
Kelly Okray, PA-C, MSPAS
Physician Assistant
6570 W. Avenue L-12
Lancaster, CA 93536
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633 providers
Availability last updated 09/18/2025
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
Kelly Okray, PA-C, MSPAS
Physician Assistant
42357 50th St West
Suite 107
Quartz Hill, 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
42357 50th St West
Suite 107
Quartz Hill, CA 93536
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
42357 50th St West
Suite 107
Quartz Hill, CA 93536
Shahriar Jarchi, MD
Internist
11500 Dolan Ave
Downey, CA 90241
Selma Prechel, OD
Internist
13640 Clark Avenue
Bellflower, CA 90706
Selma Prechel, OD
Internist
7002 E Gage Avenue
Bell, CA 90201
Selma Prechel, OD
Internist
10631 Briar Street
Norwalk, CA 90650
Selma Prechel, OD
Internist
10625 Lessingwell Road
Los Angeles, CA 90035
Selma Prechel, OD
Internist
11262 Hoback Avenue
Norwalk, CA 90650
Selma Prechel, OD
Internist
16446 Woodruff Ave Ste
Bellflower, CA 90706
Anooshiravan Hami, MD
Pulmonologist
13222 Bloomfield Ave
Norwalk, CA 90650
Selma Prechel, OD
Internist
11527 Baylor
Norwalk, CA 90650
Selma Prechel, OD
Internist
3232 E Artesia Blvd
Long Beach, CA 90805