Mark Nellenbach
- Gender: Male
- Sole propriator: No
- NPI: 1699258244
Mark Nellenbach PA-C
Cardiologist
He is located at 11100 Euclid Avenue in Cleveland, OH 44106. Can help patients with the following: Atrial Septal Defect (ASD), Heart Attack, Heart Valve Disease, Mitral Valve Prolapse (MVP), Premature Ventricular Contraction (PVC), Wolff-Parkinson-White Syndrome (WPW). His National Provider Identifier (NPI) number is 1699258244. Appointment can be made via the phone number (216) 844-4951. He also has a website where you can get more information. The website can be found at https://www.uhhospitals.org/doctors/Nellenbach-Mark-1699258244. He is affiliated with 1 practices.
Conditions treated
Mark Nellenbach, 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 Mark Nellenbach.
- 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 Mark Nellenbach as in-network for the following 2026 plans.
Health plans
CareSource
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 21 plans from CareSource
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Bronze 7500 $25 Generic Drugs | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze 7500 $25 Generic Drugs + Adult Vision & Fitness | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Core Gold 1500 $10 Generic Drugs | HMO · Gold | Preferred | Accepting new patients |
| Core Gold 1500 $10 Generic Drugs + Adult Vision & Fitness | HMO · Gold | Preferred | Accepting new patients |
| Diabetes Gold 3000 $0 Chronic Care Drugs & Services | HMO · Gold | Preferred | Accepting new patients |
| Diabetes Gold 3000 $0 Chronic Care Drugs & Services + Adult Vision & Fitness | HMO · Gold | Preferred | Accepting new patients |
| Diabetes Silver 5000 $0 Chronic Care Drugs & Services | HMO · Silver | Preferred | Accepting new patients |
| Diabetes Silver 5000 $0 Chronic Care Drugs & Services + Adult Vision & Fitness | HMO · Silver | Preferred | Accepting new patients |
| Gold 2000 $15 Generic Drugs | HMO · Gold | Preferred | Accepting new patients |
| Gold 2000 $15 Generic Drugs + Adult Vision & Fitness | HMO · Gold | Preferred | Accepting new patients |
| HDHP Preventive Silver 5500 $0 Chronic Care Drugs | HMO · Silver | Preferred | Accepting new patients |
| Healthy Heart Gold 3000 $0 Chronic Care Drugs & Services | HMO · Gold | Preferred | Accepting new patients |
| Healthy Heart Gold 3000 $0 Chronic Care Drugs & Services + Adult Vision & Fitness | HMO · Gold | Preferred | Accepting new patients |
| Healthy Heart Silver 5000 $0 Chronic Care Drugs & Services | HMO · Silver | Preferred | Accepting new patients |
| Healthy Heart Silver 5000 $0 Chronic Care Drugs & Services + Adult Vision & Fitness | HMO · Silver | Preferred | Accepting new patients |
| Low Premium Bronze 10600 $25 Generic Drugs | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Low Premium Bronze 10600 $25 Generic Drugs + Adult Vision & Fitness | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Low Premium Silver 6200 $3 Generic Drugs | HMO · Silver | Preferred | Accepting new patients |
| Low Premium Silver 6200 $3 Generic Drugs + Adult Vision & Fitness | HMO · Silver | Preferred | Accepting new patients |
| Silver 6000 $20 Generic Drugs | HMO · Silver | Preferred | Accepting new patients |
| Silver 6000 $20 Generic Drugs + Adult Vision & Fitness | HMO · Silver | 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 Mark Nellenbach 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
Mark Nellenbach is enrolled to bill Medicare as a Practitioner - Physician Assistant .
Bills through: The Cleveland Clinic Foundation
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.
Other ways to reach out
- Website: https://www.uhhospitals.org/doctors/Nellenbach-Mark-1699258244
- Facebook: https://www.facebook.com/UniversityHospitals/
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- Address: Ste 1800 HHVI 11100 Euclid Ave Cleveland, 44106, OH
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- Address: Department of Medicine-Cardiovascular Medicine 11100 Euclid Ave Cleveland, 44106, OH
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- Address: 325 9th Avenue Seattle, 98104, WA
- Gender: Male
- Address: Department of Medicine-Cardiovascular Medicine 11100 Euclid Ave Cleveland, 44106, OH
- Gender: Female
- Address: Department of Medicine-Cardiovascular Medicine 11100 Euclid Ave Cleveland, 44106, OH
Questions & Answers
What conditions does Mark Nellenbach treat?
Mark Nellenbach provides treatment for Atrial Septal Defect (ASD), Heart Attack, Heart Valve Disease, Mitral Valve Prolapse (MVP), Premature Ventricular Contraction (PVC), Wolff-Parkinson-White Syndrome (WPW). For the full list see this list.
Where can you meet with Mark Nellenbach?
Mark Nellenbach's office is located at 11100 Euclid Avenue in Cleveland, OH 44106.
Does Mark Nellenbach have affiliation with practices?
Mark Nellenbach is affiliated with UH Cleveland Medical Center.
Does Mark Nellenbach accept insurance?
Mark Nellenbach is listed in-network for 21 ACA Marketplace (Obamacare/HealthCare.gov) plans from CareSource. See the Marketplace plans section for details.