Public health sits in a gray area: it is officially part of the broad STEM umbrella, but not all public health degrees carry the same classification. The answer depends on which definition of STEM you’re using and, more practically, which concentration within public health you choose. For international students on F-1 visas, this distinction can mean the difference between one year and three years of post-graduation work authorization.
How Federal Agencies Define STEM
There is no single government-wide definition of STEM. Two major frameworks matter most, and they treat public health differently.
The National Science Foundation groups all degree fields into three buckets: science and engineering (S&E), S&E-related, and non-STEM. Public health falls into the S&E-related category, alongside other health professions. The NSF considers S&E-related fields part of STEM, so under this framework, a general public health degree counts. This classification affects federal research funding, workforce statistics, and how the government tracks the STEM pipeline.
The Department of Homeland Security maintains a narrower, more consequential list: the STEM Designated Degree Program List. This is the list that determines whether international students qualify for an extended work permit after graduation. A general Master of Public Health (MPH) is not automatically on this list. Only specific sub-disciplines within public health qualify, identified by their Classification of Instructional Programs (CIP) code. As of 2024, the DHS list includes epidemiology, epidemiology and biostatistics, environmental health, infectious disease and global health, and veterinary preventive medicine/epidemiology/public health. A broad MPH in health policy or community health, for example, does not appear.
Which Public Health Concentrations Qualify
The concentrations that DHS recognizes as STEM share a common thread: they rely heavily on quantitative methods, laboratory science, or data analysis. Epidemiology is the study of how diseases spread through populations, built on statistical modeling. Biostatistics applies advanced math to health data. Environmental health examines chemical, biological, and physical exposures using scientific measurement. These fit comfortably within STEM by any definition.
Concentrations focused on health policy, health education, community health, or health management lean more on social science and administration. DHS has consistently declined to classify patient care and business-oriented fields as STEM, even when they exist inside a school of public health. In its most recent 2024 update to the STEM list, DHS received 133 nominations for new fields but added none related to public health, reaffirming this boundary.
The practical takeaway: the school you attend and the specific CIP code assigned to your degree program determine your STEM status, not just the words on your diploma.
Universities Are Reclassifying Their Programs
A growing number of top public health schools have moved to get their MPH programs STEM-designated by aligning their curricula with qualifying CIP codes. Johns Hopkins Bloomberg School of Public Health, for instance, now classifies its MPH program and its MPH/MBA dual degree as STEM-designated, effective for students graduating from May 2023 onward. Other schools have done the same by mapping their programs to epidemiology or biostatistics CIP codes, even when the degree title remains “Master of Public Health.”
This means two students earning an MPH at different universities could have different STEM classifications. Before enrolling, check whether your specific program carries a STEM-designated CIP code. Your school’s international student office or registrar can confirm this, and it should be listed on your I-20 form if you’re an international student.
What the Coursework Actually Looks Like
The STEM-designated branches of public health are genuinely quantitative. A biostatistics program at the University of North Carolina, for example, requires three semesters of calculus, linear algebra, advanced calculus, scientific programming, and a biology sequence before students even begin their major coursework. The core biostatistics classes cover statistical computing, probability and inference, experimental analysis, survey methodology, and study design. This is a math-heavy curriculum by any standard.
Epidemiology programs follow a similar pattern, with required coursework in study design, regression analysis, and data management. Even broader MPH programs increasingly require competency in statistical software and data visualization. The CDC trains its public health workforce in R (using packages like tidyverse and ggplot2 for statistical modeling and visualization), SAS, Tableau, Power BI, Databricks, and cloud-based analytics platforms. Python integration is standard. Modern public health practice relies on the same data science tools used across other STEM fields.
Why This Matters for International Students
The most tangible consequence of STEM designation is the Optional Practical Training (OPT) extension available to F-1 visa holders. All international students who complete a U.S. degree can work for 12 months after graduation. Students whose degree appears on the DHS STEM list can apply for an additional 24-month extension, bringing the total to 36 months of work authorization.
To qualify for the STEM OPT extension, you need a bachelor’s, master’s, or doctoral degree from an accredited, SEVP-certified institution, and the degree’s CIP code must appear on the DHS list. There is one useful workaround: if you earn a non-STEM MPH but previously completed a STEM-designated degree at a U.S. institution (say, a bachelor’s in biostatistics), you can use that earlier degree to apply for the extension, as long as your job is directly related to that STEM degree. If you later earn another qualifying STEM degree at a higher level, you may be eligible for a second 24-month extension.
For Domestic Students and Job Seekers
If you’re a U.S. citizen or permanent resident, the STEM designation matters less for work authorization but still carries weight. STEM-classified degrees can qualify you for certain federal scholarships, loan forgiveness programs, and hiring preferences. Some employers in tech and data-heavy industries filter for STEM degrees when recruiting, and a STEM-designated MPH can open doors that a non-STEM MPH might not.
From a career standpoint, public health roles that involve data analysis, disease surveillance, environmental monitoring, or biostatistics are treated as STEM-intensive occupations regardless of how your degree is classified. The Department of Labor’s O*NET system tags occupations requiring STEM education, and many public health analyst and epidemiologist roles fall into this category. Your actual skill set, particularly your comfort with statistical software, study design, and data interpretation, matters more to employers than the label on your transcript.