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Belen C. Leong, MD

Photo of Belen C. Leong, MD

My specialty:
Pediatrics Developmental

My provider affiliation:
Kaiser Permanente provider

I speak: English, Tagalog

My gender: Female


Find out about

Where I practice

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  • Emergency service
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  • Pharmacy services
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About me

Welcome to my Web page. As my patient or the parent of my patient, you will sometimes share information about yourself and your family with me. I hope that the information presented here will make you feel comfortable having me as your or your child's physician.


I wanted to be a physician from the time I was 5. My father, who dealt with a lot of physicians, brought a stethoscope and a blood pressure meter home for me to play with. Every time somebody got hurt in my neighborhood, I was the first kid to look at how others dealt with the patient. My friends and I always played house and I ended up being the doctor, the nurse, or the mother with a sick kid. I've been able to fulfill my wish to help others every single day of the 24 years I have been a physician with Kaiser Permanente. I was born in the Philippines, received a bachelor's of science degree in pharmacy, and passed my pharmacy board exam while I was in the first year of my medical education. After passing the medical board and completing an internship in my country, I became a missionary doctor in Thailand for one and a half years. I then immigrated to the United States and did my pediatric residency and neurology fellowship at Loma Linda University Medical Center.

About my practice

I am one of several physicians at Kaiser Permanente in Fontana who run the learning and behavior clinic. We work with children who have attention deficit disorder or attention deficit hyperactivity disorder, learning difficulties or disabilities, behavioral and/or emotional problems, autism, and developmental delays. Having the opportunity to help these children is gratifying because I become a participant in shaping their lives. When you have helped a child, you actually have helped the whole family. Sometimes, just my listening to my patients and their parents is therapeutic for them. I care a lot about these special children and they need us, parents, teachers, physicians, and friends to help them discover a sense of value and purpose in their lives. Everyone is valuable and has a purpose on this earth.

How I thrive

I am an active person and am constantly doing something. I love gardening, cooking, traveling, crocheting, and arranging flowers. When I find the time or run out of things to do (which rarely happens), I read biographical novels. A day never passes without my giving thanks to God. I owe everything that I am and have to Him. I try to look at what is positive in everyone or in any misfortunes. My motto has always been; If there's a will, there's a way. I think positive thoughts, try to solve problems, and avoid creating problems for myself and others. I come short of expectations as others do but I always try again and do it better the next time. God-willing I am doing exactly that.

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My office

Languages spoken by medical staff

Help is available in your language. Learn more.

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My provider type

Physicians and Surgeons

Medical groups and plans

Southern California Permanente Medical Group

List Header Plans Accepted
  • Exclusive Provider Organization (EPO)
  • HMO
  • Medi-Cal Managed Care
  • Point-of-Service Plan (POS)
  • Senior Advantage/Medicare Cost
Pediatrics Department
9961 Sierra Ave, Fontana, CA 92335

Contact information

  • Appointments/information
  • 1-833-574-2273 (1-833-KP4CARE) (toll free)
  • Information
  • 1-866-735-2922 (toll-free TTY for the hearing/speech impaired)

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My training, certifications and licensing

Medical school

University of the East Medical Center
Quezon City , Philippines

Board certification

This information is not available at this time.

Medical training



Loma Linda University Medical Center
Loma Linda , CA



Loma Linda University Medical Center
Loma Linda , CA


Pediatric Neurology

Loma Linda University Medical Center
Loma Linda , CA

Joined Permanente Medical Group


Active license information

License number


License type


License issuing state


National Provider Identifier (NPI)

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My hospitals

This information is not available at this time.

To find:

  • a provider's office hours, search our facility directory
  • providers in your plan or accepting new patients, call 1-800-464-4000 (toll free) or 711 (TTY for the hearing/speech impaired)

The information in this online directory is updated periodically. The availability of physicians, hospitals, providers, and services may change. Information about a practitioner is provided to us by the practitioner or is obtained as part of the credentialing process. If you have questions, please call us at 1-800-464-4000 (toll free). For the hearing and speech impaired: 1-800-464-4000 (toll free) or TTY 711 (toll free). You can also call the Medical Board of California at 916-263-2382, or visit their website.

We want to speak to you in the language that you’re most comfortable with when you call or visit us. Qualified interpreter services, including sign language, are available at no cost, 24 hours a day, 7 days a week during all hours of operations at all points of contact. We do not encourage the use of family, friends or minors as interpreters. Only the services of interpreters and qualified staff are used to provide language assistance. These may include bilingual providers, staff, and healthcare interpreters. In-person, telephone, video, and alternative modes of communication are available. Learn more about interpreter services

If you would like to report an error in provider or facility information, please contact us.

Kaiser Permanente enrollees have full and equal access to covered services, including enrollees with disabilities as required under the Federal Americans with Disabilities Act of 1990 and Section 504 of the Rehabilitation Act of 1973.

Kaiser Permanente uses the same quality, member experience, or cost-related measures to select practitioners and facilities in Marketplace Silver-tier plans as it does for all other Kaiser Foundation Health Plan (KFHP) products and lines of business.The measures may include, but are not limited to, HEDIS/CAHPS performance, member/patient complaints, patient safety scores, hospital quality measures, and geographic need. Members enrolled in KFHP Marketplace plans have access to all professional, institutional and ancillary health care providers who participate in KFHP plans’ contracted provider network, in accordance with the terms of members’ KFHP plan of coverage. All Kaiser Permanente Medical Group physicians and network physicians are subject to the same quality review processes and certifications.
Kaiser Permanente uses the same geographic distribution consideration to select hospitals in Marketplace plans as it does for all other Kaiser Foundation Health Plan (KFHP) products and lines of business. Accessibility of medical offices and medical centers in this directory: All Kaiser Permanente facilities are accessible to members.


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