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Internists with Great Reviews in Fontana, CA

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Verified Internists in Fontana, CA

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495 providers

Availability last updated 06/21/2026

Kelly Okray, PA-C, MSPAS
5.0
(2)
Kelly Okray, PA-C, MSPAS Physician Assistant
48.9 mi
5.0 (2)
1220 E Ave S
Suite M
Palmdale, CA 93550
View profile
About Kelly Okray, PA-C, MSPAS
Kelly Okray, PA-C has been with First Valley Medical Group since July 2022. First Valley Medical Group is
an internal medicine outpatient clinic with multiple locations. Kelly works at our Lancaster location off of
Lancaster Boulevard and 10 th street. She can help diagnose and manage various conditions including
hypertension, diabetes, thyroid conditions, heart failure and many others. Kelly can help you understand
your conditions, lab work and images, and get you connected with a specialist as needed. She is also
able to provide basic preventative women’s health care. She is passionate about preventative medicine
through diet and lifestyle changes and would love to help you get and stay healthy.
She is originally from Minnesota, relocating nearly two and a half years ago and is making Lancaster her
Practice
First Valley Medical Group
Latest Review
“Excellent care!!”
Kelly Okray, PA-C, MSPAS

Kelly Okray, PA-C, MSPAS

Physician Assistant

1220 E Ave S
Suite M
Palmdale, CA 93550

5.0 (2)
Dr. Barry Buffman, MD
5.0
(2)
Dr. Barry Buffman, MD Urologist
48.9 mi
5.0 (2)
1220 E Ave S
Suite M
Palmdale, CA 93550
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About Dr. Barry Buffman, MD

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.

Practice
First Valley Medical Group
Latest Review
“Excellent care!!”
Dr. Barry Buffman, MD

Dr. Barry Buffman, MD

Urologist

1220 E Ave S
Suite M
Palmdale, CA 93550

5.0 (2)
Dr. Kanagaratnam Sivalingam, MD
5.0
(2)
Dr. Kanagaratnam Sivalingam, MD Geriatrician
48.9 mi
5.0 (2)
1220 E Ave S
Suite M
Palmdale, CA 93550
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About Dr. Kanagaratnam Sivalingam, MD

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.

Practice
First Valley Medical Group
Latest Review
“Excellent care!!”
Dr. Kanagaratnam Sivalingam, MD

Dr. Kanagaratnam Sivalingam, MD

Geriatrician

1220 E Ave S
Suite M
Palmdale, CA 93550

5.0 (2)
Healthcare specialist
Jon Persichino, DO Infectious Disease Physician
1.2 mi
16779 Spring St.
Fontana, CA 92335

Jon Persichino, DO

Infectious Disease Physician

16779 Spring St.
Fontana, CA 92335

Healthcare specialist
Dr. Melanchton Mangoba, MD Internist
3.0 mi
7509 N Laurel Ave
Fontana, CA 92336

Dr. Melanchton Mangoba, MD

Internist

7509 N Laurel Ave
Fontana, CA 92336

Healthcare specialist
Dr. Melanchton Mangoba, MD Internist
5.4 mi
8951 Granite Hill Dr
Riverside, CA 92509

Dr. Melanchton Mangoba, MD

Internist

8951 Granite Hill Dr
Riverside, CA 92509

Healthcare specialist
Dr. Melanchton Mangoba, MD Internist
5.4 mi
1471 S Riverside Ave
Rialto, CA 92376

Dr. Melanchton Mangoba, MD

Internist

1471 S Riverside Ave
Rialto, CA 92376

Healthcare specialist
Satish Choudhary, MD Cardiovascular Disease Physician
6.1 mi
10841 White Oak Ave
Rancho Cucamonga, CA 91730

Satish Choudhary, MD

Internist

10841 White Oak Ave
Rancho Cucamonga, CA 91730

Healthcare specialist
Mihran Ask, MD Addiction Medicine Physician
6.4 mi
8300 Utica Ave Ste 310
Rancho Cucamonga, CA 91730

Mihran Ask, MD

Internist

8300 Utica Ave Ste 310
Rancho Cucamonga, CA 91730

Healthcare specialist
Satish Choudhary, MD Cardiovascular Disease Physician
6.7 mi
7974 Haven Ave Ste 200
Rancho Cucamonga, CA 91730

Satish Choudhary, MD

Internist

7974 Haven Ave Ste 200
Rancho Cucamonga, CA 91730

Healthcare specialist
Hamza Gohar, DO Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Hamza Gohar, DO

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Mehdi Manzari, MD Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Mehdi Manzari, MD

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Manvir Wadhwa, MD Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Manvir Wadhwa, MD

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Omar Khattab Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Omar Khattab

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Christine Mikhail, MD Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Christine Mikhail, MD

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Komail Mujtaba Ali, MBBS Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Komail Mujtaba Ali, MBBS

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Samia Faiz, MD Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Samia Faiz, MD

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501

Healthcare specialist
Ali Mahdi Internist
8.2 mi
4354 Latham St. Ste# 100
Riverside, CA 92501

Ali Mahdi

Internist

4354 Latham St. Ste# 100
Riverside, CA 92501