Medical Journals Ranked by Impact Factor: A 2026 Comparison Guide

Medical journal impact factors help researchers compare the citation performance of academic journals and make informed decisions about manuscript submission. At The Med Writers, we go the extra mile to ensure the quality of our medical and academic writing. One way we do that is to choose the most consequential and authoritative sources of information for our writing. Choosing high-quality and reputable primary research and review articles can strengthen the credibility of our clients, whether they be researchers, physicians, pharmaceutical companies, biotechnology firms, medical-device manufacturers, or policymakers. Top-notch informational references and citations can strengthen the accuracy and credibility of medical writing and improve its impact on the target audience or likelihood for publication.

As well, journal selection is a decisive factor in manuscript submission. Researchers and clinicians have a wide variety of academic journals that may be appropriate for publishing their research studies, review articles, case studies, or opinion pieces. Choosing the correct journal for submission increases the chances of acceptance for publication and increases the impact and distribution of their article.

Journal Impact Factor (IF) is one of the most widely recognized metrics used to rank and compare academic journals. However, the IF is frequently misunderstood. A high IF does not guarantee that an individual article will be influential, nor does it automatically make a journal the best choice for every manuscript.

This guide explains how IF is calculated, presents current IFs for selected leading medical journals, and explains how to use journal rankings when assessing the quality of a journal or planning a submission.

 

What Is a Medical Journal Impact Factor?

The Medical Journal Impact Factor, or simply Impact Factor (IF), measures how frequently a journal’s recent publications were cited during a particular year. Official scores are published annually in the Journal Citation Reports (JCR) by Clarivate, a private data and insights & analytics company. Clarivate calculates the IF as a ratio as follows:

• Numerator: Total citations in a given year of articles published in that journal over the prior two years. This may include citations to a number of types of journal content (including editorials, letters, news articles, and meeting abstracts).
• Denominator: Total number of citable items (research articles and reviews) published in those same two years.

Clarivate counts citations posted in one year to articles published in the prior two years. For example, if a journal’s eligible 2023 and 2024 articles received 10,000 citations during 2025, and the journal published 500 citable items during those two years, its impact factor would be 20.0.

The IF functions as a journal-level citation indicator. It was not intended to provide a direct assessment of the scientific quality of every article associated with a journal, and IFs may not be directly comparable between scientific disciplines and medical specialties.

 

Why IFs Differ Across Disciplines and Specialties

IFs are not necessarily congruent between journals that deal with different subject matters. Several confounding factors influence citation rates and therefore IFs.

 

Citation speed

Rapidly moving subject fields with greater citation density (such as molecular biology) may receive more citations and therefore have an inflated IF compared to narrower or slower-moving fields that accumulate fewer citations. More robust or active fields also may generate citations sooner after publication. In specialties where research takes longer to disseminate or influence practice, the standard window may underestimate longer-term importance.

 

Number of researchers

Large disciplines produce more articles and more potential citations than do smaller subspecialties.

 

Article type favored by a journal

Systematic reviews, meta-analyses, guidelines, and consensus statements are generally cited more frequently. Journals publishing predominantly such articles may have higher IFs than journals concentrated on original research.

 

Health crises

Pandemics, disasters, or rapid changes in clinical practice can temporarily and aberrantly increase citation activity in journals that have subject matter related to the crisis. The COVID-19 period demonstrated how strongly exceptional events can alter journal metrics.

 

Clarifying the 2026 Journal Impact Factors

Clarivate released the 2026 edition of its JCR in June 2026. The figures published in the 2026 edition are called the 2025 Journal IFs because they measure citations received during 2025. For example, the 2025 IF for The New England Journal of Medicine (NEJM) is 84.5, although that result appeared in the 2026 Journal Citation Reports. This naming convention can cause confusion. In practical terms:

• 2026 Journal Citation Reports refers to the edition released in 2026.
• 2025 Journal IF refers to the citation year used to calculate the metric.

Journal websites may describe the same number as their “2025 IF” or their “IF in the 2026 JCR.” Whenever an IF is quoted, its year and source should be stated for context.

 

Selected Medical Journals Ranked by 2025 Impact Factor

The following table compares selected 2025 IFs published in the 2026 JCR. It is not an exhaustive list, but a sampling that shows some of the higher-ranked and lower-ranked journals by IF.

 

Rank in the 2026 comparison	Journal	Primary field	2025 IF
1	The New England Journal of Medicine	General and internal medicine	84.5
2	JAMA	General and internal medicine	65.4
3	The BMJ	General and internal medicine	55.1
4	The Lancet Neurology	Clinical neurology	54.6
5	The Lancet Gastroenterology & Hepatology	Gastroenterology and hepatology	39.1
6	The Lancet Diabetes & Endocrinology	Endocrinology and metabolism	36.3
7	The Lancet Respiratory Medicine	Respiratory and critical-care medicine	34.7
8	The Lancet Oncology	Oncology	33.7
9	The Lancet Rheumatology	Rheumatology	29.5
10	The Lancet Infectious Diseases	Infectious diseases	29.4
11	Nature Methods	Biomedical research methods	28.3
12	JAMA Internal Medicine	Internal medicine	23.3
13	The Lancet Psychiatry	Psychiatry	21.1
14	The Lancet Haematology	Hematology	20.4
15	American Journal of Psychiatry	Psychiatry	15.9
16	The Lancet HIV	HIV and infectious diseases	14.6
17	JMIR Medical Education	Medical education	13.9
18	The Lancet Child & Adolescent Health	Pediatrics	13.4
19	NEJM AI	Artificial intelligence in medicine	11.6
20	CHEST	Pulmonary and critical-care medicine	10.2
21	JAMA Network Open	General medicine; open access	9.7
22	Journal of Medical Internet Research	Digital health and informatics	8.2
23	Medical Education	Health-professions education	6.2
24	BMJ Open	General medical research; open access	2.5

 

The list demonstrates why cross-specialty ranking comparisons must be interpreted cautiously. A value of 13.9 placed JMIR Medical Education first among 89 journals in its scientific-education category, whereas a journal with the same IF in another specialty might occupy a very different position.

 

Similarly, The Lancet Infectious Diseases ranked first among 141 infectious-disease journals with an impact factor of 29.4, while The Lancet Neurology ranked first among 296 clinical-neurology journals with a substantially higher value of 54.6. The difference does not establish that neurology research is more important than infectious disease research or that The Lancet Neurology is a much higher quality journal than The Lancet Infectious Diseases. Rather, the relative IFs must be interpreted in light of the factors discussed in the previous section.

 

The Limitations of Ranking Journals by IF

IF is useful when used in the proper context and with an understanding of what it represents. However, it is not a guarantee of journal quality. Some of the limitations of the IF as a measure of journal quality include the following:

• An article may be cited due to the uniqueness or significance of the data it contains rather than the quality of the article.
• There may be a wide disparity in the quality of articles within a publication.
• Not every journal is included in Clarivate’s JCR. A journal must be published for a minimum of 3 years before it is considered for inclusion in the report.
• Citation distributions are highly skewed. In many journals, a minority of articles generate a large proportion of total citations. Consequently, the IF may tell readers little about the potential influence of a particular paper.
• A citation is not necessarily an endorsement. Articles may be cited because their findings are important, controversial, methodologically instructive, or being challenged. Citation frequency does not necessarily establish accuracy, reproducibility, clinical utility, or quality.
• Although Clarivate takes measures to identify such practices, self-citation—where a journal preferentially cites other articles from that journal—may inflate a journal’s IF.
• Differences in journal or discipline citation practices, editorial policies, and rate of knowledge production can make an IF of 10 exceptional in one journal or discipline and relatively low in another.
• Clarivate has changed their methodology over time. For example, beginning with the 2025 results based on 2024 data, citations to and from retracted articles were excluded from IF calculations. Annual values must therefore be interpreted in the context of calculation policies.

 

Other Journal Metrics to Consider

Several other indicators are available for assessing journal prestige and impact.

 

Five-year IF

The five-year IF is calculated using a longer publication span, making it especially useful in disciplines where research is less robust or citations accumulate slowly.

 

Journal Citation Indicator (JCI)

The JCI normalizes citation impact between research fields. A value of 1.0 represents average citation impact for comparable publications in that category. This can make it more suitable than IF for some interdisciplinary comparisons.

 

Source Normalized Impact per Paper (SNIP)

The SNIP is designed to overcome the difficulties in comparing IFs between disciplines. It measures a medical journal’s citation impact in a more contextual way by adjusting for the different citation practices and frequencies found in various fields. An SNIP score of 1.0 means that a journal has reached the median citation impact for its field; a score above 1.0 indicates a higher impact, and less than 1.0 represents a lower impact. The SNIP is prepared and tabulated annually by Scopus.

 

CiteScore

Elsevier’s CiteScore is calculated using the Scopus database and uses a broader base of documents and publications (including articles, reviews, conference papers, book chapters, and data papers) and over a greater timespan (4 years). The CiteScore is calculated by taking the total number of citations received by peer-reviewed documents published over 4 years and dividing it by the total number of documents published. CiteScore is paired with percentiles and quartiles, making it easier to see if a medical journal sits in the top 10% (90th percentile) of its sub-discipline.

 

SCImago Journal Rank (SJR)

The SJR is a prestige-based metric designed to evaluate the quality and authority of medical publications rather than just counting how many times they are cited. SCImago uses weighted citation data from the SCImago Journal & Country Rank portal. Citations are counted over a 3­year period and journals within specific disciplines are ranked and divided into 4 quartiles (where Q1 represents the top 25% of journals within a discipline).

 

Eigenfactor

As with the SJR, citations are weighted so that a citation from a prestigious, highly cited journal is given more weight than a citation from a lesser-known journal. The Eigenfactor tracks citations over a 5-year period. The scores of all journals within a discipline in the JCR network are scaled so that they sum up to 100. Therefore, if a journal has an Eigenfactor of 0.05, it means it contains 0.05% of the total citation traffic across the entire network.

 

Indexing

High-quality bibliographic databases (such as MEDLINE/PubMed, Scopus, or Embase) index and organize journals to improve searchability. Part of the process of indexing includes an evaluation for journal quality to ensure that the journal meets strict editorial, ethical, and peer-review standards. Indexed journals adhere to internationally accepted standards and guidelines, such as the Committee on Publication Ethics (COPE) or the International Committee of Medical Journal Editors (ICMJE).

 

Article-Level Metrics

A number of tools exist to help readers assess the quality of individual studies and articles. For example:

• Risk-of-bias tools: These assess for errors or shortcomings that affect a study’s results. For example, the Cochrane RoB 2 tool is the gold standard for randomized controlled trials (RCTs), while the Newcastle-Ottawa Scale (NOS) is used for non-randomized observational studies.
• Critical appraisal checklists: Standardized questionnaires used by clinicians and researchers to evaluate the trustworthiness, validity, rigorousness, and clinical relevance of research articles. Examples include the Critical Appraisal Skills Programme (CASP) checklists, the Joanna Briggs Institute (JBI) Critical Appraisal Tools, the Consolidated Standards of Reporting Trials (CONSORT) checklist, and the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist.
• The Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach: A systematic framework used to rate the certainty of evidence and the strength of clinical recommendations in medical articles and guidelines.

 

How To Choose the Right Journal for a Medical Manuscript

At The Med Writers, we frequently help researchers, academics, and clinicians prepare their manuscript and see it through the writing, submission, peer-review, and publication process. We stress the importance of journal selection at the beginning of manuscript preparation so that we can submit a “pre-submission inquiry” and so that formatting and submission requirements can be built into the manuscript from the start.

Evaluating the quality and impact of the candidate journals is part of the process of gathering a list of potential journals and then selecting the right one, but our approach includes a number of factors.

 

Indexing

Ensuring the journal is indexed is a quick test of reliability. PubMed indexing is particularly important; journals indexed on PubMed can generally be accepted as reputable and peer-reviewed.

 

Impact factor

In general, manuscripts should be submitted to the highest quality journal that is likely to publish the manuscript. As discussed in this article, the journal’s IF underscores how influential it is, and there are other markers of journal quality and prestige that must also be looked at. Higher-impact journals typically expect substantial innovative and novel subject matter, rigorous methodology, clear statistical power, transparent reporting, and findings with broad implications.

 

Define the paper’s principal contribution

Authors should state in a sentence or two what is new or different in the article, why it matters, and who would be interested.

 

Match the journal’s scope

Journals all overtly state their scope, but it helps to further research the journal’s aims, recent issues, article types, and editorials. As well, many journals prefer a certain study type (e.g., randomized trial, observational study, case report). Some journals prefer articles that are either clinically oriented or research oriented. Many do not state this directly, but this can be determined by looking at recently published articles.

 

Compare the intended readership

General readership versus a targeted audience is the principal question. General readership journals cover a wide variety of topics and are used by a broad audience. Targeted journals, on the other hand, publish articles limited to a particular specialty or subspecialty, and have a much narrower and focused readership. General readership journals are usually more selective in article selection, preferring those with a broad-based appeal, so authors are generally better off submitting to a targeted journal in their area of research or practice.

 

Submission fees

Journals are increasingly charging a submission fee, and the fee may be substantial (up to $11,000 USD in some cases). These fees are generally charged after peer review and acceptance, but there are also less-reputable “open access” journals that charge an up-front fee for submission. These “predatory journals” are seldom indexed on PubMed and should be avoided. Authors should be aware of submission fees prior to journal selection.

 

Practical requirements

Journals are generally very specific about technical and practical requirements, which may affect submission feasibility. These should align with the author’s intentions, and may include the following:

• Word limits;
• Figure allowances;
• Data-sharing requirements;
• Reporting checklists;
• Preprint policies;
• Publication timelines; and
• Funding mandates.

 

How The Med Writers Can Support Journal Selection

The preparation, submission and review process can be intimidating and time-consuming for authors. At The Med Writers, we can help authors through part or all of the process, lightening the load, reducing your stress, and increasing the likelihood of publication. Our involvement may include the following:

• Assessing the strength and publishable contribution of a study.
• Identifying journals aligned with the manuscript’s specialty and article type.
• Developing a ranked submission strategy and backup cascade.
• Comparing and selecting a journal for submission and several alternatives.
• Preparing manuscripts according to journal requirements.
• Submitting a polished manuscript.
• Responding to reviewers and peer review.
• Applying the appropriate reporting guideline.
• Reformatting and retargeting manuscripts in the case of rejection.

 

The Bottom Line

The IF is an influential tool for comparing medical journals, but it should be understood as one data point rather than the final verdict on journal quality. The 2026 JCR shows that major general medical journals achieve exceptionally high citation rates: NEJM has a 2025 IF of 84.5, JAMA 65.4, and The BMJ 55.1. Leading specialty journals also hold considerable influence, including The Lancet Neurology at 54.6, The Lancet Gastroenterology & Hepatology at 39.1, and The Lancet Diabetes & Endocrinology at 36.3.

These figures are meaningful only when interpreted with an understanding of what the IF represents. The best journal is not always the one with the highest IF, particularly when selecting a journal for manuscript submission.

A rigorous, evidence-informed journal-selection strategy can reduce avoidable rejection, shorten the route to publication, and help high-quality medical research reach the people most equipped to use it.