ATC in healthcare most commonly refers to Athletic Trainer, Certified, a credential held by healthcare professionals who specialize in preventing, diagnosing, and treating musculoskeletal injuries. You’ll also see “ATC” used in pharmacy and research contexts, where it stands for the Anatomical Therapeutic Chemical classification system, a standardized way of categorizing drugs. Both meanings come up frequently in healthcare settings, so here’s what each one involves.
ATC as a Professional Credential
When you see “ATC” after someone’s name, it means they are a Certified Athletic Trainer. This is a licensed healthcare professional who has earned a master’s degree from an accredited athletic training program and passed a comprehensive certification exam administered by the Board of Certification (BOC). The master’s degree became the mandatory entry-level requirement after a 2015 decision by the Athletic Training Strategic Alliance, and as of fall 2022, bachelor’s-level programs no longer enroll new students.
Athletic trainers are trained and evaluated across five practice domains: risk reduction and wellness, assessment and diagnosis, critical incident management, therapeutic intervention, and healthcare administration. They work under the collaboration of a physician and within their state’s practice act, meaning their exact scope of practice varies by location.
Where Athletic Trainers Work
The “athletic” in the title is somewhat misleading. While many ATCs work with sports teams at the high school, college, or professional level, their skills apply well beyond the field. Athletic trainers also work with military personnel, law enforcement agencies, and performing artists. You’ll find them in hospital systems, occupational health clinics, and industrial workplaces where physical demands put employees at risk for injury.
In sports settings, ATCs are typically present during practices and competitions, providing immediate care for acute injuries, monitoring for safety concerns, and making rapid decisions about whether an athlete can safely continue playing. This on-site, real-time role is one of the key distinctions between athletic trainers and other rehabilitation professionals.
How ATCs Differ From Physical Therapists
This is one of the most common points of confusion. Both ATCs and physical therapists (PTs) deal with injuries and movement, but their roles are distinct. Athletic trainers work primarily with people engaged in physical activity and are trained to manage injuries as they happen. They’re embedded in the environment where injuries occur, which means they handle emergency response, sideline assessments, and return-to-play decisions.
Physical therapists, by contrast, treat a broader range of patients, including older adults, people recovering from surgery, and those with chronic health conditions that impair movement. Their work is more structured: assessing a patient’s medical history, developing a rehabilitation plan, leading therapeutic exercises, and tracking progress over time. Think of the ATC as the professional who’s there when the injury happens, and the PT as the professional who guides long-term recovery afterward. In practice, the two often collaborate on the same patient’s care.
Maintaining the ATC Credential
Earning the certification is not a one-time event. Athletic trainers certified before 2026 must complete 40 continuing education units (CEUs) per renewal cycle to keep their credential active. Those certified in 2026 or later follow a slightly different structure, starting with 20 CEUs. This requirement ensures that ATCs stay current with evolving evidence and clinical practices throughout their careers.
ATC as a Drug Classification System
In pharmacy, epidemiology, and health policy, ATC refers to something entirely different: the Anatomical Therapeutic Chemical classification system, maintained by the World Health Organization. This system organizes every active drug substance into groups based on the organ or body system it targets, along with its therapeutic, pharmacological, and chemical properties.
The system uses a five-level code that gets progressively more specific. The diabetes drug metformin, for example, carries the code A10BA02. Each piece of that code tells you something:
- A (1st level): Alimentary tract and metabolism, the broad body system
- A10 (2nd level): Drugs used in diabetes, the therapeutic subgroup
- A10B (3rd level): Blood glucose lowering drugs excluding insulins
- A10BA (4th level): Biguanides, the chemical subgroup
- A10BA02 (5th level): Metformin itself
There are fourteen main anatomical groups at the top level, covering everything from the nervous system to anti-infectives to hormones.
Why the ATC Classification System Matters
The ATC system is paired with a measurement called the Defined Daily Dose (DDD), which represents the assumed average daily maintenance dose of a drug for its primary use in adults. Together, the ATC code and the DDD give researchers and policymakers a standardized way to compare drug consumption across countries, regions, and time periods. Without this system, comparing medication use internationally would be nearly impossible, since brand names, packaging sizes, pricing, and typical dosages all vary from one country to the next.
If you encountered “ATC” on a prescription label, in a hospital job listing, or in a research paper, the context usually makes the meaning clear. A person’s name followed by “ATC” points to the athletic training credential. A seven-character alphanumeric code points to the WHO drug classification.