
Kelly Okray, PA-C, MSPAS
Physician Assistant
6570 W. Avenue L-12
Lancaster, CA 93536
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Kelly Okray, PA-C, MSPAS
Physician Assistant
6570 W. Avenue L-12
Lancaster, CA 93536
Kanagaratnam Sivalingam, MD, FACP, is a skilled internist at First Valley Medical Group in Lancaster, California. He has more than 40 years of experience in treating numerous acute and chronic conditions. Dr. Sivalingam spends time with patients and listens to their concerns, giving them a voice in their treatment.
Dr. Sivalingam earned his medical degree from the University of Ceylon Medical School in Peradeniya, Sri Lanka. He completed his internal medicine training at the Hospital for Joint Diseases in New York City and his residency at Vembadi Polyclinic in Ceylon, Sri Lanka.
He maintains his advanced credentials with continuing education. Dr. Sivalingam is board certified in internal medicine and licensed in the state of California. He’s a fellow of the American College of Physicians and a member of the American Medical Association, American Society of Echocardiography, American Academy of Anti-Aging Medicine, and numerous other professional organizations.
At First Valley Medical Group, Dr. Sivalingam provides premium care for patients with a variety of chronic diseases using a compassionate bedside manner. He uses the most innovative technology and procedures to provide expert treatments.
Dr. Sivalingam evaluates each patient as a whole person and offers conservative treatments whenever possible. He and his team warmly welcome patients to First Valley Medical Group and look forward to serving them.
Dr. Kanagaratnam Sivalingam, MD
Geriatrician
6570 W. Avenue L-12
Lancaster, CA 93536
Dr. Sharma Bishop, MD
Internist
Telehealth-Virtual Visit
Anaheim, CA 92806
Dr. Barry Buffman has been practicing since 1980 in internal medicine with a specialty in urology. He graduated from the Rush Medical College in Chicago, IL and practices with a focus on a multitude of urological issues, such as sexual dysfunction, bladder, and prostate conditions. In addition, Dr. Buffman is involved with medical research for various urological conditions. In his spare time Dr. Buffman has a passion for teleplay/screenplay, musical composition, guitar, and piano.
Dr. Barry Buffman, MD
Urologist
44725 N. 10th Street West
Suite 170
Lancaster, CA 93534
Kelly Okray, PA-C, MSPAS
Physician Assistant
44725 N. 10th Street West
Suite 170
Lancaster, CA 93534
Kanagaratnam Sivalingam, MD, FACP, is a skilled internist at First Valley Medical Group in Lancaster, California. He has more than 40 years of experience in treating numerous acute and chronic conditions. Dr. Sivalingam spends time with patients and listens to their concerns, giving them a voice in their treatment.
Dr. Sivalingam earned his medical degree from the University of Ceylon Medical School in Peradeniya, Sri Lanka. He completed his internal medicine training at the Hospital for Joint Diseases in New York City and his residency at Vembadi Polyclinic in Ceylon, Sri Lanka.
He maintains his advanced credentials with continuing education. Dr. Sivalingam is board certified in internal medicine and licensed in the state of California. He’s a fellow of the American College of Physicians and a member of the American Medical Association, American Society of Echocardiography, American Academy of Anti-Aging Medicine, and numerous other professional organizations.
At First Valley Medical Group, Dr. Sivalingam provides premium care for patients with a variety of chronic diseases using a compassionate bedside manner. He uses the most innovative technology and procedures to provide expert treatments.
Dr. Sivalingam evaluates each patient as a whole person and offers conservative treatments whenever possible. He and his team warmly welcome patients to First Valley Medical Group and look forward to serving them.
Dr. Kanagaratnam Sivalingam, MD
Geriatrician
44725 N 10th Street West
Suite 250
Lancaster, CA 93534
Cydney Denning, PA-C is a board certified physician assistant who received a Bachelor’s degree in Biological Sciences at Missouri University of Science & Technology in Rolla, Missouri and a Master’s degree in Physician Assistant Studies at Saint Louis University in Saint Louis, Missouri. Cydney’s medical background includes working in both the orthopedic and dermatologic fields. Cydney’s clinical focus includes preventative care, lifestyle intervention, acute and chronic disease management, as well as diagnosing and treating various other conditions. She performs a variety of different in-office procedures including intra-articular joint injections, Pap smears and more. Cydney displays a great deal of empathy and compassion for her patient’s while providing quality, evidenced based care to those in her community. She is currently accepting new and established patients.
Cydney Denning, PA-C
Physician Assistant
44725 N 10th Street West
Suite 250
Lancaster, CA 93534
Dr. John Farag is a dedicated medical professional with a passion for holistic and integrative medicine. His objective is to utilize his skills and experience to serve humanity, focusing on the well-being of the body, mind, and spirit.
Dr. Farag's extensive professional experience spans from 2000 to 2021. He served as the Regional Senior Medical Officer for the CareMore Medical Group Health Management Organization, covering Southern California, Arizona, and Tennessee. During this time, he gained expertise in various medical areas, including inpatient and outpatient medicine, skilled nursing home medicine, geriatrics, and end-of-life care transitions to hospice.
Before that, from 2004 to 2007, he practiced at Clinica Medica San Miguel, where he specialized in outpatient medicine, internal medicine, and family practice, with a focus on the senior population.
His journey in medicine began as a Medical Officer on Duty at the Veterans Administration in West Orange, New Jersey, from 2003 to 2004.
Dr. Farag completed his Internal Medical Residency at New York Hospital, Queens, New York, between 2000 and 2003.
Throughout his career, Dr. Farag has earned various certifications, including a medical license from the California medical board, DEA recertification (awaiting approval), Internal Medicine Board Certification, and completing the UCSF Physician Leadership Program. He has also successfully passed USMLE Steps 1, 2, and 3, as well as obtained the ECFMG Certification and Emergency Medical Technician certification.
His education includes graduating from the Ross University School of Medicine in the year 2000. He also studied at Loyola Marymount University, West Coast University, Glendale Community College, and La Canada Flintridge High School.
Beyond his professional life, Dr. John Farag possesses a diverse range of personal interests. Born on January 10, 1973, in Long Beach, California, he is fluent in English, Spanish, and Arabic. He enjoys engaging in fitness activities such as soccer, basketball, hiking, swimming, and cycling to maintain a healthy lifestyle.
Moreover, Dr. Farag is actively involved in volunteering at Saint Paul Coptic Orthodox Church in Irvine, where he dedicates his time to helping the youth. His commitment to serving others extends to missionary work, as he engaged in a mission from 2021 to 2023, focusing on supporting the youth of North Africa through the integration of the Coptic Orthodox Church. This reflects his dedication to both medicine and humanitarian causes, demonstrating a well-rounded individual committed to making a positive impact on the world.
Dr. John Farag, MD
Internist
615 E Chapman Avenue
Suite #100
Orange, CA 92866
Dr. John Farag is a dedicated medical professional with a passion for holistic and integrative medicine. His objective is to utilize his skills and experience to serve humanity, focusing on the well-being of the body, mind, and spirit.
Dr. Farag's extensive professional experience spans from 2000 to 2021. He served as the Regional Senior Medical Officer for the CareMore Medical Group Health Management Organization, covering Southern California, Arizona, and Tennessee. During this time, he gained expertise in various medical areas, including inpatient and outpatient medicine, skilled nursing home medicine, geriatrics, and end-of-life care transitions to hospice.
Before that, from 2004 to 2007, he practiced at Clinica Medica San Miguel, where he specialized in outpatient medicine, internal medicine, and family practice, with a focus on the senior population.
His journey in medicine began as a Medical Officer on Duty at the Veterans Administration in West Orange, New Jersey, from 2003 to 2004.
Dr. Farag completed his Internal Medical Residency at New York Hospital, Queens, New York, between 2000 and 2003.
Throughout his career, Dr. Farag has earned various certifications, including a medical license from the California medical board, DEA recertification (awaiting approval), Internal Medicine Board Certification, and completing the UCSF Physician Leadership Program. He has also successfully passed USMLE Steps 1, 2, and 3, as well as obtained the ECFMG Certification and Emergency Medical Technician certification.
His education includes graduating from the Ross University School of Medicine in the year 2000. He also studied at Loyola Marymount University, West Coast University, Glendale Community College, and La Canada Flintridge High School.
Beyond his professional life, Dr. John Farag possesses a diverse range of personal interests. Born on January 10, 1973, in Long Beach, California, he is fluent in English, Spanish, and Arabic. He enjoys engaging in fitness activities such as soccer, basketball, hiking, swimming, and cycling to maintain a healthy lifestyle.
Moreover, Dr. Farag is actively involved in volunteering at Saint Paul Coptic Orthodox Church in Irvine, where he dedicates his time to helping the youth. His commitment to serving others extends to missionary work, as he engaged in a mission from 2021 to 2023, focusing on supporting the youth of North Africa through the integration of the Coptic Orthodox Church. This reflects his dedication to both medicine and humanitarian causes, demonstrating a well-rounded individual committed to making a positive impact on the world.
Dr. John Farag, MD
Internist
615 E Chapman Ave
Suite #300
Orange, CA 92866
Wasim H. Raja, MD, is proud to be the primary care provider of choice for many families in and around Anaheim, Huntington Beach, Santa Ana, Garden Grove, Irvine, and Newport Beach at his practice in Fountain Valley, California. He has earned a reputation for excellence through his attention to detail and unrushed, customized approach to health care.
Dr. Raja earned his medical degree at Allama Iqbal Medical College in Lahore, Pakistan, in 1998. He went on to complete a residency through the SUNY Health Science Center in Brooklyn, New York.
After more than two decades of treating patients in clinics, hospitals, emergency rooms, intensive care units, and nursing home, Dr. Raja has an expansive body of experience. He is also skilled in telemedicine services.
As a board-certified internal medicine specialist, Dr. Raja sought out and completed additional education and training to expand his skill set. He is also a proud member of the American College of Physicians.
A firm believer in the power of personalized care, Dr. Raja takes the time to get to know his patients and their needs. He builds patient education into every interaction, empowering those in his care to take charge of their own unique health journeys. He also speaks English, Urdu, and Punjabi, and enjoys caring for patients of all backgrounds.
Dr. Raja embraces a holistic approach to health care, recognizing and honoring the connections between body, mind, community, and spirit. While he delivers care solidly rooted in science, Dr. Raja also understands the value of traditional medicine and supports patients who want to integrate alternative care into their health planning.
For those in the Fountain Valley, California, as well as surrounding areas, who are searching for outstanding primary care and family medicine specialist, taking the time to come in and meet Dr. Raja and his team is a worthy endeavor. Booking takes just moments online or over the phone.
Wasim Raja, MD
Internist
11100 Warner Ave,
Suite 110
Fountain Valley, CA 92708
Dr. Deepak Thiagarajan, MD
Internist
7974 Haven Avenue,
Suite 210
Rancho Cucamonga, CA 91730
Sooraj Shah
Internist
1640 Newport Blvd Suite 445
Costa Mesa, CA 92627
Kelly Okray, PA-C, MSPAS
Physician Assistant
1415 Rosamond Boulevard
Suite 24
Rosamond, CA 93560
Dr. Barry Buffman has been practicing since 1980 in internal medicine with a specialty in urology. He graduated from the Rush Medical College in Chicago, IL and practices with a focus on a multitude of urological issues, such as sexual dysfunction, bladder, and prostate conditions. In addition, Dr. Buffman is involved with medical research for various urological conditions. In his spare time Dr. Buffman has a passion for teleplay/screenplay, musical composition, guitar, and piano.
Dr. Barry Buffman, MD
Urologist
1415 Rosamond Boulevard
Suite 24
Rosamond, CA 93560
Kanagaratnam Sivalingam, MD, FACP, is a skilled internist at First Valley Medical Group in Lancaster, California. He has more than 40 years of experience in treating numerous acute and chronic conditions. Dr. Sivalingam spends time with patients and listens to their concerns, giving them a voice in their treatment.
Dr. Sivalingam earned his medical degree from the University of Ceylon Medical School in Peradeniya, Sri Lanka. He completed his internal medicine training at the Hospital for Joint Diseases in New York City and his residency at Vembadi Polyclinic in Ceylon, Sri Lanka.
He maintains his advanced credentials with continuing education. Dr. Sivalingam is board certified in internal medicine and licensed in the state of California. He’s a fellow of the American College of Physicians and a member of the American Medical Association, American Society of Echocardiography, American Academy of Anti-Aging Medicine, and numerous other professional organizations.
At First Valley Medical Group, Dr. Sivalingam provides premium care for patients with a variety of chronic diseases using a compassionate bedside manner. He uses the most innovative technology and procedures to provide expert treatments.
Dr. Sivalingam evaluates each patient as a whole person and offers conservative treatments whenever possible. He and his team warmly welcome patients to First Valley Medical Group and look forward to serving them.
Dr. Kanagaratnam Sivalingam, MD
Geriatrician
1415 Rosamond Boulevard
Suite 24
Rosamond, CA 93560
Brett Wertman, MD, FACC, is a triple board-certified cardiologist who is widely respected for his treatment and care for patients at Coastal Cardiology of Orange County in Ladera Ranch and Irvine, California.
Dr. Wertman, who twice has been named a Physician of Excellence by the Orange County Medical Association, also leads the Cardiac Rehabilitation Program at Hoag Hospital Irvine in Irvine.
An Orange County native, Dr. Wertman graduated summa cum laude and with Phi Beta Kappa Society honors in earning his Bachelor of Arts degrees in biochemistry and molecular, cellular, and developmental biology from the University of Colorado Boulder in Boulder, Colorado.
Dr. Wertman then completed his medical degree from the University of Washington in Seattle, Washington, and went on to finish his internship and residency training in internal medicine at Ronald Reagan UCLA Medical Center in Los Angeles, California.
He completed his fellowship training in cardiology and interventional cardiology at Cedars-Sinai Medical Center, also in Los Angeles.
Dr. Wertman has authored numerous publications in leading peer-reviewed journals and participated in live case transmissions to national meetings, demonstrating new techniques in the treatment of coronary artery disease and valvular heart disease.
Dr. Wertman is highly trained in the percutaneous treatment of valvular heart disease, including aortic valve replacement using the Edwards Sapien heart valve system, as well as mitral valve repair using the Abbott MitraClip™ system. He also has significant experience in other novel interventional therapies.
He looks forward to welcoming new patients and offering superior care to those returning to Coastal Cardiology of Orange County.
In Dr. Wertman’s spare time, he enjoys relaxing with his family, traveling, and exercising.
Dr. Brett Wertman, MD
Internist
16305 Sand Canyon Ave
Suite 255
Irvine, CA 92618
Dr. Nguyen grew up in Irvine and received his Bachelor of Arts in biology from the University of California, Irvine.
He then earned a master's in applied physiology and earned his medical degree from Chicago Medical School, one of the graduate schools of the Rosalind Franklin University of Medicine and Science in North Chicago, Illinois.
Back in Orange County, he completed his internship and residency in internal medicine, as well as his fellowship training in general cardiology, all at UC Irvine Medical Center in Orange, California.
He then moved to New York to complete his interventional cardiology fellowship at Mount Sinai Hospital in New York City, where he was awarded Outstanding Interventional Cardiology Fellow of the Year.
Throughout the course of his training, Dr. Nguyen has given numerous lectures and presentations, and has authored publications in peer-reviewed journals on various topics in both general and interventional cardiology.
He was involved with and participated in live case demonstrations at Mount Sinai Hospital, focusing on complex coronary interventions.
Dr. Nguyen believes in a patient-centric approach to cardiovascular care and focuses on the collaborative efforts with his patients in optimizing their outcomes.
In his spare time, Dr. Nguyen enjoys spending time with his family, watching movies, playing basketball, and surfing.
Dr. Huy Nguyen, MD
Internist
16305 Sand Canyon Ave
Suite 255
Irvine, CA 92618