Veena Charu, M.D.

Dr. Charu has been in private practice since in 1988 in the field of Hematology and Oncology. She is known for being extremely knowledgeable and for keeping up-to-date with the latest developments and treatments.

Prior to entering in to private practice, she served as the Chief of the Division of Hematology and Oncology at Lincoln Hospital in New York, affiliated with New York Medical College. There she was honored as “Best Teacher” to residents and fellows. She has also held various prestigious positions in community hospitals, serving as the Chairman of the Department of Medicine at Anaheim Regional Medical Center and the Chairman of Cancer Committee and Tumor Board at La Palma Intercommunity Hospital.

Dr. Charu attended Nagpur Medical College in India, where she finished first-in-class in the Department of Medicine. Before immigrating to the United States, she was an Associate Professor of Medicine at Grant Medical College in Bombay, India. Dr. Charu completed her Internal Medicine Residency at Bergen Pines County Hospital in Paramus(New Jersey), followed by fellowships in Hematology at New York Medical College and Oncology at Montefiore Medical Center, affiliated with Albert Einstein Medical College. She is a member of the American Society of Oncology (ASCO) and the Medical Oncology Association of Southern California (MOASC). She is triple board-certified in Internal Medicine, Hematology and Oncology.


Dr. Charu is very caring, honest and devoted to her patients. She is one of the principal investigators for clinical trials that are conducted at Pacific Cancer Medical Center and has authored numerous publications.

Ajit S. Maniam, M.D.

Dr. Ajit Maniam, one of the lead principal investigators has practiced medicine at Pacific Cancer Medical Center since 1996. He brings with him a host of professional affiliations, certifications, honors, and awards. They include Scholar of the Year Award and the Resident Teacher Award from Atlantic City Medical Center, along with certifications from the American Board of Internal Medicine, the American Board of Oncology, and the American Board of Hematology. Dr. Maniam graduated from Madras Medical College in Madras, India, after which he completed his medical internship and residencies in Internal Medicine and General Surgery at Government General Hospital and Apollo Hospital (Madras, India) and Atlantic City Medical Center (Atlantic City, New Jersey).

Dr. Maniam served as a Research Associate at the Laboratory of Immunogenetics and Transplantation at Cornell University Medical Center’s Rogosin Institute, and completed fellowships in Hematology and Oncology at Thomas Jefferson University. He is a member of the Continuing Medical Education Committee of Anaheim Regional Medical Center.

Since joining the practice in 1996, Dr. Maniam has endeavored to provide individuals with compassionate, leading-edge care that takes into account their physical, emotional, and spiritual needs. His colleagues know him to be exceedingly caring, extremely knowledgeable, compassionate, dedicated, and honest.

Jayaram Bharadwaj, M.D.

Jayaram Bharadwaj, MD, is a Board-certified Medical Oncologist. Prior to joining Pacific Cancer Medical Center, Inc., Dr. Jay was affiliated with New Mexico Oncology Hematology Cancer Center, New Mexico. Dr. Jay joined our practice October 2015, leaving his former organization and patients a legacy of compassion and knowledgeable care.

Dr. Jay earned a Bachelor of Medicine/Bachelor of Surgery from Bangalore University, India. He completed his first post-graduate training at the University of Dharwar, India as resident in Internal Medicine. He continued his residency and earned Board Certification in Internal Medicine at Bronx Lebanon Hospital Center in Bronx, New York, which lead him to serve as Chief Medical Resident and later earned his Board Certification in Medical Oncology at the University of Utah, Salt Lake City, Utah.

Dr. Jay has authored several articles published in PubMed and stored as part of the US National Library of Medicine, National Institutes of Health. A few examples of these articles include topics on breast cancer, blood clot and melanoma. Dr. Jay enjoys traveling, playing chess, and hiking.

Thiri Khin, M.D.

Thiri Khin, M.D. is Board-certified medical Oncologist & Hematologist. She completed her studies at the Institute of Medicine I in Myanmar, Burma, which is the oldest and most selective medical school in the country and from Baylor college of Medicine Oncology & Hematology as Chief Fellow in Houston, Texas.

Dr. Khin is also a member of The American Society of Clinical Oncology (ASCO), The American Society of Hematology (ASH), The American Medical Association (AMA), and Myanmar Medical Association (MMA) in Yangon, Myanmar. She was awarded Resident of the year on 2013-2014 at the American College of Physicians as well as the first prize on Completed research category on GME scholar day for “ Antibiotic therapy for Infectious Disease: Stay away from Wikipedia” and the first prize on Research in progress for “Helicobacter pylori and the pathogenesis of Gallbladder carcinoma”

Thiri also passed her matriculation exam with the 10th highest score in the whole country of Myanmar. She was also resident co-investigator with Florida hospital cancer institute on “Peripheral Blood K-ras analysis as a molecular biomarker of cancer risk and relapse” as well as “Role of Helicobacter species in pathogenesis of Gallbladder carcinoma” which was selected as one of the top 4 abstracts in GME scholar.

Publications of Dr. Khin includes different subchapters on “Handbook of prostate cancer and other genitourinary malignancies” and a few articles on “Behavioral Surveillance Surveys on STIS in Gyo-Bin-Gauk Township”

Dr. Khin is fluent in Burmese (Myanmar), Mandarin Chinese, and English. Her hobbies include spending time with her pet dog and cat as well as being a dedicated, caring, and compassionate member of Pacific Cancer Medical Center team.

Maria Ampudia

Maria Ampudia completed her Bachelors of Science in Biology at California State University, Fullerton, and her Primary Care Physician Assistant Program at Western University of Health Sciences. She has over thirteen years of experience serving as a physician assistant in oncology/hematology specialty. A seasoned and creditable professional, Maria’s strength lies in her ever-positive attitude.

Maria is a member of the National Commission on Certification of Physician Assistants (NCCPA), Association of Physician Assistants in Oncology (APAO), California Association of Physician Assistants (CAPA). She has co-authored a paper ‘High prevalence of vitamin D deficiency or insufficiency in breast cancer patients’ presented at the Annual San Antonio Breast Cancer Symposium (2007).

Sharon Westerberg

Sharon Westerberg graduated magna cum laude from the Charles R. Drew University of Medicine and Sciences. She has over fourteen years of clinical experience serving at leading medical institutions and biopharmaceutical companies in California.

Sharon has co-authored several research papers for peer-reviewed journals, and abstracts from her papers have been cited in over 30 essays and dissertations. She has won the Special Recognition in Surgery award from the National Commission on Certification of Physician Assistants (NCCPA), the First Place Research Award at the Charles W. Buggs First Annual Scientific Symposium, and been inducted into the Epsilon Tau Sigma Honor Society.

Sharon is appreciated for her meticulous attention to detail, helpful nature and compassionate attitude towards patients and colleagues.

Shelton (Jim) Colinco

Jim joined the Pacific Cancer Medical Center team in 2001. A Certified Physician Assistant and Sub-Investigator, Jim has over 15 years of clinical experience, excelling in many areas including Hematology, Oncology, Pediatrics, Geriatrics, and Blood and Marrow Transplant Services. He has worked extensively with patients receiving chemotherapy.

Jim graduated magna cum laude from Bernard Baruch College of CUNY with a Bachelor of Arts in Biology, and later received a Master of Science in Medical Clinical Sciences from Emory University School of Medicine. He belongs to the American Academy of Physician Assistants (AAPA) and the California Academy of Physician Assistants (CAPA). Jim is a proud father who enjoys traveling, spending time with his family, and caring for his patients. He can also speak Tagalog, a native language of the Philippines.

Karen Dawson

Karen Dawson has been in the healthcare field for almost 20 years. She received her undergraduate degree B.S. Dietetics at UC, Davis, and worked as a Registered Dietician at Cedars Sinai Medical Center and UC Irvine Hospital for several years before becoming a Physician Assistant.

She completed her Physician Assistant studies at Stanford University School of Medicine, Foothill College in 2008. Karen has worked in internal medicine prior to joining Pacific Cancer Medical Center Hematology/Oncology in 2012. She has a broad knowledge of internal medicine, health and nutrition.

When Karen is not working, she enjoys spending time with her husband and two children. She loves the outdoors and spending time on the beach, in the park and going on hikes. In the winter, Karen and her family like to go snowboarding. Her other interests include boxing classes, reading and food.

Karen admits to a lifelong passion for professional and personal development. She is fluent in Tagalog and is a member of the California Associate of Physician Assistants (CAPA). She is a valuable and knowledgeable member of our team, regarded just as much for her friendliness, confidence and compassion.

Wei Mandy Chen

Wei Mandy Chen pursued a Master Degree in nursing specializing Adult Geriatric nurse practitioner at University of North Carolina at Chapel Hill. Before that, she earned her Bachelor of Arts in Business in China. From the time she moved to the United States she felt the calling to pursue medicine. She has been in health field for almost 10 years, Chen worked at hematology/oncology clinic before she joined Pacific Cancer Medical Center team.

She resides in Irvine with her husband and two kids. In her spare time, she is actively involved at   local community. She understands cancer is a “dreadful disease” that impacts on patient and family on multiple aspects. She has been striving to protect and improve the health of families and communities through promotion of healthy lifestyles, research for disease prevention strategies.

Her goal is to provide patients with the best personalized oncology care through up-to-date evidenced-based medicine and personal support.