Abbas Chothia, MD

Dr. Chothia joined Stockton Cardiology Medical Group in 1976. He received his undergraduate education from University of Natal and his MD degree from the University of Cape Town.

Certification

2007 – University of California, Irvine School of Medicine – Cardiovascular CT level II CTA
1974 – Certification in Internal Medicine by American Board of Internal Medicine
1977 – Certification in Cardiovascular Medicine by American Board of Internal Medicine
1975 – F.L.E.X. (for state of Louisiana) aggregate score of 87.8
1975 – E.C.F.M.G. aggregate score of 84

Hospital Affiliations

St. Joseph’s Medical Center, Stockton, CA
Dameron Hospital, Stockton, CA
Mark Twain Hospital, San Andreas, CA

Postgraduate Education

1970-1971 Internship: Rotating Internship, Mercy Hospital Toledo, Ohio
1971-1973 Residency: Internal Medicine Residency, Tulane Program Veteran’s Administration Hospital, New Orleans, Louisiana
1973-1975 Fellowship in Cardiology, Tulane Program V.A. Hospital, New Orleans, Louisiana

Appointments

Medical Director of St. Joseph’s Medical Center
1974-1975 Chief, Medical Resident, V.A. Hospital, New Orleans, LA
1971-1972 Secretary, Housestaff Association V.A. Hospital, New Orleans, LA
1972-1974 President, Housestaff Association V.A. Hospital, New Orleans, LA
1971-1975 Clinical Instructor of Medicine, Tulane Medical School


Surrender Raina, MD

Dr. Raina joined Stockton Cardiology in 1977. Dr. Raina received his undergraduate degree from Government Medical College (M.B.B.S.) Kashmir, India. His postgraduate education and training included internship and residency in Internal Medicine, Mount Sinai Medical Center, New York, Elmhurst Hospital. This was followed by his Fellowship in Cardiology at University of Pennsylvania for 2 years.

Dr. Raina has been in cardiology (invasive and non-invasive) practice for over 30 years. He has extensive experience in complex cardiovascular intervention (heart), complex peripheral (leg) interventions, and carotid (neck artery) stent procedures.

Dr. Raina was first to start the angioplasty program at St. Joseph’s Medical Center in 1984.

Certification

1975 – Certification in Internal Medicine by the American Board of Internal Medicine
Board Eligible in Cardiology

Hospital Affiliation

St. Joseph’s Medical Center – Stockton, CA
Dameron Hospital – Stockton, CA


George Charos, MD, FACC

Dr. Charos completed his undergraduate work at the University of Massachusetts in Amherst, Massachusetts, and received his M.D. from the University of Massachusetts in Worcester, Massachusetts. He completed his internship and residency at Mercy Hospital and Medical Center in San Diego, California, where he served as chief resident. He completed fellowships in both cardiovascular medicine and clinical cardiac electrophysiology at the University of Massachusetts Medical Center in Worcester, Massachusetts. Dr. Charos is board certified in electrophysiology and cardiovascular disease, as well as internal medicine. Dr. Charos joined Stockton Cardiology in 1986.

Certification

2007 – University of California, Irvine School of Medicine – Cardiovascular CT Level II Certificate
2002 – Recertification Clinical Electrophysiology
1993 – Certification in Clinical Electrophysiology Medicine by the American Board of Internal Medicine
1985 – Certification in Cardiovascular Medicine by the American Board of Internal Medicine
1982 – Certification in Internal Medicine by the American Board of Internal Medicine

Hospital Affiliations

St. Joseph’s Medical Center, Stockton, CA
Dameron Hospital, Stockton, CA
Mark Twain Hospital, San Andreas, CA

Fellowship

American College of Cardiology

Abstract

Medical Director in Medical Cardiology, and Chief in Cardiology section of St. Joseph’s Medical Center, CHW, Stockton, California


David Lim, MD, FACC

Dr. Lim received his undergraduate degree from University of California, Berkley and his medical degree from Albert Einstein College of Medicine, New York. He completed his cardiology fellowship at the University of California, San Francisco. Dr. Lim is a native Stocktonian and returned to Stockton to join Stockton Cardiology Medical Group in 1993.

Dr. Lim is currently a member of San Joaquin Community Board.

Certification

2007 – CVCTA Education – ACC level II Coronary CTA Certification
2003 – Recertification in Cardiovascular Disease by the American Board of Internal Medicine
1993 – Certification in Cardiovascular Disease by the American Board of Internal Medicine
1989 – Certification in Internal Medicine by the American Board of Internal Medicine

Hospital Affiliations

St. Joseph’s Medical Center – Stockton, CA
Dameron Hospital – Stockton, CA
Mark Twain Hospital, San Andreas, CA

Fellowship

American College of Cardiology

Professional Society Affiliations

Fellow, American College of Cardiology

Personal

Dr. Lim is married and he and his wife, Charson have two children.


Rajiv Punjya, MD, FACC

Dr. Punjya joined Stockton Cardiology Medical Group in 1996. His office location is Tracy and Manteca. Dr. Punjya received his M.D. degree from Baroda Medical College, Maharaja Sayajirao University, Baroda, India. He completed his internship and residency at Wayne State University of Medicine, Detroit, Michigan. His Interventional and Cardiology Fellowship was completed at Harper Hospital, Wayne State University School of Medicine, in Detroit, Michigan.

Board Certification

2007 – American Society of Nuclear Cardiology
2006 – Cardiovascular Diseases, American Board of Internal Medicine
2006 – Cardiovascular CT Mini – Fellowship: CT training and certification
2005 – Certification in Cardiovascular Disease by the American Board of Internal medicine
1998 – Certification of Echocardiography
1992 – Certification in Internal Medicine by the American Board of Internal Medicine
1988 – Educational Commission for Foreign Medical Graduates
1988 – FLEX Examination

Hospital Affiliations

Sutter Tracy Community Hospital
Doctor’s Hospital of Manteca
St. Joseph’s Medical Center, Stockton

Fellowship

American College of Cardiology

Positions

Chief of Staff – Sutter Tracy Hospital
Chief of Medicine – Sutter Tracy


Richard Waters, MD, FACC

Dr. Waters is a native of Stockton. He joined Stockton Cardiology Medical Group in 2005. He is a graduate of Stanford University and Vanderbilt University School of Medicine. He subsequently completed his internship and residency in internal medicine at Johns Hopkins Hospital. Dr. Waters then completed his Fellowship, Interventional Cardiology at Duke University Medical Center.

Certification

2006 – University of California, Irvine School of Medicine – Cardiovascular CT Level II Certification
2005 – Certification in Interventional Cardiology by the American Board of Internal Medicine
2001 – Certification in Internal Medicine by the American Board of Internal Medicine
2004 – Certification in Cardiovascular Disease by the American Board of Cardiovascular Medicine

Hospital Affiliations

St. Joseph’s Medical Center, Stockton, CA
Dameron Hospital, Stockton, CA
Mark Twain Hospital, San Andreas, CA

Fellowship

American College of Cardiology

Personal

Married to Erica, a primary care pediatrician. Two children: Ella and Reed.
Proficient in Spanish, including extensive travel in South America.
Interest in international medicine.
Hobbies include: running, swimming, water polo, skiing, and backpacking.


Sanjeev Vaishampayan, MD, FACC

Dr. Vaishampayan joined Stockton Cardiology Medical Group in 2010. He received his undergraduate degree and medical education, respectively, from Kalamazoo College and Wayne State University School of Medicine. Dr. Vaishampayan has been practicing clinical cardiology for over 15 years. His practice involves echocardiography, trans-esophageal echocardiography, nuclear cardiology, cardiac catheterization, and pacemaker implantation. He relocated to California in July 2010 from his previous practice in Michigan, joining Stockton cardiology Medical Group.

Certification

2010 – Fluoroscopy – California Department of Public Health
2009 – Certified in Nuclear Cardiology
2006 – Recertified in Cardiology
2008 – Re-Certification Board of Echocardiography
2001 – Certification Board of Nuclear Cardiology
1998 – Certified Board of Echocardiography
1997 – Certified – American Board of Cardiology
1992 – Certified – American Board of Internal Medicine

Hospital Affiliation

St. Joseph’s Medical Center – Stockton, CA
Sutter Tracy Hospital – Tracy, CA
Doctors Hospital – Manteca, CA

Fellowship

American College of Cardiology

Personal

Married to Julie, a CDC physician. They have 4 children. Hobbies include tennis, golf, and cooking.


Ajay Ramanakumar, MD, MPH

Amardeep K Singh, MDDr. Ramanakumar has joined Stockton Cardiology Medical Group and is on the medical staff at St. Joseph’s Medical Center.

He is committed to providing compassionate, evidence based cardiovascular care in a patient centered manner. He works closely with his patients and their family and actively involves them in the decision making process.

Certifications

Board Certified in Cardiovascular Disease
Board Certified in Internal Medicine
Diplomate, Special Competence in Adult Echocardiography (ASCeXAM®)
Diplomate, Certification Board of Nuclear Cardiology
Registered Physician in Vascular Interpretation, ARDMS

Hospital Affiliation

St. Joseph’s Medical Center – Stockton, CA
Dameron Hospital – Stockton, CA

Fellowship

Saint Vincent Hospital, University of Massachusetts, Worcester, MA
Interventional Cardiology Fellow
Cardiovascular Medicine Fellow

Residency

Abington Memorial Hospital, Abington, PA
Chief Resident, Dept. of Internal Medicine
Categorical Resident, Dept. of Internal Medicine

Medical Education

American College of Cardiology
Society for Cardiovascular Angiography and Interventions

Special Clinical Interests

Preventive Cardiology, CAD, Heart Failure


Dr. Puneet D Grewal

Dr. Puneet D Grewal

Non-Invasive Cardiologist

Dr. Puneet D Grewal joined Stockton Cardiology group in February 2018. As a Non-Invasive Cardiologist,
Dr. Grewal focuses on the detection and treatment of heart disease, using external tests to evaluate and
diagnose cardiac disorders. She Graduated from Chicago Medical School for Residency in 2012 and
Cardiology fellowship in 2017. She Worked for University of Chicago for one year before joining the
cardiology fellowship.
Dr. Grewal holds an ABIM Internal Medicine 2016 Board Eligible Cardiology certification and is affiliated
with Sutter Tracy Community Hospital in Tracy and Doctor’s Hospital Manteca in Manteca. She’s the
epitome of a woman who has it all: not only is she a successful cardiologist, but she’s also married and
has a child, a son named Jayvir. As if all of this weren’t impressive enough, Dr. Grewal is proficient in
four languages: English, Hindi, Punjabi, and Urdu.
Despite the demands of the job and drive to spend time with her family, Dr. Grewal still finds time to
maintain her favorite hobbies. She loves swimming, playing tennis, and traveling.


Owais Khawaja, M.D., M.P.H.

Owais Khawaja, M.D., M.P.H.

Medical Practice Focus/ Specialty:

General & Interventional Cardiology

Medical School:

Dow Medical College, Karachi, Pakistan, 1995-2001

Graduate Study:

Master in Public Health, Harvard School of Public Health, Boston, M, 2010-2012

Residency:

Internal Medicine, Providence Hospital, MI from 2005-2008

Fellowship:

General Cardiology, Mercy St Vincent Medical Ctr, Toledo, OH, 2014-2017
Interventional Cardiology, St John Hospital, Detroit, MI, 2017-2018
Critical Care, Dartmouth Hitchcock Medical Ctr, 2012-2013

Teaching Faculty:

Assistant Professor Wayne State University, Providence Hospital, Detroit, MI, 2008-2010

Certification:

ABIM Internal Medicine 2008
ABIM Cardiovascular Disease 2017
ASNC Nuclear Cardiology 2017; ABIM Interventional Cardiology Board Eligible
ABIM Critical Care Board Eligible
AHSCP Specialist in Clinical Hypertension

Post Doc:

Preventive Cardiology, Boston VA Healthcare/ Brigham & Women’s Hospital, Boston, MA

Hospital Affiliations:

St Josephs Medical Ctr, Stockton, CA
Dameron Hospital, Stockton, CA

Research:

well published in peer reviewed journals.

Areas of Interest:

CAD, CHF, Arrhythmias, PAD, and interventional treatments for DVT/PE.

Personal:

Married with 2 kids. Wife is a home maker. Proficient in English, Hindi, Punjabi and Urdu.

Hobbies:

Cricket