Dr. Eileen M. Stewart
- Gender: Female
- Experience: 13 years
- Sole propriator: No
- NPI: 1245403146
Dr. Eileen M. Stewart M.D.
Cardiologist
She is located at 4314 Medical Parkway Suite 200 in Austin, TX 78756. Can help patients with the following: Angina, Arrhythmia, Atrial Septal Defect (ASD), Bradycardia, Premature Ventricular Contraction (PVC), Rheumatic Heart Disease. Her National Provider Identifier (NPI) number is 1245403146. Appointment can be made via the phone number (512) 454-1110. She also has a website where you can get more information. The website can be found at https://healthcare.ascension.org/doctors/1245403146/eileen-merkle-stewart-austin-tx. She is affiliated with 1 practices.
Conditions treated
Dr. Eileen Merkle Stewart, being an cardiologist, 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. Eileen M. Stewart.
- Abdominal Aortic Aneurysm (AAA)
- Amyloidosis
- Angina
- Aortic Stenosis
- Arrhythmia
- Atherosclerosis
- Atrial Fibrillation
- Atrial Flutter
- Atrial Septal Defect (ASD)
- Birth Defects
- Blood Clots
- Bradycardia
- Cardiomyopathy
- Carotid Artery Disease
- Cerebral Aneurysm
- Chest Pain
- Chronic Venous Insufficiency
- Congenital Heart Disease (CHD)
- Congestive Heart Failure (CHF)
- Edema
- Endocarditis
- Fainting
- Heart Attack
- Heart Disease
- Heart Murmur
- Heart Valve Disease
- High Blood Pressure
- High Cholesterol
- Hyperlipidemia
- May-Thurner Syndrome
- Mitral Insufficiency
- Mitral Valve Prolapse (MVP)
- Mitral Valve Stenosis
- Myocarditis
- Orthostatic Hypotension
- Pacemaker
- Palpitations
- Paroxysmal Supraventricular Tachycardia (PSVT)
- Pericardial Tamponade
- Pericarditis
- Postural Orthostatic Tachycardia Syndrome (POTS)
- Premature Ventricular Contraction (PVC)
- Pulmonary Edema
- Pulmonary Embolism (PE)
- Pulmonary Hypertension (PH)
- Renal Vascular Disease
- Rheumatic Fever
- Rheumatic Heart Disease
- Stroke
- Ventricular Fibrillation
- Ventricular Septal Defect (VSD)
- Wolff-Parkinson-White Syndrome (WPW)
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Eileen M. Stewart as in-network for the following 2026 plans.
Health plans
Blue Cross and Blue Shield of Texas
Network data as of Jun 7, 2026, as reported by the insurer.
Show all 19 plans from Blue Cross and Blue Shield of Texas
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Blue Advantage Bronze HMO℠ 204 (27 plan variants) | HMO · Expanded Bronze | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Bronze HMO℠ 301 (14 plan variants) | HMO · Bronze | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Bronze HMO℠ Standard (27 plan variants) | HMO · Expanded Bronze | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Gold HMO℠ 206 (27 plan variants) | HMO · Gold | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Gold HMO℠ 603 (14 plan variants) | HMO · Gold | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Gold HMO℠ Standard (27 plan variants) | HMO · Gold | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Bronze℠ 303 (27 plan variants) | POS · Expanded Bronze | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Bronze℠ 305 (27 plan variants) | POS · Bronze | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Bronze℠ Standard (27 plan variants) | POS · Expanded Bronze | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Gold℠ 203 (27 plan variants) | POS · Gold | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Gold℠ 803 (27 plan variants) | POS · Gold | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Gold℠ Standard (27 plan variants) | POS · Gold | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Silver℠ 202 (27 plan variants) | POS · Silver | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Silver℠ 605 (27 plan variants) | POS · Silver | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Plus Silver℠ Standard (27 plan variants) | POS · Silver | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Security HMO℠ 200 (27 plan variants) | HMO · Catastrophic | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Silver HMO℠ 205 (27 plan variants) | HMO · Silver | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Silver HMO℠ 801 (14 plan variants) | HMO · Silver | Blue Advantage HMO | Accepting new patients |
| Blue Advantage Silver HMO℠ Standard (27 plan variants) | HMO · Silver | Blue Advantage HMO | Accepting new patients |
Harbor Health
Network data as of Sep 14, 2026, as reported by the insurer.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Harbor Health G0 $0 Deductible $0 PCP $0 Mental Health Office Visit $0 Express Care | HMO · Gold | Preferred | Accepting new patients |
| Harbor Health G1S $30 PCP $30 Mental Health Office Visit $30 Express Care | HMO · Gold | Preferred | Accepting new patients |
| Harbor Health S1 $0 PCP $0 Mental Health Office Visit $0 Express Care | HMO · Silver | Preferred | Accepting new patients |
| Harbor Health S1S $40 PCP $40 Mental Health Office Visit $40 Express Care | HMO · Silver | Preferred | Accepting new patients |
Moda Health Plan, Inc.
Network data as of Sep 12, 2026, as reported by the insurer.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Moda Select Texas Bronze 8700 ($0 Virtual Urgent Care through CirrusMD) | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Moda Select Texas Bronze HDHP 7500 | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Moda Select Texas Standard Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Moda Select Texas Standard Gold | EPO · Gold | Preferred | Accepting new patients |
| Moda Select Texas Standard Silver | EPO · Silver | Preferred | Accepting new patients |
Oscar Insurance Company
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 12 plans from Oscar Insurance Company
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Bronze Classic 4700 | EPO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Classic Standard | EPO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Elite + PCP Saver Plus | EPO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Simple Breathe Easy with Enhanced COPD Benefits | EPO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Simple Chronic Care CKM | EPO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Simple Diabetes | EPO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Gold Classic | EPO · Gold | Preferred | Accepting new patients at some locations |
| Gold Classic Standard | EPO · Gold | Preferred | Accepting new patients at some locations |
| Gold Elite | EPO · Gold | Preferred | Accepting new patients at some locations |
| Silver Classic | EPO · Silver | Preferred | Accepting new patients at some locations |
| Silver Classic Standard | EPO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple PCP Saver | EPO · Silver | Preferred | Accepting new patients at some locations |
Sendero Health Plans, Local Nonprofit
Network data as of Sep 14, 2026, as reported by the insurer.
Show all 14 plans from Sendero Health Plans, Local Nonprofit
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Sendero Health Austin512 Silver / $40 PCP / $75 Specialist / $15 Generic Drugs / $0 Deductible | HMO · Silver | Non Preferred | Accepting new patients |
| Sendero Health Austin512 Silver / $40 PCP / $75 Specialist / $15 Generic Drugs / $0 Deductible | HMO · Silver | Preferred | Accepting new patients |
| Sendero Health Capital Silver / $40 PCP / $80 Specialist / $20 Generic Drugs | HMO · Silver | Non Preferred | Accepting new patients |
| Sendero Health Capital Silver / $40 PCP / $80 Specialist / $20 Generic Drugs | HMO · Silver | Preferred | Accepting new patients |
| Sendero Health Hill Country Gold / $30 PCP / $60 Specialist / $15 Generic Drugs | HMO · Gold | Non Preferred | Accepting new patients |
| Sendero Health Hill Country Gold / $30 PCP / $60 Specialist / $15 Generic Drugs | HMO · Gold | Preferred | Accepting new patients |
| Sendero Health Original Silver / $20 PCP + 2 $0 PCP Visits / $10 Generic Drugs | HMO · Silver | Non Preferred | Accepting new patients |
| Sendero Health Original Silver / $20 PCP + 2 $0 PCP Visits / $10 Generic Drugs | HMO · Silver | Preferred | Accepting new patients |
| Sendero Health Preferred Bronze / $25 PCP / $75 Specialist / $22 Generic Drugs | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| Sendero Health Preferred Bronze / $25 PCP / $75 Specialist / $22 Generic Drugs | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Sendero Health Quality Care Bronze High Deductible / $50 PCP / $25 Generic Drugs / $100 Specialist | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| Sendero Health Quality Care Bronze High Deductible / $50 PCP / $25 Generic Drugs / $100 Specialist | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Sendero Health Real Gold / $350 Deductible | HMO · Gold | Non Preferred | Accepting new patients |
| Sendero Health Real Gold / $350 Deductible | HMO · Gold | 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. Eileen M. Stewart 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. Eileen M. Stewart is enrolled to bill Medicare as a Practitioner - Pediatric Medicine .
Bills through: Dell Childrens Medical Group
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
| Hitachi | $12 |
Other
| Other | $12 |
Other ways to reach out
- Website: https://healthcare.ascension.org/doctors/1245403146/eileen-merkle-stewart-austin-tx
Looking for more Cardiologists?
Out of the 19 cardiologists in this region, here are 10 randomly selected ones for you to explore.
- Gender: Female
- Address: #200 4314 Medical Parkway Austin, 78756, TX
- Gender: Male
- Address: Suite 300 3801 North Lamar Boulevard Austin, 78756, TX
- Gender: Male
- Address: 1004 West 32nd Street Suite 300 Austin, 78705, TX
- Gender: Female
- Address: 1110 East 32nd Street Austin, 78722, TX
- Gender: Male
- Address: #300 3801 North Lamar Boulevard Austin, 78756, TX
- Gender: Male
- Address: #200 4314 Medical Parkway Austin, 78756, TX
- Gender: Male
- Address: Suite 300 3801 North Lamar Boulevard Austin, 78756, TX
- Gender: Male
- Address: Suite 300 3801 North Lamar Boulevard Austin, 78756, TX
- Gender: Male
- Address: #200 4314 Medical Parkway Austin, 78756, TX
Questions & Answers
Where can you meet with Dr. Eileen Merkle Stewart?
Dr. Eileen Merkle Stewart's office is located at 4314 Medical Parkway Suite 200 in Austin, TX 78756.
Does Dr. Eileen Merkle Stewart have affiliation with practices?
Dr. Eileen Merkle Stewart is affiliated with Magella Medical Associates.
Does Dr. Eileen Merkle Stewart accept insurance?
Dr. Eileen Merkle Stewart is listed in-network for 54 ACA Marketplace (Obamacare/HealthCare.gov) plans from Blue Cross and Blue Shield of Texas, Harbor Health, Moda Health Plan, Inc., Oscar Insurance Company, Sendero Health Plans, Local Nonprofit. See the Marketplace plans section for details.
What conditions does Dr. Eileen Merkle Stewart treat?
Dr. Eileen Merkle Stewart provides treatment for Angina, Arrhythmia, Atrial Septal Defect (ASD), Bradycardia, Premature Ventricular Contraction (PVC), Rheumatic Heart Disease. For the full list see this list.