Allied Health certifications explained: NHA, ASCP, AMT, NBSTSA, and more

You finish your classes. Now you have to pass an exam. But which one? The allied health credentialing space is crowded, and the abbreviations are confusing. Here's the field, plainly.

Why certification matters

Certification is rarely legally required, but it's effectively required to be competitive in most allied health hiring. Employers screen out uncertified applicants early, and for good reason: a credential signals that an external body has tested you against a standard. It also gives the employer cover if a state inspection or accreditation review asks about the qualifications of their staff.

Most credentials require continuing education to maintain — typically 10–15 hours every one or two years. CE requirements are easy if you're working; many of them come from on-the-job in-services and free webinars from the certifying body itself.

NHA — National Healthcareer Association

The NHA is modern, aggressive, and the fastest-growing credentialing body in allied health. They issue the CPT (phlebotomy), CCMA (medical assistant), CET (EKG), CRCST is actually HSPA, but for medical assisting, EKG, phlebotomy, and patient care tech, NHA is the dominant brand at newer programs.

NHA exams are computer-based, accessible, and designed to be passable in a focused 4–8 weeks of study. If you're sitting for the CCMA, MAExamPrep is built directly to the official blueprint. For the CPT, PhleboPrep is the equivalent.

AMT — American Medical Technologists

AMT has been around since 1939 and has the legacy reputation that comes with that. They issue the RMA (medical assistant) and RPT (phlebotomy). Their exams are considered slightly more rigorous and lab-clinical in flavor than the NHA's. Older, established hospital systems often prefer AMT credentials because of their history.

ASCP — American Society for Clinical Pathology

The ASCP is the gold standard for anything in the laboratory. They issue the PBT (phlebotomy) and a long list of higher-level lab credentials (MLT, MLS, specialty certifications). If you want to work in a major hospital lab — particularly an academic medical center — the PBT is the credential most respected. The exam is harder than the NHA CPT and includes more depth on lab safety and specimen integrity.

AAMA — American Association of Medical Assistants

The AAMA is the oldest and most prestigious medical assistant credential — the CMA. The catch: you can only sit for the CMA if you graduate from a CAAHEP- or ABHES-accredited program. This means the credential is harder to access, but it's still preferred at some legacy hospital systems and academic medical centers.

NBSTSA, HSPA, and CBSPD

Three bodies cover the surgery-adjacent careers. NBSTSA (National Board of Surgical Technology and Surgical Assisting) issues the CST — the dominant credential for surgical techs. HSPA (Healthcare Sterile Processing Association) issues the CRCST, the most common sterile-processing credential, and CBSPD issues the CSPDT, which is accepted nearly everywhere the CRCST is.

For all three exams, ScrubPrep covers the blueprints with practice exams matched to actual content domains and item formats.

NCCT — National Center for Competency Testing

NCCT issues credentials across allied health (NCMA for medical assistants, NCPT for phlebotomy, TS-C for surgical tech) and is widely accepted but less prestigious than NHA, AMT, ASCP, AAMA, or NBSTSA in the same fields. It's a fine option if your school partners with NCCT or your target employer recognizes it specifically.

How to pick

The honest answer: pick the credential your training program is built around. Programs align their curriculum with one specific exam, and you'll have the strongest pass odds with the one your instructors prepared you for.

If you have no program preference, default to the dominant credential in each field: CCMA (NHA) for medical assisting, CPT (NHA) for phlebotomy, CST (NBSTSA) for surgical tech, CRCST (HSPA) for sterile processing, CET (NHA) for EKG. These open the most doors. You can always add additional credentials later.

For more on a specific path, see the career guides or our career paths after your first certification piece.