Claude H. Organ Jr.
| Claude H. Organ Jr. | |
|---|---|
Claude H. Organ Jr. as featured in the NLM Opening Doors exhibit | |
| Born | October 16, 1926 Marshall, Texas, U.S. |
| 💀Died | June 18, 2005 (aged 78) Oakland, California, U.S.June 18, 2005 (aged 78) |
| 🎓 Alma mater | Xavier University of Louisiana (BS) Creighton University School of Medicine (MD) |
| 💼 Occupation | |
| Known for | First African American to chair a surgery department at a predominantly white medical school; President of the American College of Surgeons |
| Notable work | A Century of Black Surgeons Gasless Laparoscopy with Conventional Instruments |
| 👩 Spouse(s) | Elizabeth Lucille Mays Organ (m. 1953–2005) |
| 👶 Children | 7 |
| 🏅 Awards | Distinguished Service Award, American College of Surgeons Full list |
| Signature | |
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Military service | |
|---|---|
| Allegiance | United States |
| Service/ | United States Navy Medical Corps |
| Years of service | 1957–1959 |
| Rank | Lieutenant Commander |
Claude H. Organ Jr. (October 16, 1926 – June 18, 2005) was an American academic surgeon, medical educator, and author. Organ was the first African American to chair a surgery department at a predominantly white medical school in the United States,[1] served as editor-in-chief of the Archives of Surgery,[2] and was a co-founder of the Society of Black Academic Surgeons (SBAS), later serving as its fourth president from 1995 to 1997.[3] He served as President of the American College of Surgeons from 2003 to 2004.[4][5][6]
Early life and education
Claude H. Organ Jr. was born in Marshall, Texas, and spent his childhood in the small town of Denison, Texas, where he attended public schools.[2] He was the middle of three children in a family that strongly valued education.[1] Both of his parents were college graduates, an uncommon achievement for African Americans in Texas at that time, and they placed a high priority on academic success for their children. This environment fostered Organ’s own dedication to learning from an early age.[2][1]
After graduating from high school, Organ enrolled at Xavier University of Louisiana, a historically Black Catholic institution in New Orleans. He earned his Bachelor of Science degree in 1948, and later attended Creighton University School of Medicine, where he received his M.D. in 1952. Organ completed his surgical training at Creighton and earned a Master of Surgery degree through research on how the duodenum reduces acid, working under scientific advisors C. M. Wilhmenj, M.D., and R. S. K. Lim, M.D.[5][7]
Before attending Creighton, Organ had initially applied to the University of Texas Medical School. His application was part of a legal strategy devised by his uncle, Charles Pemberton, who sought to challenge segregation in higher education. With the support of then–Speaker of the House Sam Rayburn, Pemberton appealed to the state’s obligation under the “separate but equal” doctrine, arguing that Texas must provide Organ a medical education as a resident. Since no separate medical school existed for Black students in Texas, the University of Texas ultimately agreed to pay his tuition at an out-of-state institution upon his acceptance elsewhere.[8][note 1]

Military service
From 1957 to 1959, Organ served as a Lieutenant Commander in the United States Navy Medical Corps (MC), assigned to Camp Pendleton during his active duty years.[9] He was among a dozen African American physicians commissioned as medical officers in the Navy during the post–World War II era, a time when racial integration in the military was still emerging in practice despite being mandated by Executive Order 9981 in 1948.[8] [note 2]

Military insignia
Below are the official insignia representing his military role and branch of service:
| Insignia | Description |
|---|---|
| Lieutenant Commander (O-4), United States Navy | |
| Seal of the U.S. Navy Medical Corps |
Career
After fulfilling his military commitment, Organ joined the faculty of Creighton University in 1960 and, in 1971, was appointed chair of the department of surgery—becoming the first African American to lead a surgical department at a predominantly white medical school. [1] He served in that role until 1982. He then became professor of surgery at the University of Oklahoma Health Sciences Center until 1988,[2] followed by a move to the University of California, San Francisco (UCSF), where he served as emeritus professor and established the UCSF East Bay Surgery Residency Program. [10]

Editorial career and publications
From 1989 to 2004, Organ served as editor-in-chief of the Archives of Surgery (now JAMA Surgery), one of the leading peer-reviewed journals in the field of general surgery.[11]
Under Organ’s leadership, Archives of Surgery maintained its high academic standing and was regularly indexed by the National Library of Medicine.[12] It was also promoted through the American College of Surgeons.[13] He retired from the editorship in 2004, having shaped the journal's identity for over 15 years.
Organ was also a prolific writer, authoring over 250 scholarly publications [2] on topics such as gastrointestinal surgery, health disparities, surgical education, and African-American history in medicine. Among his most influential works was the book A Century of Black Surgeons: The U.S.A. Experience (1987), which documented the legacy and struggles of African American physicians across generations.[14] [15]
Other notable books included Gasless Laparoscopy with Conventional Instruments (1993) and Abdominal Access in Open and Laparoscopic Surgery (1996), which contributed to minimally invasive surgical literature.[5]
Organ also wrote extensively about historical inaccuracies in medicine, including refuting the widely circulated myth that Dr. Charles R. Drew died because he was denied a blood transfusion.[5][note 3][note 4]
Leadership, mentorship, and educational philosophy
Organ co-founded the Society of Black Academic Surgeons (SBAS) in 1989 and served as its fourth president. [3] [6] The organization was created to promote diversity in academic surgery and provide mentorship to underrepresented minority faculty and trainees. His leadership helped establish SBAS as a national voice for equity in surgical education and recruitment.
He was elected president of the American College of Surgeons from 2003 to 2004 [4] , following his service as second vice-president from 2001 to 2002 [2]. In doing so, he became one of the few African American surgeons to lead the organization.
Given his commitment to surgical education, Organ declared that he wanted his presidential term to be remembered as “the year of the resident. [16]” During that year, he promoted the formation of the Resident and Associate Society of the American College of Surgeons (RAS-ACS) and championed a range of initiatives to elevate the role of young surgeons within the organization.
Organ advocated for incorporating non-technical skills—such as historical awareness, mentorship training, and academic writing—into surgical curricula. Through themed issues of Archives of Surgery, he spotlighted institutional models that integrated these elements, helping to establish new standards in surgical education.[16]
His leadership within the American College of Surgeons (ACS) reflected decades of dedicated service. A Fellow of the ACS since 1961,[2] Organ contributed extensively across multiple committees, including the Commission on Cancer (1979–1989), the Postoperative Care Committee (1986–1996), and the International Relations Committee (1991–2001). In 1999, he was honored with the College’s highest recognition, the Distinguished Service Award.[17] His longstanding commitment culminated in 2003 when he was installed as the ACS’s second African American president during the Clinical Congress convocation ceremony.[2]
Organ shared his expertise nationally and internationally through numerous invited lectures. He twice delivered the opening ceremony lecture at the Clinical Congress of the American College of Surgeons (1990 and 1995). Other invited lectures included the Archibald Watson Lecture in Australia, the Zollicoffer Lecture in North Carolina, and the Michael and Jamie Miller Lecture in South Africa.[2]
International outreach
In the late 1990s, Organ led delegations of Black surgeons to Nigeria through the Society of Black Academic Surgeons (SBAS), aiming to advance surgical education and collaboration across Africa. [18]
On January 28, 2003, the West African College of Surgeons (WACS) awarded Organ an honorary fellowship during its 43rd Annual Scientific Conference in Abuja, Nigeria. The distinction recognized his academic and professional contributions to surgery in West Africa, including his efforts to promote medical education, equity, and certification standards in the region. Organ traveled to Nigeria to accept the award in person and delivered a lecture addressing myths about the death of Dr. Charles Drew. [18][note 4]
He continued to mentor medical students and residents affiliated with the West African College of Surgeons (WACS) through lectures and visits into the early 2000s. He had planned to participate in the 46th Annual Scientific Conference in Ghana but died before the event. [18]

Concerned citizen
In his 2003 presidential address to the American College of Surgeons, Organ emphasized the surgeon’s responsibility to society beyond the operating room. He encouraged new Fellows to pursue a broader sense of purpose rooted in community involvement, social awareness, and institutional service. His remarks underscored the idea that systemic issues—such as poverty, hatred, and injustice—affect the well-being of all, not just the marginalized.[5]
Organ’s civic engagement extended across multiple organizations. He served as president of the Urban League of Omaha and was a board member of Boys Town. From 1972 to 1974, he directed the National Catholic Conference for Human Justice, and he was a trustee of both Howard University and Meharry Medical College.[2]

Death, tributes, and legacy
Claude H. Organ Jr. died on June 18, 2005, at the age of 78. [19]
According to Thomas R. Russell, Organ was widely regarded as a skilled educator, compassionate surgeon, respected leader, and tireless advocate for greater representation of minorities in medicine.
— Archives of Surgery (2005) [20]
Multiple awards, lectureships, and institutions named in his honor:
- Claude H. Organ Jr. Traveling Fellowship – A $5,000 professional development award co-sponsored by the Society of Black Academic Surgeons (SBAS), Association of Women Surgeons (AWS), and National Medical Association (NMA), designed to support early-career academic surgeons in visiting educational institutions or attending surgical meetings.[21]
- Claude H. Organ Jr. Resident Award – Presented annually at the SBAS meeting to the top three resident presenters, honoring Organ’s dedication to surgical education and young physician development.[22]
- Claude H. Organ Jr. Memorial Lectureship – Hosted by the Southwestern Surgical Congress, this lectureship commemorates Organ’s contributions to surgical scholarship and mentorship.[23]
- UCSF East Bay Surgery Residency – The residency program he helped build at the University of California, San Francisco continues to train new generations of surgeons under the values, curriculum, and leadership framework that Organ established.[2]
Impact and legacy in Black medical history
Claude H. Organ Jr. is widely regarded as one of the most influential African American figures in academic surgery. His pioneering role as the first Black department chair in surgery at a predominantly white medical school has drawn comparisons to other historic medical trailblazers such as Charles R. Drew and Augustus A. White. [24] [25] [26]
As a mentor and leader, Organ's influence extended beyond technical training. He helped institutionalize academic pathways for underrepresented minorities in surgery and played a central role in the foundation of the Society of Black Academic Surgeons (SBAS).[23]
The National Medical Association and SBAS have both recognized Organ not only as a skilled surgeon and educator, but also as a civil rights-era reformer who helped break barriers in academic medicine while mentoring a generation of Black physicians.
— National Medical Association, 2005[27]
His life and work are frequently cited in scholarship on African American contributions to medical history, and his publications—particularly “A Century of Black Surgeons” - are considered foundational texts documenting Black achievement in American surgery.[28]
Personal life
Organ was married to Elizabeth (Betty) Lucille Mays Organ for 52 years, until his death in 2005. They had seven children: Brian, a general surgeon; Gregory, a pediatric surgeon; Paul, a psychiatrist; Claude III, a bank executive; David, a geography professor; Sandra, a former principal dancer and founder of the Sandra Organ Dance Company; and Rita, a museum curator. He was also survived by ten grandchildren, his sister Claudesta Gould, and his brother Henry Organ Sr. [29]
In popular culture

Claude H. Organ Jr. was included in the U.S. National Library of Medicine’s exhibit Opening Doors: Contemporary African American Academic Surgeons, which profiled African American physicians in academic surgery.[6][30]
His books, A Century of Black Surgeons and its sequel, are cited in historical and medical literature related to race and medicine. His name appears in programs and awards issued by the American College of Surgeons and the Society of Black Academic Surgeons (SBAS), including the Claude H. Organ Jr., MD, FACS Traveling Fellowship, which supports early-career academic surgeons.[21][2]

Awards, honors, leadership roles, and fellowships
| Award | Organization | Year | Notes | Citation |
|---|---|---|---|---|
| Nina Starr Braunwald Award | Association of Women Surgeons | 1993 | Advocacy for women in surgery | [31] |
| Claude H. Organ Jr. Basic Science Lecture | Southwestern Surgical Congress | 1995 | Named in his honor | [2] |
| Distinguished Service Award | American College of Surgeons | 1999 | College's highest honor | [17] |
Leadership roles
| Position | Organization | Years | Citation |
|---|---|---|---|
| National Director | Alpha Omega Alpha Honor Medical Society | 1979–1989 | [5][10] |
| President | Southwestern Surgical Congress | 1984 | [2][10] |
| Chair | American Board of Surgery | 1984–1986 | [5][10] |
| President | Society of Black Academic Surgeons | 1995–1997 | [3] |
| President | Western Surgical Association | 2002 | [2][10] |
| Second Vice President | American College of Surgeons | 2001–2002 | [2][10] |
| President | American College of Surgeons | 2003–2004 | [2][10] |
Honorary fellowships
| Organization | Country | Year | Citation |
|---|---|---|---|
| Royal College of Surgeons of England | United Kingdom | — | [5] |
| Royal College of Surgeons of Edinburgh | United Kingdom | — | [5] |
| Royal Australasian College of Surgeons | Australia | — | [5] |
| Royal College of Surgeons of South Africa | South Africa | — | [5] |
| Association of Surgeons of Great Britain and Ireland | United Kingdom | — | [5] |
| West African College of Surgeons | West Africa | 2003 | [18] |
Honorary degrees
| Institution | Country | Degree Type | Citation |
|---|---|---|---|
| Xavier University of Louisiana | United States | Honorary Doctor of Science | [5] |
| University of Nebraska–Lincoln | United States | Honorary Doctor of Science | [5] |
| University of Athens | Greece | Honorary Doctorate | [5] |
Further reading
| Year | Title | Publisher | ISBN |
|---|---|---|---|
| 1987 | A Century of Black Surgeons: The U.S.A. Experience (Two volumes) Co-author: Margaret M. Kosiba |
Norman Publishing | 9780930405809 |
| 1993 | Gasless Laparoscopy with Conventional Instruments: The Next Phase in Minimally Invasive Surgery Co-author: R. Stephen Smith, M.D. |
Norman Publishing (Surgical Innovations No. 1) | 9780930405618 |
| 1996 | Abdominal Access in Open and Laparoscopic Surgery Editors: Edmund K. M. Tsoi & Claude H. Organ Jr. |
John Wiley & Sons | 9780471133520 |
| Year | Title | Author(s) | Source / Publisher | Notes |
|---|---|---|---|---|
| 2000 | "Mentoring: More than Passing the Buck" | Claude H. Organ Jr. | Archives of Surgery, Vol. 135, pp. 889–890 | — |
| 2005 | "Claude H. Organ Jr, MD (1926–2005)" | Thomas R. Russell | Archives of Surgery, Vol. 140(11), pp. 1027–1029 jamanetwork.com | Obituary |
| 2005 | "Archives of Surgery: A Tribute to Claude H. Organ, Jr, MD" | Temidayo O. Ogundiran | Archives of Surgery, Vol. 140(4), pp. 381–382 jamanetwork.com | Tribute |
| 2005 | "Claude H. Organ Jr, MD (1926–2005)" | Francis D. Moore | JAMA Surgery, Vol. 140(8), pp. 772–773 jamanetwork.com | Remembrance |
| 2019 | Seeing Patients: A Surgeon’s Story of Race and Medical Bias | Augustus A. White and David Chanoff | Harvard University Press. ISBN 9780674241374 | Includes references to Organ’s legacy |
| 2021 | Black Surgeons and Surgery in America | Don K. Nakayama (ed.) | American College of Surgeons. ISBN 978-1-7369212-1-0 scholaris.ca | Includes historical profile of Organ and Black surgical pioneers |
Timeline
Legend
Click to expand timeline
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October 16, 1926 – Born in Marshall, Texas. ↓ 1948 – Graduated with a B.S. from Xavier University of Louisiana. ↓ 1952 – Earned M.D. from Creighton University School of Medicine. ↓ 1953 – Married Elizabeth Lucille Mays; they later had seven children. ↓ 1957–1959 – Served as lieutenant commander in the United States Navy Medical Corps. ↓ 1960 – Joined faculty of Creighton University. ↓ 1971 – Appointed chair of surgery at Creighton; became first African American to chair a surgery department at a predominantly white medical school. ↓ 1979–1989 – National director, Alpha Omega Alpha Honor Medical Society. ↓ 1984–1986 – Chairman, American Board of Surgery. ↓ 1988 – Joined University of California, San Francisco (UCSF); helped found East Bay Surgery Residency Program. ↓ 1989–2004 – Editor-in-chief of Archives of Surgery. ↓ 1989 – Co-founded Society of Black Academic Surgeons (SBAS); served as its first president. ↓ 1993 – Received Nina Starr Braunwald Award from the Association of Women Surgeons. ↓ 1999 – Received Distinguished Service Award from American College of Surgeons. ↓ 2003–2004 – Served as President of the American College of Surgeons. ↓ January 28, 2003 – Received honorary fellowship from the West African College of Surgeons in Abuja, Nigeria. ↓ June 18, 2005 – Died in Oakland, California at the age of 78. |
Notes
Early life and education
Texas medical schools were still segregated, and Black students faced separate enrollment and limited clinical opportunities. [note 1]
Military Service
In 2021, Navy Medicine recognized the legacy of racial integration in the Navy Medical Department, honoring the first African American physicians who broke barriers during segregation and helped open doors for future generations of Black medical professionals. [note 2]
Dr. Charles Drew
Organ addressed and refuted the widespread belief that Dr. Charles R. Drew was denied a blood transfusion following his 1950 car accident due to racial discrimination. In a 1981 editorial, he explained that this narrative lacked supporting evidence and contradicted the medical facts, pointing out that Drew was treated promptly at a white hospital and received appropriate care prior to his death.[note 4] [note 3]
- ↑ 1.0 1.1 "The Desegregation of UTMB". Clio. Retrieved July 15, 2025.
- ↑ 3.0 3.1 "Catalog ID 18514382". National Archives and Records Administration. Records of the Office of Speechwriting (Clinton Administration). Retrieved July 22, 2025.
- ↑ 4.0 4.1 4.2 Pilgrim, David (June 2004). "The Truth About the Death of Charles Drew". Jim Crow Museum of Racist Memorabilia. Ferris State University. Retrieved 2025-07-22.
See also
- Archives of Surgery
- American College of Surgeons
- University of California, San Francisco
- Creighton University School of Medicine
- Xavier University of Louisiana
- Association of Women Surgeons
- Royal College of Surgeons of England
- Desegregation in the United States
- Medical education in the United States
- Opening Doors: Contemporary African American Academic Surgeons
External links
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References
- ↑ 1.0 1.1 1.2 1.3 "Claude H. Organ Jr. attended Creighton University… first African American to chair a surgery department at a PWI in 1971". Charlottesville History & Architecture Museum (CHAMP). Archived from the original on October 1, 2023. Retrieved June 12, 2025.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 Russell, Thomas R. (November 2005). "Claude H. Organ, Jr". Archives of Surgery. 140 (11): 1027–1029. doi:10.1001/archsurg.140.11.1027-a. Retrieved July 14, 2025.
- ↑ 3.0 3.1 3.2 "Past Presidents". Society of Black Academic Surgeons. Retrieved July 27, 2025.
- ↑ 4.0 4.1 "Presidents, Executive Directors, and Presidential Addresses". American College of Surgeons. Retrieved July 27, 2025.
- ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 5.12 5.13 5.14 Moore, Francis D. (August 2005). "Claude H. Organ Jr, MD (1926–2005)". JAMA Surgery. 140 (8): 772–773. Archived from the original on June 15, 2021. Retrieved June 12, 2025.
- ↑ 6.0 6.1 6.2 "Biography: Claude H. Organ, Jr". National Library of Medicine: Opening Doors. Archived from the original on June 15, 2021. Retrieved June 12, 2025.
- ↑ Royal College of Surgeons of England. "Organ, Claude H." Lives of the Fellows. Retrieved June 12, 2025.
- ↑ DeFao, Janine (June 26, 2005). "Claude Organ – surgeon, medical educator". CT Insider. Retrieved July 22, 2025.
- ↑ 10.0 10.1 10.2 10.3 10.4 10.5 10.6 "Biography of Dr. Claude Organ". ATL-R. Society of Black Academic Surgeons. Retrieved July 29, 2025.
- ↑ Abbasi, Ali B.; Valderrama, Adriana; Decker, Hannah C.; Bongiovanni, Thomas; Wick, Elizabeth C. (February 1, 2025). "The Quality of Evidence Supporting Clinical Practice Guidelines in General Surgery: A Meta-analysis". JAMA Surgery. 160 (2): 226–227. doi:10.1001/jamasurg.2024.4751. PMC 11579889 Check
|pmc=value (help). PMID 39565614 Check|pmid=value (help). Retrieved July 20, 2025. Unknown parameter|pmc-embargo-date=ignored (help) - ↑ "Archives of Surgery (Chicago, Ill. : 1960)". National Library of Medicine Catalog. U.S. National Library of Medicine. Retrieved 2025-07-22.
- ↑ "ACS Archives". American College of Surgeons. Retrieved 2025-07-29.
- ↑ Organ, Claude H. Jr. (1993). A Century of Black Surgeons: The U.S.A. Experience. Norman Publishing. ISBN 9780930405656. Search this book on
- ↑ "Claude H. Organ, Jr". Opening Doors: Contemporary African American Academic Surgeons. U.S. National Library of Medicine. Retrieved July 29, 2025.
- ↑ 16.0 16.1 Moore, Francis D. “Claude H. Organ Jr, MD (1926–2005).” *JAMA Surgery*, vol. 140, no. 8 (August 2005): pp. 772–773. doi:10.1001/jamasurg.140.8.772. Retrieved July 27, 2025.
- ↑ 17.0 17.1 "Distinguished Service Award Recipients – American College of Surgeons". American College of Surgeons. Retrieved June 12, 2025.
- ↑ 18.0 18.1 18.2 18.3 Ogundiran, Temidayo (2005). "Archives of Surgery: A Tribute to Claude H. Organ, Jr, MD". Archives of Surgery. 140 (4): 381–382. doi:10.1001/archsurg.140.4.381 (inactive August 13, 2025). Retrieved July 20, 2025.
- ↑ Payton, Brenda (2005-06-22). "Claude Organ, acclaimed surgeon, dies". Oakland Tribune. p. 22. Retrieved 2025-07-14 – via Newspapers.com.
- ↑ Ogundiran, Temidayo O. (April 2004). "Archives of Surgery: A Tribute to Claude H. Organ, Jr, MD". Archives of Surgery. 139 (4): 381–382. doi:10.1001/archsurg.139.4.381 (inactive August 13, 2025). Retrieved July 21, 2025.
- ↑ 21.0 21.1 "Claude H. Organ Jr., MD, FACS Traveling Fellowship". American College of Surgeons. Retrieved July 14, 2025.
- ↑ "2023 Annual SBAS Awards: Claude H. Organ, Jr., MD Award". Society of Black Academic Surgeons. November 3, 2023. Retrieved July 14, 2025.
- ↑ 23.0 23.1 "Claude H. Organ, Jr. Memorial Lectureship". Southwestern Surgical Congress. Retrieved July 20, 2025.
- ↑ White, Augustus A.; Chanoff, David (2019). Seeing Patients: A Surgeon's Story of Race and Medical Bias (With a new preface ed.). Cambridge, MA: Harvard University Press. ISBN 9780674241374. Retrieved July 20, 2025. Search this book on
- ↑ Ko, Michelle (2020). "Racism In My Medical Education". Health Affairs. 39 (6): 1087–1091. doi:10.1377/hlthaff.2019.00743. PMID 32479239 Check
|pmid=value (help). Retrieved July 20, 2025. - ↑ White, Augustus A.; Chanoff, David (2019). Seeing Patients: A Surgeon's Story of Race and Medical Bias (With a new preface ed.). Cambridge, MA: Harvard University Press. ISBN 9780674241374. Retrieved July 21, 2025. Search this book on
- ↑ Arrington, M. I. (August 2005). "In Memoriam: Claude H. Organ Jr., MD". Journal of the National Medical Association. 97 (8): 1172–1173. PMC 2569349.
- ↑ Organ, Claude H. Jr. (1993). A Century of Black Surgeons: The U.S.A. Experience. Norman Publishing. ISBN 9780930405656. Search this book on
- ↑ "Claude Organ Obituary". Legacy.com. San Francisco Chronicle. June 23, 2005. Retrieved July 28, 2025.
- ↑ "Exhibit Highlights Prominent African-American Surgeons". CUIMC News. Columbia University Irving Medical Center. 2014-04-17. Retrieved 2025-07-22.
- ↑ "Braunwald Past Winners" (PDF). Association of Women Surgeons Foundation. Archived from the original (PDF) on January 1, 2025. Retrieved June 12, 2025.
- ↑ "Claude H. Organ Jr., M.D." National Library of Medicine. U.S. National Library of Medicine. Retrieved July 22, 2025.
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