Overview
Dr. Fenner specializes in endocrinology. He treats various gland diseases as well as diabetes and high cholesterol. The services he provides include: obtaining a patient's medical history; performing physical exams; ordering, performing and interpreting lab and diagnostic tests; prescribing medications. He also serves as the chair of the endocrinology department at the University of South Dakota Sanford School of Medicine. Speaks: English.
Dr. Fenner is highly rated in 26 conditions, according to our data. His clinical expertise encompasses Hyperparathyroidism, Parathyroid Hyperplasia, Familial Isolated Hyperparathyroidism, and Type 2 Diabetes (T2D).
Dr. Fenner is board certified in American Board Of Internal Medicine: EndocrinologyAmerican Board Of Internal Medicine: Internal Medicine. He is actively involved in clinical research, co-authoring 1 peer reviewed article. Dr. Fenner is currently accepting new patients.
Specialties
Licenses
Board Certifications
Fellowships
Hospital Affiliations
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- OTHER MEDICARE
- OTHER MEDICARE PART D
- EPO
- HMO
- PPO
- MEDICARE SNP
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- POS
- PPO
- EPO
- HMO
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- EPO
- HMO
- PPO
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE PDP
- HMO
- OTHER COMMERCIAL
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE SNP
- HMO
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- HMO
- PPO
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- MEDICARE DISCOUNT CARD
- MEDICARE PDP
- OTHER MEDICARE
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
- HMO
- POS
Locations
1305 W. 18th St., Sioux Falls, SD 57117
Additional Areas of Focus
Dr. Fenner has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
Sanford Diabetes &Amp; Thyroid Clinic
Dr. Brandon Allard specializes in endocrinology and metabolism. He treats endocrine system disease, pituitary disease, adrenal disease, thyroid disease, metabolic bone disease and osteoporosis, hyperlipidemia, and diabetes. He provides these services: Speaks: English. Dr. Allard is highly rated in 34 conditions, according to our data. His clinical expertise encompasses Anaplastic Thyroid Cancer, Thyroid Cancer, Hyperparathyroidism, and Hypothyroidism. Dr. Allard is board certified in American Board Of Internal Medicine: Endocrinology. Dr. Allard is currently accepting new patients.
Avera Endocrinology & Diabetes — Dawley Farm
R Anel-Tiangco is an Endocrinologist practicing medicine in Sioux Falls, South Dakota. Dr. Anel-Tiangco is highly rated in 27 conditions, according to our data. Her clinical expertise encompasses Thyroid Nodule, Hereditary Paraganglioma-Pheochromocytoma Syndrome, Glomus Jugulare Tumor, and Thyroid Storm. Dr. Anel-Tiangco is board certified in American Board Of Internal Medicine; American Board Of Internal Medicine - Endocrinology, Diabetes & Metabolism. Dr. Anel-Tiangco is currently accepting new patients.
Avera McKennan Hospital & University Health Center
Dr. Longo is an endocrinologist at Avera Medical Group Endocrinology & Diabetes Sioux Falls. Dr. Longo is highly rated in 41 conditions, according to our data. His clinical expertise encompasses Type 1 Diabetes (T1D), Familial Isolated Hyperparathyroidism, Parathyroid Hyperplasia, and Neonatal Severe Hyperparathyroidism. Dr. Longo is board certified in American Board Of Internal Medicine; American Board Of Internal Medicine - Endocrinology, Diabetes & Metabolism. Dr. Longo is currently accepting new patients.
Frequently Asked Questions about Dr. Randall S. Fenner
How do I make an appointment with Dr. Randall S. Fenner?
You can book an appointment with Dr. Randall S. Fenner by calling their office at 605-328-8700. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. Randall S. Fenner a top-rated expert for Hyperparathyroidism?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. Randall S. Fenner is classified as an Distinguished expert for Hyperparathyroidism, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.
What conditions does Dr. Randall S. Fenner specialize in?
While Dr. Randall S. Fenner is a Endocrinology, they have specific expertise in Hyperparathyroidism, Parathyroid Hyperplasia, and Familial Isolated Hyperparathyroidism. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Endocrinology.
Does Dr. Randall S. Fenner participate in research or clinical trials?
Yes. Dr. Randall S. Fenner has published 1 articles and abstracts on conditions like Hyperparathyroidism. You can view a list of Dr. Randall S. Fenner's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.
Does Dr. Randall S. Fenner accept my insurance?
Dr. Randall S. Fenner accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 605-328-8700 to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Distinguished
- Familial Isolated HyperparathyroidismDr. Fenner isDistinguished. Learn about Familial Isolated Hyperparathyroidism.
- HyperparathyroidismDr. Fenner isDistinguished. Learn about Hyperparathyroidism.
- Parathyroid HyperplasiaDr. Fenner isDistinguished. Learn about Parathyroid Hyperplasia.
- Advanced
- Adrenal Insufficiency PediatricDr. Fenner isAdvanced. Learn about Adrenal Insufficiency Pediatric.
- Anaplastic Thyroid CancerDr. Fenner isAdvanced. Learn about Anaplastic Thyroid Cancer.
- Follicular Thyroid CancerDr. Fenner isAdvanced. Learn about Follicular Thyroid Cancer.
- Graves DiseaseDr. Fenner isAdvanced. Learn about Graves Disease.
- HyperthyroidismDr. Fenner isAdvanced. Learn about Hyperthyroidism.
- HypothyroidismDr. Fenner isAdvanced. Learn about Hypothyroidism.
- Medullary Thyroid CarcinomaDr. Fenner isAdvanced. Learn about Medullary Thyroid Carcinoma.
- Neonatal Severe Hyperparathyroidism
- Obesity in ChildrenDr. Fenner isAdvanced. Learn about Obesity in Children.
- Osteitis FibrosaDr. Fenner isAdvanced. Learn about Osteitis Fibrosa.
- OsteoporosisDr. Fenner isAdvanced. Learn about Osteoporosis.
- Papillary Thyroid CancerDr. Fenner isAdvanced. Learn about Papillary Thyroid Cancer.
- Peripheral NeuropathyDr. Fenner isAdvanced. Learn about Peripheral Neuropathy.
- Pituitary TumorDr. Fenner isAdvanced. Learn about Pituitary Tumor.
- Postmenopausal OsteoporosisDr. Fenner isAdvanced. Learn about Postmenopausal Osteoporosis.
- ProlactinomaDr. Fenner isAdvanced. Learn about Prolactinoma.
- Thyroid CancerDr. Fenner isAdvanced. Learn about Thyroid Cancer.
- Thyroid NoduleDr. Fenner isAdvanced. Learn about Thyroid Nodule.
- Thyroid StormDr. Fenner isAdvanced. Learn about Thyroid Storm.
- Toxic Nodular GoiterDr. Fenner isAdvanced. Learn about Toxic Nodular Goiter.
- Triple A SyndromeDr. Fenner isAdvanced. Learn about Triple A Syndrome.
- Type 1 Diabetes (T1D)Dr. Fenner isAdvanced. Learn about Type 1 Diabetes (T1D).
- Type 2 Diabetes (T2D)Dr. Fenner isAdvanced. Learn about Type 2 Diabetes (T2D).
- Experienced
- Addison's DiseaseDr. Fenner isExperienced. Learn about Addison's Disease.
- Adrenal Gland AdenomaDr. Fenner isExperienced. Learn about Adrenal Gland Adenoma.
- Autosomal Dominant HypocalcemiaDr. Fenner isExperienced. Learn about Autosomal Dominant Hypocalcemia.
- Deafness Hypogonadism SyndromeDr. Fenner isExperienced. Learn about Deafness Hypogonadism Syndrome.
- Diabetic NephropathyDr. Fenner isExperienced. Learn about Diabetic Nephropathy.
- Diabetic NeuropathyDr. Fenner isExperienced. Learn about Diabetic Neuropathy.
- Empty Sella SyndromeDr. Fenner isExperienced. Learn about Empty Sella Syndrome.
- Eunuchoidism Familial HypogonadotropicDr. Fenner isExperienced. Learn about Eunuchoidism Familial Hypogonadotropic.
- Familial Glucocorticoid DeficiencyDr. Fenner isExperienced. Learn about Familial Glucocorticoid Deficiency.
- Familial Hyperthyroidism due to Mutations in TSH Receptor
- Familial Hypocalciuric Hypercalcemia Type 1
- Generalized Resistance to Thyroid Hormone
- Glucocorticoid ResistanceDr. Fenner isExperienced. Learn about Glucocorticoid Resistance.
- Growth Hormone Deficiency (GHD)Dr. Fenner isExperienced. Learn about Growth Hormone Deficiency (GHD).
- Hashimoto ThyroiditisDr. Fenner isExperienced. Learn about Hashimoto Thyroiditis.
- Hereditary Paraganglioma-Pheochromocytoma Syndrome
- HypercalcemiaDr. Fenner isExperienced. Learn about Hypercalcemia.
- HypoaldosteronismDr. Fenner isExperienced. Learn about Hypoaldosteronism.
- HypogonadismDr. Fenner isExperienced. Learn about Hypogonadism.
- Hypogonadism Primary Partial AlopeciaDr. Fenner isExperienced. Learn about Hypogonadism Primary Partial Alopecia.
- Hypogonadotropic HypogonadismDr. Fenner isExperienced. Learn about Hypogonadotropic Hypogonadism.
- HypoparathyroidismDr. Fenner isExperienced. Learn about Hypoparathyroidism.
- HypopituitarismDr. Fenner isExperienced. Learn about Hypopituitarism.
- Hypothalamic TumorDr. Fenner isExperienced. Learn about Hypothalamic Tumor.
- Idiopathic HypercalciuriaDr. Fenner isExperienced. Learn about Idiopathic Hypercalciuria.
- Infant HyperglycemiaDr. Fenner isExperienced. Learn about Infant Hyperglycemia.
- InfertilityDr. Fenner isExperienced. Learn about Infertility.
- Isolated ACTH DeficiencyDr. Fenner isExperienced. Learn about Isolated ACTH Deficiency.
- Isolated Hypogonadotropic HypogonadismDr. Fenner isExperienced. Learn about Isolated Hypogonadotropic Hypogonadism.
- Juvenile Primary OsteoporosisDr. Fenner isExperienced. Learn about Juvenile Primary Osteoporosis.
- Kallmann SyndromeDr. Fenner isExperienced. Learn about Kallmann Syndrome.
- Klinefelter SyndromeDr. Fenner isExperienced. Learn about Klinefelter Syndrome.
- Low Blood SugarDr. Fenner isExperienced. Learn about Low Blood Sugar.
- Male Pseudohermaphroditism with Gynecomastia
- Maturity Onset Diabetes of the YoungDr. Fenner isExperienced. Learn about Maturity Onset Diabetes of the Young.
- MelorheostosisDr. Fenner isExperienced. Learn about Melorheostosis.
- Melorheostosis with OsteopoikilosisDr. Fenner isExperienced. Learn about Melorheostosis with Osteopoikilosis.
- Milk-Alkali SyndromeDr. Fenner isExperienced. Learn about Milk-Alkali Syndrome.
- OsteopeniaDr. Fenner isExperienced. Learn about Osteopenia.
- Paget's Disease of BoneDr. Fenner isExperienced. Learn about Paget's Disease of Bone.
- PanhypopituitarismDr. Fenner isExperienced. Learn about Panhypopituitarism.
- Pediatric Growth Hormone DeficiencyDr. Fenner isExperienced. Learn about Pediatric Growth Hormone Deficiency.
- PheochromocytomaDr. Fenner isExperienced. Learn about Pheochromocytoma.
- Pituitary ApoplexyDr. Fenner isExperienced. Learn about Pituitary Apoplexy.
- Rathke Cleft CystDr. Fenner isExperienced. Learn about Rathke Cleft Cyst.
- Secondary Adrenal InsufficiencyDr. Fenner isExperienced. Learn about Secondary Adrenal Insufficiency.
- Secondary Immunodeficiency (SID)Dr. Fenner isExperienced. Learn about Secondary Immunodeficiency (SID).
- Sheehan SyndromeDr. Fenner isExperienced. Learn about Sheehan Syndrome.
- Short Stature (Growth Disorders)Dr. Fenner isExperienced. Learn about Short Stature (Growth Disorders).
- Testicular FailureDr. Fenner isExperienced. Learn about Testicular Failure.
- Thyroid Hormone Plasma Membrane Transport Defect
- Vitamin D DeficiencyDr. Fenner isExperienced. Learn about Vitamin D Deficiency.