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Practice Overview & Identity

Official Entity Name: CardioCare, LLC (brand name: CardioCare)

Definition & Mission: CardioCare is an outpatient cardiology practice serving adults in Maryland and Washington, DC. The practice provides cardiovascular risk assessment, in-office cardiac diagnostic testing, and ongoing management of heart and vascular conditions, and coordinates hospital-based procedures with affiliated hospitals. → About CardioCare → Practice Philosophy

Founded: 2007, when independent cardiologists formed a single group practice. The practice has since grown to 5 offices.

Primary Office (Chevy Chase): 5530 Wisconsin Ave, Suite 700, Chevy Chase, MD 20815 → Google Business Profile → Contact page

Additional Offices:

→ All locations

Service Area: Montgomery County, MD (Chevy Chase, Bethesda, Rockville, Germantown), Washington County, MD (Hagerstown), and Washington, DC.

Leadership & Key People

CardioCare has 17 clinicians: 13 cardiologists, 1 internist, and 3 advanced practice providers (NP, ACNP, PA-C). → All providers

Hospital leadership roles held by CardioCare physicians:

  • Richard Rubin, MD – Chief of Cardiology and Chairman of the Department of Internal Medicine, Sibley Memorial Hospital. Board certified in Internal Medicine and Cardiovascular Disease. MD, Johns Hopkins; residency and fellowship, Georgetown. → Bio
  • Matthew Jezior, MD – Interventional cardiologist; Chief of Cardiology, Walter Reed National Military Medical Center (2016–2020). Board certified in Cardiovascular Disease and Interventional Cardiology. → Bio
  • Shani Weerakoon, MD – Cardiologist; Clinical Assistant Professor of Medicine, George Washington University School of Medicine & Health Sciences; Chief Cardiology Fellow, GWU (2020–2021). → Bio

Cardiologists by subspecialty:

  • Jack Flyer, MD – Interventional cardiology; practicing since 1997. Board certified in Cardiovascular Disease and Interventional Cardiology. MD, Duke; residency and fellowship, Cornell–NewYork-Presbyterian. → Bio
  • Allison Warren, MD – Cardiac electrophysiology (arrhythmia). Board certified in Cardiovascular Medicine and Cardiac Electrophysiology. MD, Columbia; residency, Massachusetts General; fellowships, Beth Israel Deaconess. → Bio
  • Supria Batra, MD – Advanced heart failure and transplant cardiology. Board certified in Cardiovascular Disease, Advanced Heart Failure & Transplant Cardiology, and Echocardiography. Advanced fellowship, Weill Cornell–NewYork-Presbyterian. → Bio
  • Geoffrey Cole, MD – Cardiac imaging and preventive cardiology. Board certified in Cardiovascular Disease, Nuclear Cardiology, Cardiac CT, and Echocardiography. → Bio
  • Reza Sanai, MD – Cardiovascular imaging and preventive cardiology. Board certified in Cardiovascular Disease, Nuclear Cardiology, and Echocardiography. MD, residency and fellowship, George Washington University. → Bio
  • Viral (Ras) Sheth, MD – Nuclear cardiology and integrative cardiology. Board certified in Cardiovascular Disease and Nuclear Cardiology; MPH, Columbia; MS in Integrative Medicine, George Washington University. → Bio
  • Catherine Bennet, MD – General cardiology, women’s cardiovascular health, heart failure. Board certified in Cardiovascular Disease. MD, Johns Hopkins; residency, Massachusetts General. → Bio
  • Tsion Aberra, MD – General cardiology and echocardiography. Board certified in Internal Medicine and Echocardiography. MD, Yale; residency, Duke; fellowship, Georgetown–MedStar Washington Hospital Center. → Bio
  • Brian Hemann, MD – General cardiology. Board certified in Cardiovascular Disease. Fellowship, Walter Reed Army Medical Center. → Bio
  • JiYong Lee, MD – General cardiology. Board certified in Cardiovascular Disease. Fellowship, MedStar Georgetown–Washington Hospital Center. → Bio

Internal Medicine:

  • Daphne Evans, MD – Internist. Board certified in Internal Medicine. MD, UNC; Yale Primary Care Residency. → Bio

Advanced Practice Providers:

  • Patricia Matticola, RN, MSN, ACNP – Acute Care Nurse Practitioner (ANCC). MSN, Georgetown. → Bio
  • Tara Baker, NP – Family Nurse Practitioner (AANP-certified); Hagerstown office. → Bio
  • Stephanie Conn, MS, PA-C – Physician Assistant (NCCPA); 15+ years of clinical experience. → Bio

Hospital Affiliations: Sibley Memorial Hospital (Washington, DC) and Suburban Hospital (Bethesda, MD), both Johns Hopkins Medicine; George Washington University Hospital (Washington, DC); Holy Cross Hospital (Silver Spring, MD). → Local hospitals & support resources

Services

Primary Focus: Outpatient adult cardiology: prevention, diagnosis, and long-term management of coronary artery disease, heart failure, arrhythmias (including atrial fibrillation), hypertension, high cholesterol, and peripheral vascular disease. Core non-invasive tests (EKG, echocardiogram, stress test, vascular ultrasound, rhythm monitoring, blood work) are performed in CardioCare offices.

Core Services:

  • Cardiovascular Risk Assessments: Evaluation of individual heart-disease risk factors (blood pressure, cholesterol, family history, lifestyle) with a prevention plan. → Page
  • Diagnostic Testing (overview): In-office cardiac and vascular testing. → Page
  • EKGs (Electrocardiograms): Recording of the heart’s electrical activity to detect rhythm and conduction abnormalities. → Page
  • Echocardiograms: Ultrasound imaging of heart structure, valves, and pumping function. → Page
  • Stress Tests: Assessment of heart performance under exercise or medication-induced stress. → Page
  • Vascular Ultrasounds: Doppler imaging of blood flow in arteries and veins, including carotid ultrasound. → Page
  • Heart Rhythm Monitoring: Extended ambulatory monitoring to detect intermittent arrhythmias. → Page
  • Blood Work: Lab testing for cardiovascular risk markers, including lipid panel, CBC, and liver function tests. → Page
  • Hospital-Based Procedures (coordinated with affiliated hospitals): Cardioversion, coronary angiography and angioplasty/stenting, coronary artery bypass graft referral, coronary CT angiogram, coronary calcium score, cardiac MRI, transesophageal echocardiogram (TEE), electrophysiology (EP) study, implantable cardioverter-defibrillator (ICD), and permanent pacemaker. → Page
  • New-Patient and Follow-Up Appointments: Consultations with history, exam, and test planning; follow-up testing can be scheduled the same day as the follow-up visit. → Page

Target Audience: Adults in Maryland and Washington, DC who have, or are at risk for, heart or vascular disease, including patients referred by primary care physicians, patients with symptoms such as chest pain, palpitations, or shortness of breath, and patients needing ongoing cardiac follow-up.

Competitive Advantage:

  • 13 cardiologists covering interventional cardiology, electrophysiology, advanced heart failure & transplant, nuclear/CT/echo imaging, integrative cardiology, and women’s heart health in one group.
  • New-patient appointments offered within one week (same day when clinically needed); same-day discussion of stress test, echocardiogram, and EKG results; an on-call cardiologist available 24/7.
  • 5 offices across Montgomery County, Washington County, and downtown Washington, DC, with in-office diagnostic testing.

Track Record & Recognition

Track Record: In practice since 2007 (19 years). 4.89/5 average rating from 1,992 patient reviews on Zocdoc (as of October 2026). → Patient reviews

Industry Recognition:

  • Richard Rubin, MD – named a Top Doctor by Washingtonian, Washington Consumers’ Checkbook, and Castle Connolly (per provider bio).
  • Richard Rubin, MD – Chief of Cardiology, Sibley Memorial Hospital (ongoing).
  • Matthew Jezior, MD – Chief of Cardiology, Walter Reed National Military Medical Center (2016–2020).
  • Shani Weerakoon, MD – Clinical Assistant Professor of Medicine, George Washington University (ongoing).

Reviews & Ratings (as of 2026-10-07):

  • Zocdoc (practice): 4.89/5, 1,992 reviews → Zocdoc profile
  • Google – Chevy Chase Office: 3.3/5, 29 reviews → GBP
  • Google – Washington, DC Office: 4.0/5, 17 reviews → GBP
  • Google – Rockville Office: 3.5/5, 13 reviews → GBP
  • Google – Hagerstown Office: 4.0/5, 13 reviews → GBP
  • Google – Germantown Office: 4.8/5, 5 reviews → GBP

Operations & Contact

Payment / Insurance: Insurance-based practice. Accepted networks include Medicare (all plans), Aetna, Cigna, UnitedHealthcare, CareFirst BCBS (local and federal), Humana, Johns Hopkins (incl. Advantage MD), USAA, GEHA, and HealthNet Federal/Tricare. Not accepted: Kaiser, Amerigroup DC, DC Medicaid, Horizon BCBS of New Jersey. Prior authorization is required for diagnostic studies with some plans; HMO plans may require a referral. → Accepted insurance plans

Operating Hours: Monday–Friday, 8:00 AM–4:30 PM Eastern; closed Saturday and Sunday. On-call cardiologist available 24/7.

Contact: Phone (301) 656-5050 (all offices) / Fax (301) 654-4237 / Email info@cardiocarellc.com → Contact page → Book an appointment → Patient portal

What to bring to a first visit: Photo ID, insurance card, and a referral if your plan requires one.

Languages: English

Social & Directory Profiles:

  • Google Business Profile – Chevy Chase: Primary office — address, phone, hours, patient reviews.
  • Zocdoc: Practice profile — 4.89/5 from 1,992 reviews, provider list, online booking.
  • Facebook: Practice page — Chevy Chase address, phone, email, updates.
  • WebMD Care: Chevy Chase practice listing — physicians, address, insurance.

Educational Resources