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Dr. Klaus Mergener, MD
Gastroenterology* Age 63
Dr. Klaus Mergener, MD
Map Pin Small Sioux Falls, SD
Dr. Klaus Mergener, MD is a Gastroenterologist in Sioux Falls, SD.
Dr. Klaus Mergener, MD

Dr. Klaus Mergener, MD

Gastroenterology* Age 63
Sioux Falls, SD
Accepting new patients
Dr. Klaus Mergener, MD is a Gastroenterologist in Sioux Falls, SD.
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About Dr. Klaus Mergener, MD

Dr. Klaus Mergener, MD is a Gastroenterologist in Sioux Falls, SD. Dr. Mergener currently practices at Avera McKennan Hospital and University Health Center and is affiliated with Avera McKennan Hospital and University Health Center. Dr. Mergener has experience treating conditions like Malnutrition and Hypokalemia among other conditions at varying frequencies. Dr. Mergener's office accepts new patients. Dr. Mergener also speaks French and German. Dr. Mergener is board certified in Gastroenterology and accepts multiple insurance plans.

Experience Check

Enter a condition or procedure
Malnutrition
Hypokalemia
Dehydration
Malnutrition
Hypokalemia
Dehydration
Malnutrition
Hypokalemia
Dehydration
Constipation
Bile Duct Obstruction
ERCP (Endoscopic Retrograde Cholangiopancreatography)
Rigid Proctosigmoidoscopy
Manometry
Flexible Sigmoidoscopy
Ileus
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Gastrointestinal Bleeding
Laparoscopic Removal of Stones from Biliary Tract
Gastroptosis
Gallstones
Intestinal Diverticulitis
Hemorrhoids
Anemia
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Esophageal Varices
Diaphragmatic and Hiatal Hernia
Cholangitis
Duodenal Ulcer
Gastroesophageal Reflux Disease (GERD)
Metabolic Dysfunction Associated Steatotic Liver Disease (MASLD)
Endoscopy
Gastric Ulcer
Pancreatitis
Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
Colonoscopy
Duodenal Polypectomy
Intestinal Diverticulosis
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Gastritis
Abdominal Pain
Intestinal Ulcer
Intestinal Obstruction
Retroperitoneum Cancer
Colorectal Polyp
Ascites
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Inflammatory Bowel Disease
Bile Duct Procedure
Noninfectious Gastroenteritis and Colitis
Vomiting Disorders
Dysphagia
Vitamin_Deficiency
Cirrhosis
Enteritis
Esophagitis
Reflux Esophagitis
Diarrhea
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Pancreas Surgeries
Chronic Gastritis
Infectious Diarrheal Disease
Upper Digestive Tract Cancer
Gastroparesis
Esophageal Motility Disorders
Nausea
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Gas-Bloat Syndrome
Barrett's Esophagus
Congenital Anomaly Intestine
Alcoholic Hepatic Failure
Acidosis
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Acute Bronchitis
Acute Deep Vein Thrombosis (DVT)
Acute Gastritis
Acute Lower Respiratory Infection
Acute Pharyngitis
Acute Upper Respiratory Infection
Acute Venous Embolism Thrombosis
ADHD and-or ADD
Adult Failure to Thrive
Alcoholic Cirrhosis
Alcoholic Gastritis
Alcoholic Hepatitis
Alkalosis
All Types of Food Poisoning
Allergic Conjunctivitis
Allergic Rhinitis
Anal or Rectal Pain
Animal Allergies
Anxiety
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Arthritis of the Elbow
Arthritis of the Neck
Aspergillosis
Asphyxia and Hypoxemia
Asthma
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Ataxia
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Atherosclerosis
Atopic Dermatitis (Eczema)
Autoimmune Hepatitis
Back Pain
Barretts Esophagus with Dysplasia
Bedsores
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Benign Chronic Pain Syndrome
Bladder Infection
Blood in Urine (Hematuria)
Boerhaave's Syndrome
Bowel Strangulation
Bronchiectasis
Bronchitis
Bruise of Face, Scalp, or Neck
Cachexia
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Calcium Metabolism Disorders
Candidiasis of Skin and Nails
Canker Sore
Carpal Tunnel Syndrome
Celiac Disease
Cellulitis
Chlamydia Infections
Chondromalacia
Chronic Anal Fissure
Chronic Cholecystitis
Chronic Deep Vein Thrombosis (DVT)
Chronic Depression (Dysthymia)
Chronic Fatigue Syndrome
Chronic Neck Pain
Chronic Pain
Chronic Sinusitis
Cold Sore
Colon Cancer
Common Cold
Cough
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Crohn's Disease
Cyclical Vomiting
Cyclical Vomiting Syndrome
Cystic Fibrosis
Deep Vein Thrombosis (DVT)
Diabetes Type 1
Diabetic Polyneuropathy
Diffuse Esophageal Spasm
Dizziness
Down Syndrome
Duodenal Cancer
Duodenitis
Dysentery
Dyslipidemia
E. coli Food Poisoning
Eczema and Contact Dermatitis
Emphysema
Enlarged Prostate (BPH)
Eosinophilic Esophagitis
Esophageal Achalasia and Cardiospasm
Esophageal Diverticulum
Esophageal Ulcer
Essential Tremor
Familial Adenomatous Polyposis
Fever
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Fibromyalgia
Folate Deficiency Anemia
Food Poisoning
Gastrointestinal Malabsorption
Gastrojejunal Ulcer
Genital Herpes
Genital Warts
Gout
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Headache
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Heartburn
Hepatitis A
Hepatitis B
Hepatitis C
Hepatorenal Syndrome
Hereditary Amyloidosis
Hernia
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Herpes Simplex Infection
Human Immunodeficiency Virus (HIV)
Hypercalcemia
Hyperkalemia
Hypoglycemia
Hypotension
Hypotension (Excluding Maternal)
Hypothyroidism
Hypoxemia
Indigestion
Insomnia
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Interstitial Cystitis
Intertrigo
Intestinal Fistula
Intestinal Prolapse
Irritable Bowel Syndrome
Ischemic Colitis
Itchy Skin
Kidney Infection
Lactose Intolerance
Leg and Foot Ulcers
Leukocytopenia
Liver Abscess
Liver Damage from Alcohol
Long COVID Disorder
Low Back Pain
Magnesium Metabolism Disorders
Malaise and Fatigue
Mallory-Weiss Syndrome
Megacolon
Menstrual Disorders
Migraine
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Mild Asthma
Mineral Metabolism Disorders
Mood Disorders (Dysthymia and Cyclothymia)
Muscle Cramping
Muscle Spasm
Muscle Weakness
Nail Infection
Nasopharyngitis
Neck Strain (incl. Whiplash Injury)
Neurogenic Bladder
Nosebleed
Obesity
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Onychomycosis
Osteoarthritis
Osteoarthritis of Foot
Osteoarthritis of Hand
Osteoarthritis of Hand or Wrist
Osteoarthritis of Hip
Osteoarthritis of Hip and Thigh
Osteoarthritis of Knee
Osteoarthritis of Shoulder
Osteoarthritis of Spine
Osteopenia
Osteoporosis
Otitis Media
Overactive Bladder
Overweight
Painful Urination (Dysuria)
Pancreatic Pseudocyst
Patellofemoral Pain Syndrome (PFPS)
Pelvic Abscess
Peptic Ulcer
Pericardial Disease
Peripheral Nerve Disorders
Pernicious Anemia
Pharyngitis
Phosphorus Metabolism Disorders
Pinkeye (Conjunctivitis)
Pneumonia
Polymyalgia Rheumatica (PMR)
Polyneuropathy
Polyuria
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Proctoptosis
Prostatitis
Purpura
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Pyloric Stenosis
Radiculopathy
Rash
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Raynaud's Disease
Rectal Prolapse
Rectal Ulcer
Restless Leg Syndrome
Rhabdomyolysis
Ringworm
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Rosacea
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Salmonella Food Poisoning
Sarcoidosis
Sciatica
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Sclerosing Mesenteritis
Scrotal Pain
Secondary Hypertension
Secondary Renovascular Hypertension
Sexually Transmitted Diseases (STDs)
Sickle Cell Disease
Sinus Bradycardia
Sinus Tachycardia
Sinusitis
Sleep Apnea
Small Intestine Infarction
Speech, Language and Learning Disorders
Splenic Infarct
Splenomegaly
Sprains and Strains (incl. Muscle Tear)
Tapeworm Infection
Tension Headache
Tremor
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Ulcerative Colitis
Unexplained Weight Loss
Urinary Hesitancy
Urinary Incontinence
Urinary Stones
Vaginitis or Vaginosis
Venous Compression
Venous Embolism and Thrombosis
Venous Insufficiency
Vertigo
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Viral Enteritis
Viral Hepatitis
Viral Infection
Vitamin B Deficiency
Vitamin B12 Anemia
Vitamin D Deficiency
Warts
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Wheezing
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Yeast Infections
Abscess or Fluid Incision and Drainage
Arterial Blood Gas Test (ABG)
Biliary Drainage
Colonoscopy With Polypectomy
Esophagogastric Fundoplasty
Fecal Occult Blood Test for Colorectal Cancer
Hemorrhoidectomy or Excision of Anal Tags
Immunization Administration
Liver Biopsy
Proctosigmoidoscopy
Sigmoidoscopy
Transendoscopic Stent Placement
Upper GI Series

Accepted Insurance Plans

* Please verify this information when scheduling an appointment.
  • Curative PPO
    Curative PPO Plus
    Curative EPO
  • Choice Plus POS II
  • HealthyBlue Advantage
    HealthyBlue 2.0
  • Blue Card PPO
  • First Health (Coventry Health Care) PPO
  • MultiPlan PPO
  • Cigna PPO
    Cigna
    LocalPlus
    Open Access Plus
  • National (BlueCard) PPO

Where Dr. Klaus Mergener, MD Sees Patients

  1. 1 Avera McKennan Hospital and University Health Center
    1325 S Cliff Ave, Sioux Falls, SD 57105
    Icon Directions Right Arrow Directions Phone Icon (605) 322-8000
  2. 2 Office
    21600 Highway 99 Ste 220, Edmonds, WA 98026
    Icon Directions Right Arrow Directions Phone Icon (425) 774-2650

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Meet Dr. Klaus Mergener, MD

Languages Spoken
French
German
Languages Spoken
Specialties*
Internal Medicine
Gastroenterology
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Common Questions and Answers
Responses are sourced directly from patients.
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FAQs About Dr. Mergener's Practice

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Klaus Mergener, MD. To arrange an appointment, call the number on Dr. Mergener's profile.

Dr. Mergener frequently treats the following conditions: Malnutrition and Hypokalemia. See more on Sharecare.

Dr. Klaus Mergener, MD is affiliated with Avera McKennan Hospital and University Health Center.

Yes, Dr. Klaus Mergener, MD holds board certification in Gastroenterology.
Training & Medical Education
Board Certifications
  • Gastroenterology
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.
Internship
  • Duke University
    1993
Internship
Residency Hospital
  • Duke University
    1995
Residency Hospital
Fellowship Hospital
  • Duke University Medical Center
    1998
Fellowship Hospital

Hospitals Where Dr. Klaus Mergener, MD Practices

  • Avera McKennan Hospital and University Health Center

    1325 S Cliff Ave, Sioux Falls, SD

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