{ "id": "epanq67y6d", "slug": "caduceus-as-a-symbol-of-medicine", "title": "Caduceus as a symbol of medicine", "updated": "2026-10-21", "topic_path": [ { "id": "life", "label": "Life and health", "api_url": "https://www.edgepedia.org/api/v1/topics/life" }, { "id": "life.health", "label": "Human health and medicine", "api_url": "https://www.edgepedia.org/api/v1/topics/life.health" } ], "geo": [ { "id": "geo.us.t1800.life.health", "label": "United States · 1800 to 1945: Human health and medicine", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.us.t1800.life.health", "path": [ { "id": "geo.us", "label": "United States", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.us" }, { "id": "geo.us.t1800", "label": "United States · 1800 to 1945", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.us.t1800" }, { "id": "geo.us.t1800.life", "label": "Life and health", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.us.t1800.life" }, { "id": "geo.us.t1800.life.health", "label": "Human health and medicine", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.us.t1800.life.health" } ] }, { "id": "geo.weu.tbc.life", "label": "Western Europe · Before 500 BC: Life and health", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.weu.tbc.life", "path": [ { "id": "geo.weu", "label": "Western Europe", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.weu" }, { "id": "geo.weu.tbc", "label": "Western Europe · Before 500 BC", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.weu.tbc" }, { "id": "geo.weu.tbc.life", "label": "Life and health", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.weu.tbc.life" } ] } ], "excerpt": "Caduceus as a symbol of medicine: the two-snake winged staff of Hermes, adopted by the US Army Medical Corps in 1902, versus the true medical emblem, the single-snake rod of Asclepius.", "snippet": "Caduceus as a symbol of medicine: the two-snake winged staff of Hermes, adopted by the US Army Medical Corps in 1902, versus the true medical emblem, the single-snake rod of Asclepius.", "node": "life.health", "markdown": "# Caduceus as a symbol of medicine\n\nThe caduceus, a winged staff entwined by two snakes, is widely used in the United States as an emblem of medicine, although it is historically the staff of the Greek god Hermes ([Mercury](https://www.edgepedia.org/mercury-mythology) in Roman religion), a symbol of peace, neutrality, and commerce rather than of healing.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) The traditional emblem of medicine is the rod of [Asclepius](https://www.edgepedia.org/asclepius), a wingless staff with a single serpent, which has been associated with medicine for roughly 2,400 years.[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/) The caduceus became a popular medical symbol only in the modern era, chiefly after its adoption by the U.S. Army Medical Corps in 1902.[3](https://pubmed.ncbi.nlm.nih.gov/12693891/)\n\n| Key fact | Detail |\n|---|---|\n| Design | Two snakes winding up a central staff, usually surmounted by wings; the rod of Asclepius has one snake and no wings[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) |\n| Original meaning | Herald's wand of Hermes (Mercury), messenger of the gods; a mark of peaceful dispute resolution and, in time, of commerce[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) |\n| Entry into medicine | Modern design derived from the printer's mark of a popular 19th-century medical publisher; popularized after adoption by the U.S. Army Medical Corps in 1902[3](https://pubmed.ncbi.nlm.nih.gov/12693891/) |\n| Institutional use | The World Health Organization, the American Medical Association (since 1910), and the American Osteopathic Association use the single-snake rod of Asclepius[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/) • [4](https://journalofethics.ama-assn.org/article/what-makes-good-physician-asclepius-and-rhetoric-ai/2025-12) • [5](https://www.ohio.edu/medicine/news-center/blog/aesculapius-vs-caduceus) |\n| Awareness | In a 2014 Indian survey of 300 doctors and medical students, only 6% knew the rod of Asclepius is the true emblem of healing[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/) |\n\n## The two symbols and their mythological origins\n\nThe word caduceus comes from a Greek word meaning herald's wand, and refers to the staff carried by Hermes, the messenger of the gods and protector of travelers, shepherds, and merchants, as well as of thieves, liars, and gamblers. In myth, Hermes threw his staff between two fighting snakes, which stopped their battle and wrapped themselves around it; the staff and two snakes became a symbol of resolving disputes peacefully and later a mark of commerce.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) In its primary form the caduceus represents peace, neutrality, and commerce, and appears on coats of arms and flags in that meaning.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/)\n\nThe rod of Asclepius belongs to Asclepius (Aesculapius to the Romans), the Greek god of healing and son of [Apollo](https://www.edgepedia.org/apollo). He is depicted as a bearded man leaning on a heavy staff with a single snake coiled around it, and his cult, centered on hospital-like sanctuaries such as [Epidaurus](https://www.edgepedia.org/epidaurus), spread through Greece from the 5th century BCE.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) The snake's association with healing is usually explained by its periodic shedding of skin, a natural image of renewal and restored health.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) An alternative origin theory holds that the snake on the staff represents the guinea worm (*[Dracunculus medinensis](https://www.edgepedia.org/dracunculus-medinensis)*), which healers in ancient Greece and Egypt, according to the Ebers papyrus (c. 1550 BCE), wound around a stick to extract it whole from a patient's skin.[6](https://applications.emro.who.int/imemrf/43/Arch-Iran-Med-2020-23-8-573-577-eng.pdf)\n\n## How the caduceus entered medicine\n\n**Early appearances were marginal.** Before the 19th century the caduceus saw limited use in a medical context. In antiquity it represented Hermes and Mercury, while the rod of Asclepius was the emblem associated with medicine; when early printers placed a caduceus on medical documents, this most likely signaled the printer's role as a messenger or scribe under Mercury's patronage rather than medical content.[7](https://www.crossfit.com/health/the-caduceus-versus-the-rod-of-asclepius-as-a-symbol-of-medicine) From the 16th century the caduceus circulated as a symbol of alchemy and pharmacy, a link running through the [Hermetica](https://www.edgepedia.org/hermetica) texts and the use of mercury in pharmaceutical preparation.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/) In 1792 the surgeon dentist Josiah Flagg Jr. used a caduceus in an advertisement in the Boston Columbian Sentinel.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/)\n\n**The modern medical caduceus has a printer's mark at its root.** In their 2003 study in *Annals of Internal Medicine*, Wilcox and Whitham trace the medical caduceus's design to the printer's device used by John Churchill, a prominent London-based 19th-century medical publisher whose title pages bore the emblem beginning in 1844, rather than to Hermes's ancient caduceus; because Churchill also printed the rod of Asclepius on certain works, he apparently did not mean the caduceus to stand for medicine.[3](https://pubmed.ncbi.nlm.nih.gov/12693891/) • [8](https://museumofhealthcare.blog/snakes-mistakes-and-mythology-the-use-of-the-rod-of-asclepius-and-the-caduceus-in-modern-medicine/)\n\n**American military adoption made it popular.** The caduceus began appearing on the chevrons of U.S. Army hospital stewards in the 1850s, was later placed on the seal of the Marine Hospital Service, and in 1902 was designated the insignia of the Army Medical Department.[7](https://www.crossfit.com/health/the-caduceus-versus-the-rod-of-asclepius-as-a-symbol-of-medicine) Contemporary reports attribute the choice partly to aesthetics and partly to ignorance of the distinction between the two staffs. Col. John R. van Hoff argued there was no confusion: in its Mercury association the caduceus symbolized merchant, and so non-combatant, status, fitting for men who supported medical efforts without being practitioners. After World War I the Navy Hospital Corps adopted it as well.[7](https://www.crossfit.com/health/the-caduceus-versus-the-rod-of-asclepius-as-a-symbol-of-medicine) Whatever the intent, use by a government medical body popularized the caduceus as a medical emblem globally.[1](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/)\n\n## Institutional corrections and current usage\n\nMajor health organizations have generally settled on the single-snake staff. The World Health Organization and the [Medical Council of India](https://www.edgepedia.org/medical-council-of-india) use the rod of Asclepius in their logos, as do the [American Medical Association](https://www.edgepedia.org/american-medical-association) and the American Osteopathic Association.[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/) • [5](https://www.ohio.edu/medicine/news-center/blog/aesculapius-vs-caduceus) The AMA's own record shows the progression: founded in 1847, it adopted its first logo in 1898, added a red cross in 1903, and in 1910 officially incorporated the rod of Asclepius, its Committee on Insignia declaring that \"the true ancestral symbol of the healing art is the knotty pine and the serpent of Aesculapius.\"[4](https://journalofethics.ama-assn.org/article/what-makes-good-physician-asclepius-and-rhetoric-ai/2025-12) Many U.S. medical schools have likewise replaced the caduceus in their crests.[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/)\n\nThe U.S. military itself now presents a mixed picture. The current Army Medical Department and U.S. Air Force medical insignias bear the rod of Asclepius, and the 2014 AMEDD Regimental Distinctive Insignia places the Staff of Aesculapius on its shield, while the 1902 Medical Corps branch plaque with its caduceus has never been corrected and is thought to have spawned further mistaken uses, including the seal and flag of the U.S. Surgeon General.[7](https://www.crossfit.com/health/the-caduceus-versus-the-rod-of-asclepius-as-a-symbol-of-medicine) • [9](https://www.army.mil/article/138785/The__New__Army_Medical_Department__AMEDD__Regimental_Distinctive_Insignia/) • [4](https://journalofethics.ama-assn.org/article/what-makes-good-physician-asclepius-and-rhetoric-ai/2025-12)\n\n## How common is each symbol, and how well is the distinction known?\n\nSurveys document both the confusion and the institutional split. A 1992 survey found 76% of U.S. hospitals misusing the caduceus as a medical symbol.[10](https://academic.oup.com/pmj/article/100/1186/613/7301419) A cross-sectional study of Internet emblems of 482 medical and health professional schools in the United States, Puerto Rico, and Canada (2013 to 2015) found that 107 emblems (22.2%) displayed only the traditional asklepian and 205 (42.5%) any version of it; adjusting for region and school longevity, medical schools were 7.7 times more likely than other health professional schools to display the traditional caduceus, a result the authors called an educational opportunity for the profession.[11](https://mededu.jmir.org/2016/1/e6) [Knowledge](https://www.edgepedia.org/knowledge) among practitioners is also limited: in the 2014 Indian study of 300 doctors and medical students, only 6% identified the rod of Asclepius as the correct emblem of healing.[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/)\n\n**A minority view defends the caduceus.** Most scholars treat its medical use as a mistake dating to 1902, but some authors note that the physician's role is not only cure. In palliative situations where no treatment exists, the physician guides the patient much as Hermes guided souls, and an essay in the *Archives of Iranian Medicine* argues the caduceus can be read as a symbol of that accompanying, comfort-giving side of medicine.[6](https://applications.emro.who.int/imemrf/43/Arch-Iran-Med-2020-23-8-573-577-eng.pdf) Others have proposed replacing both Greek symbols with indigenous emblems, such as the Simurgh, a benevolent mythical flying creature of Persian tradition.[2](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/)\n\n## References\n\n1. [The symbols of medicine: a story of snakes, staffs and Greek gods, Science Museum Group Blog (Sabrina Ruffino Giummara, 2023)](https://blog.sciencemuseumgroup.org.uk/the-symbols-of-medicine/)\n2. [Medical Symbols in Practice: Myths vs Reality, Journal of Pharmacy & Bioallied Sciences (PMC4190767)](https://pmc.ncbi.nlm.nih.gov/articles/PMC4190767/)\n3. [Wilcox RA, Whitham EM. The symbol of modern medicine: why one snake is more than two. Ann Intern Med. 2003;138(8):673-677 (PubMed)](https://pubmed.ncbi.nlm.nih.gov/12693891/)\n4. [What Makes a Good Physician? Asclepius and the Rhetoric of AI, AMA Journal of Ethics](https://journalofethics.ama-assn.org/article/what-makes-good-physician-asclepius-and-rhetoric-ai/2025-12)\n5. [The Staff of Aesculapius vs. the caduceus: What's the difference? Ohio University Heritage College of Osteopathic Medicine](https://www.ohio.edu/medicine/news-center/blog/aesculapius-vs-caduceus)\n6. [Katsaras G, et al. Caduceus: A Medical Symbol of Deception, or Is There More to That? Arch Iran Med. 2020;23(8):573-577](https://applications.emro.who.int/imemrf/43/Arch-Iran-Med-2020-23-8-573-577-eng.pdf)\n7. [The Caduceus Versus the Rod of Asclepius as a Symbol of Medicine, CrossFit (March 16, 2019)](https://www.crossfit.com/health/the-caduceus-versus-the-rod-of-asclepius-as-a-symbol-of-medicine)\n8. [Snakes, Mistakes, and Mythology! The Use of the Rod of Asclepius and the Caduceus in Modern Medicine, Museum of Health Care Blog](https://museumofhealthcare.blog/snakes-mistakes-and-mythology-the-use-of-the-rod-of-asclepius-and-the-caduceus-in-modern-medicine/)\n9. [The \"New\" Army Medical Department (AMEDD) Regimental Distinctive Insignia, U.S. Army (2014)](https://www.army.mil/article/138785/The__New__Army_Medical_Department__AMEDD__Regimental_Distinctive_Insignia/)\n10. [Caduceus vs. Rod of Asclepius: A Serpentine Dilemma in Medical Iconography, Postgraduate Medical Journal (Oxford Academic)](https://academic.oup.com/pmj/article/100/1186/613/7301419)\n11. [Hamann C, Martelon MK. Branding Asklepios and the Traditional and Variant Serpent Symbol Display Among Health Professional Schools in the United States, Puerto Rico, and Canada. JMIR Medical Education. 2016;2(1):e6](https://mededu.jmir.org/2016/1/e6)\n\n---\n*Topic: Encyclopedia › Life and health › Human health and medicine*\n\n*Initially written Sep 17, 2026 · Reviewed: Sep 17, 2026; Sep 18, 2026; Sep 30, 2026; Oct 21, 2026 · Edited: Sep 18, 2026; Sep 30, 2026; Oct 21, 2026 · Last review: Oct 21, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n", "same_as": [], "url": "https://www.edgepedia.org/caduceus-as-a-symbol-of-medicine", "markdown_url": "https://www.edgepedia.org/caduceus-as-a-symbol-of-medicine.md", "license": { "name": "Edgepedia Community License 1.0", "url": "https://www.edgepedia.org/edgepedia/license", "summary": "Free with credit, commercial use included. AI training is open to everyone. 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