Dr. Michael J. Zerega
- Gender: Male
- Experience: 24 years
- Graduated from: Washington University School Of Medicine
- Graduation year: 1997
- Sole propriator: No
- NPI: 1073505178
Dr. Michael J. Zerega MD
Gastroenterologist
He is located at 200 Brevco Plaza Suite 208 in Lake St Louis, MO 63367. Can help patients with the following: Botulism, Gallbladder Pain, Gastric Bypass Surgery, Hepatitis A (HAV), Obesity, Ulcerative Colitis. His National Provider Identifier (NPI) number is 1073505178. Appointment can be made via the phone number (636) 561-9020. He is affiliated with 2 practices and 4 hospitals.
Conditions treated
Dr. Michael J. Zerega, being an gastroenterologist, 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. Michael J. Zerega.
- Abdominal Pain
- Acute Pain
- Anemia
- Arthritis
- Ascites
- Asthma
- Atherosclerosis
- Autoimmune Hepatitis
- Bad Breath
- Barrett's Esophagus
- Bladder Control
- Bleeding Varices
- Blood in Stool
- Botulism
- Cancer
- Carcinoid Tumor
- Celiac Disease
- Chest Pain
- Childhood Obesity
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Cirrhosis
- Clostridium Difficile Colitis
- Colitis
- Colonoscopy
- Common Cold
- Constipation
- Crohn's Disease
- Cystitis
- Diarrhea
- Diverticulosis
- Edema
- Eosinophilic Esophagitis
- Esophagitis
- Fatty Liver Disease
- Feeding and Swallowing
- Fever
- Food Allergies
- Gallbladder Pain
- Gastric Bypass Surgery
- Gastritis
- Gastroesophageal Reflux Disease (GERD)
- Gastroparesis
- General Care
- Headache
- Heart Disease
- Heartburn
- Helicobacter Pylori Infection
- Hemorrhoids
- Hepatitis A (HAV)
- Hepatitis B (HBV)
- Hepatitis C (HCV)
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Indigestion
- Inflammatory Bowel Disease (IBD)
- Influenza
- Inguinal Hernia
- Internal Bleeding
- Intussusception
- Irritable Bowel Syndrome (IBS)
- Lactose Intolerance
- Leaky Gut Syndrome
- Liver Disease
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Pancreas Divisum
- Pancreatic Cancer
- Pancreatic Cysts
- Pancreatitis
- Peptic Ulcer
- Portal Hypertension
- Prescription Refill
- Primary Biliary Cirrhosis (PBC)
- Primary Sclerosing Cholangitis (PSC)
- Stomach Cancer
- Swallowing Disorders
- Ulcerative Colitis
- Urethritis
- Urinary Tract Infection (UTI)
Procedures Performed by Dr. Michael J. Zerega
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Michael J. Zerega as in-network for the following 2026 plans.
Health plans
Ambetter Health
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 16 plans from Ambetter Health
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Complete Gold | EPO · Gold | Preferred | Accepting new patients |
| Complete Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Complete Silver | EPO · Silver | Preferred | Accepting new patients |
| Complete Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
| Elite Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Gold | EPO · Gold | Preferred | Accepting new patients |
| Everyday Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Standard Expanded Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Gold | EPO · Gold | Preferred | Accepting new patients |
| Standard Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Standard Silver | EPO · Silver | Preferred | Accepting new patients |
| Standard Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
Anthem Blue Cross and Blue Shield
Network data as of Mar 26, 2026, as reported by the insurer.
Show all 10 plans from Anthem Blue Cross and Blue Shield
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Anthem Bronze Pathway 10150 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Bronze | Participating | Accepting new patients at some locations |
| Anthem Bronze Pathway 6900 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Expanded Bronze | Participating | Accepting new patients at some locations |
| Anthem Bronze Pathway 7500 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Expanded Bronze | Participating | Accepting new patients at some locations |
| Anthem Catastrophic Pathway (+ Incentives) | EPO · Catastrophic | Participating | Accepting new patients at some locations |
| Anthem Gold Pathway 2000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Gold | Participating | Accepting new patients at some locations |
| Anthem Heart Healthy Bronze Pathway 4900 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Expanded Bronze | Participating | Accepting new patients at some locations |
| Anthem Heart Healthy Silver Pathway 3100 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
| Anthem Silver Pathway 5350 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
| Anthem Silver Pathway 6000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
| Anthem Silver Pathway 7200 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
Medica
Network data as of Jul 13, 2026, as reported by the insurer.
Show all 9 plans from Medica
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Balance by Medica Bronze $0 Copay PCP Visits | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Balance by Medica Bronze Premier | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Balance by Medica Expanded Bronze Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Balance by Medica Gold $0 Copay PCP Visits | EPO · Gold | Preferred | Accepting new patients |
| Balance by Medica Gold Share | EPO · Gold | Preferred | Accepting new patients |
| Balance by Medica Gold Standard | EPO · Gold | Preferred | Accepting new patients |
| Balance by Medica Silver $0 Copay PCP Visits | EPO · Silver | Preferred | Accepting new patients |
| Balance by Medica Silver Share | EPO · Silver | Preferred | Accepting new patients |
| Balance by Medica Silver Standard | EPO · Silver | Preferred | Accepting new patients |
UnitedHealthcare
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 13 plans from UnitedHealthcare
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Essential (No Referrals) | EPO · Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard (No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard+ (Dental + Vision, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $8 Tier 2 Rx, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Standard (No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard (No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard+ (Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | 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. Michael J. Zerega 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. Michael J. Zerega is enrolled to bill Medicare as a Practitioner - Gastroenterology .
Bills through: Mercy Hospitals East Communities
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
| Shire North American Group | $87 |
| Pfizer | $36 |
| Valeant Pharmaceuticals North America | $20 |
Other
| Food and Beverage | $173 |
Studies
WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated in 1997Additional Specialities
- Internist
Affiliated hospitals
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Questions & Answers
What conditions does Dr. Michael J. Zerega treat?
Dr. Michael J. Zerega provides treatment for Botulism, Gallbladder Pain, Gastric Bypass Surgery, Hepatitis A (HAV), Obesity, Ulcerative Colitis. For the full list see this list.
Has Dr. Michael J. Zerega affiliation with hospitals?
Dr. Michael J. Zerega is affiliated with ST ANTHONY'S MEDICAL CENTER. For the full list of hospitals see this list.
Does Dr. Michael J. Zerega have affiliation with practices?
Dr. Michael J. Zerega is affiliated with Mercy Clinic Gastroenterology. For the full list of practices see this list.
Does Dr. Michael J. Zerega accept patients with Ambetter Health?
Yes, Dr. Michael J. Zerega is listed in-network for Ambetter Health through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Where can you meet with Dr. Michael J. Zerega?
Dr. Michael J. Zerega's office is located at 200 Brevco Plaza Suite 208 in Lake St Louis, MO 63367.