Key Takeaways
- Pulmonology is a subspecialty of internal medicine focused on the respiratory system. Becoming a pulmonologist requires completing medical school, a three-year internal medicine residency, and a two- to three-year fellowship.
- The total timeline from high school to independent practice runs approximately 13 to 14 years, depending on whether you pursue a pulmonary-only or combined pulmonary and critical care fellowship.
- Both MD and DO pathways lead to pulmonology. What matters most is completing internal medicine residency first, as there is no direct entry into pulmonology training.
A pulmonologist is a doctor who treats conditions that affect the lungs, airways, and breathing. This specialty is closely connected to internal medicine and critical care, since many patients need help with complex breathing problems, long-term lung disease, or serious illness. Demand for pulmonologists has also grown steadily in the years following COVID-19.
Becoming a pulmonologist takes about 13 to 14 years of education and training after high school. The process happens in clear stages, from college and medical school to residency and fellowship, so it helps to understand what each stage involves before you begin.
What Is a Pulmonologist?
Pulmonology is a subspecialty of internal medicine focused on the diagnosis and treatment of diseases affecting the respiratory tract, including the lungs, bronchi, trachea, and pleura. Pulmonologists manage both chronic and acute conditions and often work closely with critical care teams in hospital settings.
Common conditions pulmonologists treat include:
- Asthma and chronic obstructive pulmonary disease (COPD)
- Pneumonia and other respiratory infections
- Lung cancer (in coordination with oncology)
- Pulmonary fibrosis and interstitial lung diseases
- Sleep apnea and other sleep-related breathing disorders
- Tuberculosis and other mycobacterial infections
- Pulmonary hypertension
In addition to managing these conditions clinically, pulmonologists perform a range of procedures. These include bronchoscopy (a direct examination of the airways), pulmonary function testing to assess lung capacity and airflow, and thoracentesis, which involves draining fluid from around the lungs. Pulmonologists who specialize in critical care also manage mechanical ventilation for patients in the ICU.
How to Become a Pulmonologist
The path to pulmonology follows a clear sequence: undergraduate education, medical school, internal medicine residency, and fellowship.
Step 1: Complete a bachelor’s degree
The first step is a four-year undergraduate degree. You don’t need a specific major to apply to medical school, but you do need to complete a set of prerequisite coursework regardless of what you study. Common majors for pre-med students include biology, chemistry, biochemistry, neuroscience, and public health, though students from other fields are accepted regularly.
Required pre-med prerequisites typically include:
- Biology (with lab)
- General chemistry (with lab)
- Organic chemistry (with lab)
- Physics (with lab)
- Biochemistry
- Mathematics or statistics
- English or writing
Beyond coursework, admissions committees look for a strong GPA, competitive MCAT scores, clinical experience through volunteering or working in healthcare settings, physician shadowing, and research involvement where possible. Starting to build these components early in your undergraduate years makes the medical school application process significantly more manageable. Reviewing the med school application timeline can help you plan these milestones well in advance.
Step 2: Attend medical school
Medical school is a four-year program that combines foundational science education with hands-on clinical training. Both MD and DO programs lead to pulmonology. The degree you earn affects which licensing exams you take, but both pathways allow you to pursue internal medicine residency and pulmonary fellowship.
Years one and two focus on preclinical sciences: anatomy, physiology, pharmacology, pathology, microbiology, and biochemistry. This is primarily classroom and lab-based learning.
Years three and four move into clinical rotations across core specialties. Internal medicine is one of the core clerkships and gives students early exposure to the patient population and clinical reasoning style most relevant to pulmonology.
During medical school, students take the USMLE Step 1 (typically after year two) and USMLE Step 2 CK (in year three or four). DO students take the COMLEX-USA equivalents. These scores play a significant role in residency applications. In the fourth year, students apply to internal medicine residency programs through the Electronic Residency Application Service (ERAS) and participate in the National Resident Matching Program (NRMP) Match.
The medical school classes you take during your undergraduate and the MCAT preparation you invest in both influence your options at this stage.
Step 3: Complete an internal medicine residency
Pulmonology does not offer a direct-entry residency. To become a pulmonologist, you first complete a three-year residency in internal medicine. This step is required.
During residency, you rotate through inpatient medicine wards, outpatient clinics, the ICU, cardiology, and other internal medicine subspecialties. The training builds broad clinical competency across adult medicine and prepares residents for the focused subspecialty work of fellowship.
USMLE Step 3 is taken during residency, typically in the first or second year. Passing Step 3, combined with completing residency, satisfies the requirements for full medical licensure in most U.S. states.
By the third year of residency, physicians who want to subspecialize in pulmonology apply to fellowship programs through a separate match process, the National Residency Matching Program’s subspecialty match.
Step 4: Complete a pulmonary disease fellowship
Fellowship is the stage where you train specifically in pulmonology. There are two main paths:
- Pulmonary disease fellowship (2 years): Focused training in lung disease diagnosis and management. Graduates practice as pulmonologists without a critical care component.
- Combined pulmonary and critical care medicine fellowship (3 years): The more common path. Graduates are trained in both pulmonology and intensive care medicine, qualifying them to manage ICU patients alongside their pulmonary practice.
Most applicants pursue the combined track. The added year of training opens significantly more career options, particularly in hospital-based and academic medicine settings where critical care coverage is often integrated with pulmonary practice.
During fellowship, trainees develop advanced skills in bronchoscopy, mechanical ventilation management, complex pulmonary function interpretation, ICU care, and the diagnosis of interstitial lung diseases and sleep-related breathing disorders. Fellowship positions are paid, though compensation is lower than attending-level salaries.
Step 5: Earn board certification and state licensure
After completing fellowship, physicians apply for state medical licensure in the state where they plan to practice. Licensure requires passing all three steps of the USMLE (or COMLEX equivalents) and completing an accredited residency program. Each state’s medical board sets its own application requirements, though the core exam requirements are consistent nationally.
Board certification in pulmonary disease is granted by the American Board of Internal Medicine (ABIM). After completing an accredited fellowship, physicians sit a written subspecialty examination. Those who complete the combined fellowship can pursue dual certification in both pulmonary disease and critical care medicine.
Ongoing practice also requires:
- Maintenance of Certification (MOC): ABIM-certified physicians must complete periodic assessments and continuing medical education to maintain their certification status.
- DEA registration: Pulmonologists who prescribe controlled substances, including certain respiratory medications and sedatives used in procedures, must hold an active Drug Enforcement Administration (DEA) registration.
Skills and Qualities of a Successful Pulmonologist
Training prepares you to practice. But certain qualities determine how effective and sustainable your work is over time.
- Technical and procedural skills: Technical and procedural aptitude matters from early in fellowship. Bronchoscopy, thoracentesis, and mechanical ventilator management all require hands-on precision developed through repeated, supervised practice.
- Diagnostic reasoning: Strong diagnostic reasoning is central to the specialty. Many respiratory symptoms, including dyspnea, cough, and hypoxia, overlap across multiple conditions. Pulmonologists need to think systematically and work through uncertainty while narrowing down possible causes.
- Communication in chronic care: Communication skills are especially important in long-term care. Many pulmonary patients live with conditions like COPD or pulmonary fibrosis, so building trust, supporting treatment plans, and helping patients manage daily life are key parts of the role.
- Managing high-acuity cases: The ability to handle urgent, high-risk cases is essential in critical care. ICU patients can change quickly, and pulmonologists must make important decisions under pressure.
Pulmonologist Salary and Job Outlook
Pulmonology is among the better-compensated internal medicine subspecialties. According to the latest data, pulmonologists earn an average of around $300,000 to $400,000 annually, with variation based on practice setting, geography, and whether critical care is included in the role.
Demand for pulmonologists is supported by several converging factors:
- An aging U.S. population with higher rates of COPD, lung cancer, and sleep-disordered breathing
- Ongoing post-COVID respiratory care needs, including long COVID-related lung complications
- Increasing recognition of air quality and occupational lung disease as public health concerns
The Bureau of Labor Statistics projects overall physician employment to grow 3% through 2034, with subspecialists in high-demand fields positioned well within that broader trend.
Start Building the Path Now
Becoming a pulmonologist takes time, but each stage has a clear purpose. Undergraduate study builds your foundation, medical school develops clinical thinking, residency builds broad skills, and fellowship focuses that training into a specialty that treats serious and common respiratory conditions.
If you’re still deciding where to pursue your medical education, accredited Caribbean schools offer a legitimate path to U.S. internal medicine residency and subspecialty training. Students from these programs have successfully matched into internal medicine and gone on to complete pulmonary fellowships. Reviewing Caribbean med school requirements is a practical starting point, and if you’re earlier in the process, understanding what the path looks like from high school to med school can help you plan well ahead of application season.
When you’re ready to compare accredited programs, fill out the Find Your Med School form to get matched with options that fit your background and goals.
Frequently Asked Questions (FAQs)
What is the difference between a pulmonologist and a respiratory therapist?
A pulmonologist is a physician who has completed medical school, residency, and fellowship training and is licensed to diagnose conditions, prescribe medications, and perform procedures. A respiratory therapist is an allied health professional who implements breathing treatments and ventilator management under a physician’s orders, but does not diagnose or independently manage disease.
Do pulmonologists perform surgery?
Pulmonologists are not surgeons, but they do perform minimally invasive procedures such as bronchoscopy, thoracentesis, and endobronchial ultrasound (EBUS). Surgical lung procedures, including lobectomy or lung transplantation, are performed by thoracic surgeons.
