Dr. Samuel L. Johnston
- Gender: Male
- Experience: 19 years
- Graduated from: Loyola University Of Chicago, Stritch School Of Medicine
- Graduation year: 2002
- Sole propriator: No
- NPI: 1184832271
Dr. Samuel L. Johnston M.D.
Cardiac Electrophysiologist
He is located at 200 Hawkins Drive E315Gh in Iowa City, IA 52242. Can help patients with the following: Carotid Artery Disease, Congenital Heart Disease (CHD), Hyponatremia, Migraine, Pericardial Tamponade, Wolff-Parkinson-White Syndrome (WPW). His National Provider Identifier (NPI) number is 1184832271. Appointment can be made via the phone number (319) 356-3689. He is affiliated with 1 practices and 2 hospitals.
Conditions treated
Dr. Samuel Lewis Johnston, being an cardiac electrophysiologist, 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. Samuel L. Johnston.
- Abdominal Pain
- Acute Pain
- Anemia
- Angina
- Arthritis
- Asthma
- Atherosclerosis
- Atrial Fibrillation
- Atrial Septal Defect (ASD)
- Bladder Control
- Bradycardia
- Carotid Artery Disease
- Cerebral Aneurysm
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Chronic Venous Insufficiency
- Common Cold
- Congenital Heart Disease (CHD)
- Constipation
- Cystitis
- Diarrhea
- Edema
- Fever
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Headache
- Heart Disease
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Influenza
- Inguinal Hernia
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Pacemaker
- Peptic Ulcer
- Pericardial Tamponade
- Pericarditis
- Prescription Refill
- Renal Vascular Disease
- Rheumatic Heart Disease
- Urethritis
- Urinary Tract Infection (UTI)
- Wolff-Parkinson-White Syndrome (WPW)
Procedures Performed by Dr. Samuel L. Johnston
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Samuel L. Johnston as in-network for the following 2026 plans.
Health plans
Medica
Network data as of Mar 9, 2026, as reported by the insurer.
Show all 18 plans from Medica
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Medica Insure Bronze $0 Copay PCP Visits | EPO · Expanded Bronze | Preferredtier | Accepting new patients |
| Medica Insure Bronze $0 Copay PCP Visits | EPO · Expanded Bronze | Standardtier | Accepting new patients |
| Medica Insure Bronze Share | EPO · Expanded Bronze | Preferredtier | Accepting new patients |
| Medica Insure Bronze Share | EPO · Expanded Bronze | Standardtier | Accepting new patients |
| Medica Insure Expanded Bronze Standard | EPO · Expanded Bronze | Preferredtier | Accepting new patients |
| Medica Insure Expanded Bronze Standard | EPO · Expanded Bronze | Standardtier | Accepting new patients |
| Medica Insure Gold $0 Copay PCP Visits | EPO · Gold | Preferredtier | Accepting new patients |
| Medica Insure Gold $0 Copay PCP Visits | EPO · Gold | Standardtier | Accepting new patients |
| Medica Insure Gold Share | EPO · Gold | Preferredtier | Accepting new patients |
| Medica Insure Gold Share | EPO · Gold | Standardtier | Accepting new patients |
| Medica Insure Gold Standard | EPO · Gold | Preferredtier | Accepting new patients |
| Medica Insure Gold Standard | EPO · Gold | Standardtier | Accepting new patients |
| Medica Insure Silver $0 Copay PCP Visits | EPO · Silver | Preferredtier | Accepting new patients |
| Medica Insure Silver $0 Copay PCP Visits | EPO · Silver | Standardtier | Accepting new patients |
| Medica Insure Silver Share | EPO · Silver | Preferredtier | Accepting new patients |
| Medica Insure Silver Share | EPO · Silver | Standardtier | Accepting new patients |
| Medica Insure Silver Standard | EPO · Silver | Preferredtier | Accepting new patients |
| Medica Insure Silver Standard | EPO · Silver | Standardtier | Accepting new patients |
Oscar Insurance Company
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 10 plans from Oscar Insurance Company
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Bronze Classic 4700 | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Classic Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Elite + PCP Saver Plus | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Gold Classic Standard | EPO · Gold | Preferred | Accepting new patients |
| Gold Elite | EPO · Gold | Preferred | Accepting new patients |
| Secure | EPO · Catastrophic | Preferred | Accepting new patients |
| Silver Classic | EPO · Silver | Preferred | Accepting new patients |
| Silver Classic Standard | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple Diabetes | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple PCP Saver | EPO · Silver | Preferred | Accepting new patients |
Wellmark Health Plan of Iowa, Inc.
Network data as of Sep 8, 2026, as reported by the insurer.
Show all 10 plans from Wellmark Health Plan of Iowa, Inc.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Wellmark Bronze HDHP HMO HSA Qualified | HMO · Expanded Bronze | Wellmark Blue HMO Network | Accepting new patients at some locations |
| Wellmark Bronze Standard | UnityPoint Health | HMO · Expanded Bronze | Wellmark Blue HMO Unitypoint Health Network | Accepting new patients at some locations |
| Wellmark Bronze Traditional HMO | HMO · Expanded Bronze | Wellmark Blue HMO Network | Accepting new patients at some locations |
| Wellmark Gold Primary Care | UnityPoint Health | HMO · Gold | Wellmark Blue HMO Unitypoint Health Network | Accepting new patients at some locations |
| Wellmark Gold Traditional HMO | HMO · Gold | Wellmark Blue HMO Network | Accepting new patients at some locations |
| Wellmark Silver Primary Care | UnityPoint Health | HMO · Silver | Wellmark Blue HMO Unitypoint Health Network | Accepting new patients at some locations |
| Wellmark Silver Traditional HMO | HMO · Silver | Wellmark Blue HMO Network | Accepting new patients at some locations |
| Wellmark Standard Bronze HMO | HMO · Expanded Bronze | Wellmark Blue HMO Network | Accepting new patients at some locations |
| Wellmark Standard Gold HMO | HMO · Gold | Wellmark Blue HMO Network | Accepting new patients at some locations |
| Wellmark Standard Silver HMO | HMO · Silver | Wellmark Blue HMO Network | Accepting new patients at some locations |
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. Samuel L. Johnston 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. Samuel L. Johnston is enrolled to bill Medicare as a Practitioner - Cardiovascular Disease (cardiology) (also registered under: Practitioner - Cardiac Electrophysiology) .
Bills through: Cgh Medical Center
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
| Biotronik | $4328 |
| Boston Scientific | $1085 |
| Janssen | $163 |
Other
| Food and Beverage | $4604 |
| Travel and Lodging | $1726 |
Studies
LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated in 2002Additional Specialities
- Internist
Looking for more Cardiac Electrophysiologists?
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- Address: 200 Hawkins Drive Iowa City, 52242, IA
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Questions & Answers
What conditions does Dr. Samuel Lewis Johnston treat?
Dr. Samuel Lewis Johnston provides treatment for Carotid Artery Disease, Congenital Heart Disease (CHD), Hyponatremia, Migraine, Pericardial Tamponade, Wolff-Parkinson-White Syndrome (WPW). For the full list see this list.
Does Dr. Samuel Lewis Johnston have affiliation with practices?
Dr. Samuel Lewis Johnston is affiliated with CGH Main Clinic.
Does Dr. Samuel Lewis Johnston accept patients with Medica?
Yes, Dr. Samuel Lewis Johnston is listed in-network for Medica through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Has Dr. Samuel Lewis Johnston affiliation with hospitals?
Dr. Samuel Lewis Johnston is affiliated with UNIVERSITY OF IOWA HOSPITAL & CLINICS. For the full list of hospitals see this list.
Where can you meet with Dr. Samuel Lewis Johnston?
Dr. Samuel Lewis Johnston's office is located at 200 Hawkins Drive E315Gh in Iowa City, IA 52242.