHCP, and the employer is not permitted to review an employee's answers.
What happens if an employee answers yes on the questionnaire?
A yes answer to certain questions in Section 2 of Appendix C, or any finding the PLHCP flags, triggers a required follow-up medical examination. The PLHCP decides what additional tests, such as a pulmonary function test, are needed before clearing the employee.
How often does the evaluation need to be repeated?
OSHA does not set a fixed renewal schedule. A new evaluation is required when the PLHCP recommends one, when workplace conditions change significantly, or when an employee reports signs or symptoms related to their ability to use a respirator.
Who pays for the evaluation?
The employer is responsible for arranging and providing the medical evaluation as part of its written respiratory protection program. It is not an optional or employee-funded step.
Reviewed by Chantal Gabriel, MD
Medical Director, WorkOccMed Medical Group, PLLC. This guide is reviewed by a certified medical examiner for accuracy. It is for general educational purposes and is not a substitute for reviewing 29 CFR 1910.134 directly or consulting your safety program administrator.