Dr. Randall S. Fenner
- Gender: Male
- Experience: 13 years
- Graduated from: Sanford School Of Medicine Of University Of South Dakota
- Graduation year: 2008
- Sole propriator: No
- NPI: 1073780375
Dr. Randall S. Fenner M.D.
Endocrinologist
He is located at 1305 West 18th Street in Sioux Falls, SD 57105. Can help patients with the following: Carcinoid Tumor, Common Cold, Diabetes Mellitus (DM) Type 2, Hypercalcemia, Hypocalcemia, Insulin Resistance (IR). His National Provider Identifier (NPI) number is 1073780375. Appointment can be made via the phone number (605) 328-8700. He is affiliated with 2 practices and 5 hospitals.
Conditions treated
Dr. Randall Scott Fenner, being an endocrinologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Randall S. Fenner.
- Abdominal Pain
- Achondroplasia
- Acute Pain
- Addison's Disease
- Amyloidosis
- Anemia
- Arthritis
- Asthma
- Atherosclerosis
- Bladder Control
- Bone Loss
- Carcinoid Tumor
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Common Cold
- Constipation
- Cushing's Syndrome
- Cystitis
- Diabetes
- Diabetes Insipidus (DI)
- Diabetes Mellitus (DM) Type 1
- Diabetes Mellitus (DM) Type 2
- Diabetic Neuropathy
- Diarrhea
- Edema
- Fertility
- Fever
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Goiter
- Graves' Disease
- Growth Hormone Imbalance
- Gynecomastia
- Headache
- Heart Disease
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hypercalcemia
- Hyperglycemia
- Hyperlipidemia
- Hyperparathyroidism
- Hyperthyroidism
- Hypocalcemia
- Hypoglycemia
- Hyponatremia
- Hypoparathyroidism
- Hypothyroidism
- Influenza
- Inguinal Hernia
- Insulin Resistance (IR)
- Low Testosterone
- Metabolic Syndrome
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Peptic Ulcer
- Prescription Refill
- Thyroid Cancer
- Thyroid Disease
- Thyroiditis
- Urethritis
- Urinary Tract Infection (UTI)
- Vitamin D Deficiency
- Wilson-Turner Syndrome
Procedures Performed by Dr. Randall S. Fenner
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Randall S. Fenner as in-network for the following 2026 plans.
Health plans
Sanford Health Plan
Network data as of Aug 9, 2018, as reported by the insurer.
Show all 16 plans from Sanford Health Plan
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Sanford Individual Simplicity $1,750 | PPO · Gold | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $3,500 | PPO · Silver | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $4,750 | PPO · Silver | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $6,500 | PPO · Expanded Bronze | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $7,200 HSA Qualified | PPO · Expanded Bronze | Simplicity | Accepting new patients |
| Sanford Individual Simplicity Standardized $2,000 | PPO · Gold | Simplicity | Accepting new patients |
| Sanford Individual Simplicity Standardized $6,000 | PPO · Silver | Simplicity | Accepting new patients |
| Sanford Individual Simplicity Standardized $7,500 | PPO · Expanded Bronze | Simplicity | Accepting new patients |
| Sanford Individual TRUE $1,750 | HMO · Gold | Shptrue | Accepting new patients |
| Sanford Individual TRUE $3,500 | HMO · Silver | Shptrue | Accepting new patients |
| Sanford Individual TRUE $4,750 | HMO · Silver | Shptrue | Accepting new patients |
| Sanford Individual TRUE $6,500 | HMO · Expanded Bronze | Shptrue | Accepting new patients |
| Sanford Individual TRUE $7,200 HSA Qualified | HMO · Expanded Bronze | Shptrue | Accepting new patients |
| Sanford Individual TRUE Standardized $2,000 | HMO · Gold | Shptrue | Accepting new patients |
| Sanford Individual TRUE Standardized $6,000 | HMO · Silver | Shptrue | Accepting new patients |
| Sanford Individual TRUE Standardized $7,500 | HMO · Expanded Bronze | Shptrue | Accepting new patients |
Wellmark of South Dakota, Inc.
Network data as of Sep 8, 2026, as reported by the insurer.
Show all 7 plans from Wellmark of South Dakota, Inc.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Wellmark Bronze HDHP EPO HSA Qualified (2 plan variants) | EPO · Expanded Bronze | Bluerx Essentials | Accepting new patients |
| Wellmark Bronze Traditional EPO (2 plan variants) | EPO · Expanded Bronze | Bluerx Essentials | Accepting new patients |
| Wellmark Gold Traditional EPO (2 plan variants) | EPO · Gold | Bluerx Essentials | Accepting new patients |
| Wellmark Silver Traditional EPO (2 plan variants) | EPO · Silver | Bluerx Essentials | Accepting new patients |
| Wellmark Standard Bronze EPO (2 plan variants) | EPO · Expanded Bronze | Bluerx Essentials | Accepting new patients |
| Wellmark Standard Gold EPO (2 plan variants) | EPO · Gold | Bluerx Essentials | Accepting new patients |
| Wellmark Standard Silver EPO (2 plan variants) | EPO · Silver | Bluerx Essentials | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Randall S. Fenner is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Randall S. Fenner is enrolled to bill Medicare as a Practitioner - Endocrinology .
Bills through: Sanford Clinic
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| AstraZeneca | $241 |
| Amgen | $180 |
| Novo Nordisk | $170 |
Other
| Food and Beverage | $1881 |
Studies
SANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated in 2008Additional Specialities
- Internist
- Resident
Affiliated hospitals
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Questions & Answers
Does Dr. Randall Scott Fenner accept patients with Wellmark of South Dakota, Inc.?
Yes, Dr. Randall Scott Fenner is listed in-network for Wellmark of South Dakota, Inc. through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
What conditions does Dr. Randall Scott Fenner treat?
Dr. Randall Scott Fenner provides treatment for Carcinoid Tumor, Common Cold, Diabetes Mellitus (DM) Type 2, Hypercalcemia, Hypocalcemia, Insulin Resistance (IR). For the full list see this list.
Has Dr. Randall Scott Fenner affiliation with hospitals?
Dr. Randall Scott Fenner is affiliated with SANFORD USD MEDICAL CENTER. For the full list of hospitals see this list.
Where can you meet with Dr. Randall Scott Fenner?
Dr. Randall Scott Fenner's office is located at 1305 West 18th Street in Sioux Falls, SD 57105.
Does Dr. Randall Scott Fenner have affiliation with practices?
Dr. Randall Scott Fenner is affiliated with Sanford Cardiovascular Institute. For the full list of practices see this list.