Becoming an addictionologist requires a minimum of 12 to 13 years of education and training after high school: four years of undergraduate study, four years of medical school, three to four years of residency, and one year of fellowship. There are two distinct board-certified paths into this field, and choosing the right one depends on your clinical interests and the type of patients you want to treat.
Addiction Medicine vs. Addiction Psychiatry
The term “addictionologist” is informal. In practice, physicians who specialize in treating substance use disorders hold board certification in either addiction medicine or addiction psychiatry. These two credentials overlap significantly in day-to-day clinical work, but they differ in training background and professional structure.
Addiction psychiatry is a formally recognized subspecialty under the American Board of Psychiatry and Neurology, which sits within the American Board of Medical Specialties (ABMS). This gives addiction psychiatrists a particular professional standing in the medical hierarchy, partly because of the well-documented overlap between addiction and mental illness. To pursue this path, you must first complete a full psychiatry residency and become board-certified in general psychiatry.
Addiction medicine, by contrast, is administered through the American Board of Preventive Medicine. It’s open to physicians from a much wider range of backgrounds. Addiction medicine physicians come from internal medicine, family medicine, neurology, emergency medicine, pediatrics, cardiology, and many other fields. This breadth is one of its defining features: you don’t need to be a psychiatrist to specialize in addiction.
Step 1: Undergraduate and Medical School
Like any physician path, you’ll start with a four-year bachelor’s degree. There’s no required major, but most applicants complete extensive coursework in biology, chemistry, organic chemistry, physics, and psychology to meet medical school prerequisites. After college, medical school takes another four years, whether you attend an MD or DO program. Both degrees qualify you for addiction-focused training later.
During medical school, seek out elective rotations in psychiatry, pain management, or community health settings where substance use disorders are common. These experiences won’t shorten your training timeline, but they’ll strengthen your fellowship applications and help you decide which residency path fits best.
Step 2: Choose Your Residency
Your residency choice is the most important fork in the road. It determines which board certification you’ll eventually pursue and shapes the lens through which you’ll treat patients for the rest of your career.
If you want to become an addiction psychiatrist, you must complete a psychiatry residency (typically four years) and earn board certification in general psychiatry before you can apply for an addiction psychiatry fellowship. This path gives you deep training in diagnosing and treating co-occurring mental health conditions like depression, anxiety, PTSD, and bipolar disorder alongside addiction.
If you want to pursue addiction medicine, your options are far broader. Addiction medicine fellowships accept physicians who have completed residency training in any of 24 primary specialties recognized by the ACGME. The most common feeder residencies are family medicine, internal medicine, and psychiatry, but emergency medicine, pediatrics, and others also qualify. A family medicine physician who completes an addiction medicine fellowship and a psychiatrist who does the same both earn the same addiction medicine credential.
Step 3: Complete a Fellowship
Both addiction medicine and addiction psychiatry require a one-year fellowship. These programs are accredited by the ACGME and provide intensive, focused training that goes well beyond what any residency covers.
During an addiction medicine fellowship, you’ll train across the full continuum of care: inpatient and residential treatment, outpatient programs, medically managed withdrawal, early intervention, harm reduction, and prevention. Core skills include comprehensive assessment and diagnosis of substance use disorders, motivational interviewing, screening and brief intervention techniques, and working within interdisciplinary teams that include counselors, psychologists, and social workers. You’ll treat patients across a range of ages, socioeconomic backgrounds, and levels of medical complexity, including those with co-occurring psychiatric conditions.
Addiction psychiatry fellowships cover similar clinical ground but place greater emphasis on the psychiatric dimensions of addiction, including psychopharmacology and dual-diagnosis treatment. These fellowships must be completed in a continuous block of at least half-time, and the exposure to addiction that psychiatry residents get during their general training does not count toward the fellowship year.
Addiction medicine fellowships are most commonly housed within family medicine, internal medicine, or psychiatry departments, though some are affiliated with emergency medicine or pediatrics programs. The American College of Academic Addiction Medicine maintains a directory of available programs to help with your search.
Step 4: Pass the Board Exam
After completing your fellowship, you’re eligible to sit for a board certification exam.
For addiction medicine, the certifying body is the American Board of Preventive Medicine. You must hold primary specialty certification through an ABMS member board (or equivalent Canadian or osteopathic board) and have completed a 12-month ACGME-accredited addiction medicine fellowship. If you apply more than 24 months after finishing your fellowship, you’ll need a letter of reference. This pathway is currently open through 2025, so check for any updates if you’re planning further ahead.
For addiction psychiatry, the American Board of Psychiatry and Neurology administers the exam. You must be board-certified in general psychiatry by December 31 of the year before the exam, and all licensing and training requirements must be met by July 31 of the exam year. The ABPN does not currently accept training from international programs.
What Addictionologists Actually Do
The day-to-day work centers on helping patients with substance use disorders at every stage, from crisis to long-term recovery. A large part of clinical practice involves medication-assisted treatment, which includes managing withdrawal symptoms, starting patients on medications that reduce cravings or block the effects of drugs, and prescribing bridging supplies of medication for patients who lack insurance coverage. You’ll also coordinate level-of-care assessments to determine whether a patient needs inpatient detoxification, residential rehabilitation, or outpatient maintenance.
One of the field’s most impactful shifts in recent years has been the move toward starting treatment in emergency and hospital settings rather than waiting for patients to access scarce inpatient detox beds. Physicians trained in addiction medicine can initiate treatment on the spot, connect patients with outpatient follow-up, and significantly reduce the bottleneck that historically left many people without timely care. Settings vary widely: you might work in a hospital consultation service, an outpatient clinic, a residential program, a correctional facility, or an academic medical center.
Salary and Career Outlook
Compensation varies significantly based on practice setting, geography, and whether you’re in academic or private practice. A 2025 UCLA posting for academic addiction medicine physicians listed a salary range of $142,100 to $429,000, which gives a sense of the spectrum. Physicians in private practice or those who combine addiction medicine with another specialty (like internal medicine or emergency medicine) may fall at different points along that range.
Demand for addiction specialists continues to outpace supply. The ongoing substance use crisis, expanded insurance coverage for addiction treatment, and a growing recognition that addiction requires specialized medical care all contribute to strong job prospects.
Keeping Your Certification Active
Board certification in addiction medicine isn’t permanent. You’ll need to maintain it through a 10-year cycle that includes four components: holding an active and unrestricted medical license, earning 250 continuing medical education credits (with at least 100 in approved self-assessment activities), passing a recertification exam in the final three years of each cycle, and completing two quality improvement projects. A patient safety course is also required in the first two years of each cycle. If you hold board certification in another specialty, some of these requirements can overlap, reducing the total burden.
Addiction psychiatry has its own maintenance requirements through the ABPN, following a similar structure of ongoing education, self-assessment, and periodic re-examination.