Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments with related expertise Endocrine Surgery in Rochester Oncology (Medical) Otolaryngology (ENT)/Head and Neck Surgery Plastic Surgery Surgery Areas that research this procedure Otolaryngology — Head and Neck Surgery Research Doctors who perform this procedure Edit search filters close Narrow your search By location Jacksonville, FL By last name There are no doctors whose last name begins with the letter A A There are no doctors whose last name begins with the letter B B Find a doctor whose last name begins with the letter C C There are no doctors whose last name begins with the letter D D Find a doctor whose last name begins with the letter E E Find a doctor whose last name begins with the letter F F There are no doctors whose last name begins with the letter G G Find a doctor whose last name begins with the letter H H There are no doctors whose last name begins with the letter I I active Find a doctor whose last name begins with the letter J J There are no doctors whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L Find a doctor whose last name begins with the letter M M There are no doctors whose last name begins with the letter N N Find a doctor whose last name begins with the letter O O Find a doctor whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q There are no doctors whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S There are no doctors whose last name begins with the letter T T There are no doctors whose last name begins with the letter U U There are no doctors whose last name begins with the letter V V There are no doctors whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-1 out of 1 doctors available Last Name Initial: J Jeffrey R. Janus, M.D. Otolaryngologist Jacksonville, FL Areas of focus: Transoral robotic surgery, Parotid gland surgery, Parathyroidectomy, Thyroidectomy, Robotic surgery, Microvascular surg...ery, Head and neck reconstruction, Head and neck cancer surgery, Neck surgery, Oropharyngeal cancer, Mouth cancer, Thyroid cancer, Throat cancer, Salivary gland tumor, Soft palate cancer, Parathyroid adenoma Show more areas of focus for Jeffrey R. Janus, M.D. By Mayo Clinic Staff Request an appointment About April 07, 2026 PrintShow references Primary hyperparathyroidism. National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/endocrine-diseases/primary-hyperparathyroidism. Accessed July 29, 2022. Goldblum JR, et al. Parathyroid glands. In: Rosai and Ackerman's Surgical Pathology. 11th ed. Elsevier; 2018. https://www.clinicalkey.com. Accessed July 29, 2022. Jameson JL, et al. Surgical management of hyperparathyroidism. In: Endocrinology: Adult and Pediatric. 7th ed. Elsevier; 2016. https://www.clinicalkey.com. Accessed Aug. 1, 2022. Townsend CM Jr, et al. The parathyroid glands. In: Sabiston Textbook of Surgery: The Biological Basis of Modern Surgical Practice. 21st ed. Elsevier; 2022. https://www.clinicalkey.com. Accessed Aug. 1, 2022. AskMayoExpert. Primary hyperparathyroidism. Mayo Clinic; 2024. Elsevier Point of Care. Clinical Overview: Hyperparathyroidism. https://www.clinicalkey.com. Accessed April 15, 2025. Quarles D, et al. Refractory hyperparathyroidism and indications for parathyroidectomy in adult dialysis patients. https://www.uptodate.com/contents/search. Accessed April 15, 2025. Health Education & Content Services. Hyperparathyroidism: Overactive parathyroid glands. Mayo Clinic; 2024. Yip L, et al. Preoperative localization for parathyroid surgery in patients with primary hyperparathyroidism. https://www.uptodate.com/contents/search. Accessed April 15, 2025. General anesthesia. American Society of Anesthesiologists. https://www.asahq.org/madeforthismoment/anesthesia-101/types-of-anesthesia/general-anesthesia/. Accessed April 15, 2025. Medical review (expert opinion). Mayo Clinic. April 16, 2025. Related Hyperparathyroidism ParathyroidectomyAboutDoctors&Departments PRC-20428680 Tests & Procedures Parathyroidectomy