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Medical Gas Inspector 6020

  • The initial cost for this certification is $177.00.
  • Candidates must score a minimum of 80% to pass.
  • Candidates can re-take the exam if they fail for an additional $177.00 fee.
  • This certification is valid for three (3) years from issuance.
  • Recertification can be accomplished by (1) completing a minimum 4-hour training course to subsequent editions of NFPA 99, and (2) successfully passing a proctored multiple-choice open book examination. Both the course and the examination are required according to ASSE 6000, sections 40-3.3.1 and 40-3.3.2.  The recertification examination contains forty questions based on the most current edition of the NFPA 99. Candidates must answer a minimum of thirty (30) of the questions (75%) correctly on the examination to achieve a passing grade. Two (2) hours are allowed for the examination.

Effective July 1, 2020, Medical Gas Examinations will only be administered by computer.


A Medical Gas Inspector certification candidate is a qualified individual who can demonstrate competence within their scope and will be proficient in and experienced in inspecting installations of medical gas and vacuum systems covered by the ASSE Series 6000 Standard. Inspectors include any individual who inspects the installation of medical gas and vacuum distribution systems. A qualified Medical Gas Inspector may perform these tasks alone, or through the supervision of other individuals.

In addition to knowledge of product installations, a Medical Gas Inspector is required to have a general knowledge of the applicable laws, codes, rules, listing agencies, and regulations from the federal, state, and local levels pertaining to medical gas and vacuum systems as well as knowledge of product performance, system and system component testing, documenting and recording, and medical gas terminology.

Medical gas systems and equipment covered in the ASSE Series 6000 Standard include health care facilities within the scope of NFPA 99, Health Care Facilities Code. Medical gas piping systems include vacuum piping.

To Qualify

  • Candidate shall be employed by a governmental unit as a plumbing and/or mechanical inspector, or as an administrator of such inspector; or be a person regularly involved in the design, inspection, verification of medical gas systems or be a 6010 installer.   Candidates shall have a minimum of two (2) years of documented practical experience or any combination of the above.
  • Candidate shall have completed a minimum 24-hour training course conducted by a Medical Gas Systems Instructor certified to ASSE Standard 6050

Application and Examination Request Forms

Submit Forms Online

Medical Gas Inspector Examination Request Form
Medical Gas Inspector Application (PSI ONLY)
PSI Registration Form for Medical Gas Recertification (PSI ONLY)

Recertification Forms

Available Medical Gas Courses

For a list of Medical Gas Courses and Independent Instructors Click Here.

NFPA 99 Online Training Preparation for ASSE Series 6000 Recertification

If you are NITC certified in the installation, inspection, verification, and/or maintenance of medical gas and vacuum systems, one place you can get the training to maintain your certification to ASSE 6000 series is the new NFPA 99 online training series.

This four-hour course fulfills ASSE requirements for a refresher course as part of recertification to the new edition of NFPA 99. The internet-based NFPA training course allows you to work online in your own timeframe to earn the mandated Continuing Education Credit (CEU). Upon successful completion of the course series, participants will be prompted to download the CEU certificate directly from the course site.

Visit NFPA to get all the details on the course and how to register for it.

Locate PSI Centers

To find the nearest PSI location follow steps 1 – 5:
1. Click on the link: Nearest PSI Location
2. On the Select Organization drop down select Certification/Professional Associations
3. On the Select Sponsor Name drop down select National Inspection, Testing and Certification Corporation ( NITC)
4. On Select the Examination Name, Select the exam you are interested in taking, the click on continue at the bottom of the page.
5. Next enter you zip code and search for the nearest location.
If you need any help please feel free to call NITC at (877) 457-6482.