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Internists with Great Reviews in Lake Forest, CA

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Verified Internists in Lake Forest, CA

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240 providers

Availability last updated 10/01/2026

Healthcare specialist
Mihran Ask, MD Addiction Medicine Physician
31.2 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
Dr. Rafael Penunuri, MD Internist
31.2 mi
24060 Fir Ave
Suite A
Moreno Valley, CA 92553
About Dr. Rafael Penunuri, MD

Heacock Urgent Care is a walk-in urgent care clinic providing comprehensive testing services and exceptional patient care to children, adults, and seniors in Moreno Valley, California. 

The caring team at Heacock Urgent Care has the experience and education to meet a variety of acute illness and injury needs. They’re always ready and happy to help with getting you the answers you need for personalized treatment. 

The practice routinely sees patients for sports injuries. They help patients work toward their goal of complete healing and rehabilitation so they can continue working and engaging in physical activity. 

COVID-19 testing and vaccinations are also available on-demand, as well as professional care for sinus infections, cold and flu, dehydration, and ear infections. 

Heacock Urgent Care values their community and encourages patients of all ages to visit for all of their mild to moderate medical needs. Schedule an appointment over the phone or online, or walk in for care any time during clinic hours.

Practice
Heacock Urgent care

Dr. Rafael Penunuri, MD

Internist

24060 Fir Ave
Suite A
Moreno Valley, CA 92553

Healthcare specialist
Satish Choudhary, MD Cardiovascular Disease Physician
31.3 mi
10841 White Oak Ave
Rancho Cucamonga, CA 91730
+1 more location

Satish Choudhary, MD

Internist

10841 White Oak Ave
Rancho Cucamonga, CA 91730

Dr. Erica Chen, MD
4.9
(213)
Dr. Erica Chen, MD Allergist
31.9 mi
4.9 (213)
1250 S. Sunset Ave
Suite 340
West Covina, CA 91790
About Dr. Erica Chen, MD

Erica Chen, MD, is a board-certified allergy and immunology specialist practicing at the Allergy and Asthma Specialist Doctors, Inc. location in West Covina, California. Her practice is centered around the treatment of allergic diseases, including nasal allergies and asthma.

Dr. Chen earned her medical degree from the Keck School of Medicine at the University of Southern California. Subsequently, she completed her combined internal medicine pediatric residency and allergy and immunology fellowship training at the Los Angeles County Hospital at the University of Southern California.

Dr. Chen is board certified by the American Board of Allergy and Immunology. She has contributed to multiple peer-reviewed scientific presentations and publications. She also holds numerous professional society memberships, including the American Academy of Allergy Asthma and Immunology and the American College of Allergy, Asthma and Immunology.

Dr. Chen is currently accepting new patients and looks forward to welcoming them to Allergy and Asthma Specialist Doctors, Inc.

Practice
Allergy and Asthma Specialist Doctors, Inc.
Latest Review
“Thank you Dr. Chen”
Dr. Erica Chen, MD

Dr. Erica Chen, MD

Allergist

1250 S. Sunset Ave
Suite 340
West Covina, CA 91790

4.9 (213)
Dr. Maged Tanios, MD
Dr. Maged Tanios, MD Internist
32.0 mi
3605 Long Beach Boulevard
Suite 405
Long Beach, CA 90807
About Dr. Maged Tanios, MD

Dr. Maged Tanios serves as the Regional Medical Director of Sound Physicians and is the current director of the ICU and Intensivists Program at Long Beach Medical Center. Dr. Tanios is a Board-Certified physician who specializes in pulmonary medicine, critical care, and sleep medicine. At Southern California Pulmonologists and Intensivists Network of Sound Physicians, the doctor and his staff serve the residents of Long Beach, California, and many neighboring communities. Dr. Tanios has been practicing medicine in Southern California for almost 15 years. He is a pillar in the local medical community and serves on many hospital boards and committees in the Long Beach area.

After completing his internal medicine residency, Dr. Tanios went on to complete several fellowships including three at Tufts-New England Medical Center in sleep medicine, critical care medicine, and pulmonary medicine. In addition to earning his medical degree, Dr. Tanios earned a Master of Public Health (MPH) in Health Services Management & Policy from Tufts University School of Medicine and is completing an MBA in Healthcare Management at Johns Hopkins Carey Business School.

Dr. Tanios is also an accomplished associate professor of medicine at David Geffen School of Medicine at UCLA. Dr. Tanios received the Golden Apple Award for Teaching excellence from the Family Medicine program at Long Beach Medical Center and the Munzer Family Award for Research and Literary accomplishment from the Memorial Medical Center Foundation.

Dr. Tanios has received numerous achievements and awards for his work. He has been recognized by the American Lung Association and has also applied for and received grants from the National Institutes of Health. Most recently, Dr. Tanios was selected to the 2016 registry of “America’s Best Physicians.” He has also been listed on Southern California Super Doctors for the consecutive years of 2016-2021.

Dr. Tanios is a member of the American Thoracic Society, the American College of Chest Physicians, and the Society of Critical Care Medicine.

Practice
SoCal Pulmonologists and Intensivists Network of Sound Physicians
Dr. Maged Tanios, MD

Dr. Maged Tanios, MD

Internist

3605 Long Beach Boulevard
Suite 405
Long Beach, CA 90807

Joao Ferraz, MD
Joao Ferraz, MD Internist
32.0 mi
3605 Long Beach Boulevard
Suite 405
Long Beach, CA 90807
About Joao Ferraz, MD

Joao Ferraz, MD, is a fellowship-trained Critical Care Medicine specialist at Long Beach Medical Center. He completed his fellowship in Critical Care Medicine at Baylor College of Medicine in Houston, Texas, where he received extensive training in the management of critically ill patients, including advanced mechanical ventilation, hemodynamic support, and cardiovascular critical care.

Prior to fellowship, Dr. Ferraz practiced as a hospitalist at Cleveland Clinic in Cleveland, Ohio. He completed his Internal Medicine residency in Chicago and earned his medical degree from the University of São Paulo in Brazil.

Dr. Ferraz has particular interests in mechanical ventilation, respiratory failure, hemodynamics, cardiovascular critical care, and the care of patients with complex multisystem illnesses. His training also includes extensive experience with advanced mechanical circulatory support, including ECMO, ventricular assist devices, and other temporary mechanical support systems.

In addition to his clinical work, Dr. Ferraz is involved in medical education, clinical research, and quality improvement. He has published several peer-reviewed studies focused on the management of critically ill patients with respiratory failure and continues to pursue research aimed at improving evidence-based care and outcomes in the intensive care unit.

Originally from Brazil, Dr. Ferraz is fluent in English, Portuguese, Spanish, and French. Outside of medicine, he enjoys tennis, skiing, traveling, and spending time with his family.

Practice
SoCal Pulmonologists and Intensivists Network of Sound Physicians
Joao Ferraz, MD

Joao Ferraz, MD

Internist

3605 Long Beach Boulevard
Suite 405
Long Beach, CA 90807

Healthcare specialist
Alan Frischer, MD Internist
32.6 mi
11480 Brookshire Avenue
200
Downey, CA 90241

Alan Frischer, MD

Internist

11480 Brookshire Avenue
200
Downey, CA 90241

Healthcare specialist
William Sim, MD Internist
32.6 mi
11480 Brookshire Avenue
200
Downey, CA 90241

William Sim, MD

Internist

11480 Brookshire Avenue
200
Downey, CA 90241

Healthcare specialist
Laura Ryan, MD Internist
32.6 mi
11480 Brookshire Avenue
200
Downey, CA 90241

Laura Ryan, MD

Internist

11480 Brookshire Avenue
200
Downey, CA 90241

Healthcare specialist
Jon Persichino, DO Infectious Disease Physician
33.3 mi
16779 Spring St.
Fontana, CA 92335

Jon Persichino, DO

Infectious Disease Physician

16779 Spring St.
Fontana, CA 92335

Healthcare specialist
Tariq Kelker, MD Critical Care Medicine
34.3 mi
1550 E Washington St
Colton, CA 92324

Tariq Kelker, MD

Internist

1550 E Washington St
Colton, CA 92324

Healthcare specialist
Dr. Oliver Solomon, DO Internist
34.3 mi
130 W Route 66 Ste 308
Glendora, CA 91740

Dr. Oliver Solomon, DO

Internist

130 W Route 66 Ste 308
Glendora, CA 91740

Dr. Paul Moya, DO
Dr. Paul Moya, DO Family Physician
34.8 mi
210 S Grand Ave
#415
Glendora, CA 91741
About Dr. Paul Moya, DO

Paul Moya, DO, is a board-certified family medicine physician who has been proudly serving Glendora, California, and the surrounding communities for more than 13 years. As part of United Family Physicians, Dr. Moya provides comprehensive care across all stages of life, with special expertise in preventive medicine, geriatric care, and the management of both acute and chronic medical conditions.

After earning his medical degree from Western University of Health Sciences in Pomona, California, Dr. Moya completed his internship and residency at Pomona Valley Hospital, a UCLA-affiliated program. Today, he partners with Emanate Health, Regal Medical Group and Lakeside Community Healthcare, giving his patients access to a vast network of specialists, leading hospitals, labs, and support services designed to make quality care accessible and seamless.

Dr. Moya believes in building lasting relationships with patients and their families through personalized education, preventive care, and individualized treatment plans. His approach is compassionate, approachable, and rooted in a dedication to long-term wellness. He is fluent in Spanish and is affiliated with Foothill Presbyterian Hospital, extending his reach in providing trusted medical care.

Outside of medicine, Dr. Moya enjoys gardening, hiking, and cooking. Patients appreciate his commitment to listening, understanding, and guiding them through every stage of their health journey. By combining clinical excellence with a caring bedside manner, Dr. Moya continues to make a meaningful difference in the lives of those he serves.

Practice
United Family Physicians
Dr. Paul Moya, DO

Dr. Paul Moya, DO

Family Physician

210 S Grand Ave
#415
Glendora, CA 91741

Dr. Khanh Thai, DO
Dr. Khanh Thai, DO Family Physician
34.8 mi
210 S Grand Ave
#415
Glendora, CA 91741
About Dr. Khanh Thai, DO

Bao Khanh Thai, DO, is a board-certified family medicine physician with more than 13 years of experience. She serves patients at United Family Physicians in Glendora, California, providing comprehensive care for patients of all ages, with a special focus on preventive medicine, chronic disease management, and senior care. Known for her compassionate and approachable style, Dr. Thai is dedicated to building long-term partnerships with her patients and their families.

Dr. Thai earned her medical degree from Western University of Health Sciences in Pomona, California, and completed her internship and residency training at Pomona Valley Hospital, a UCLA-affiliated program. She is fluent in Vietnamese, allowing her to serve a diverse patient population and make quality healthcare more accessible to the community.

Through her affiliation with Emanate Health, Regal Medical Group, and Lakeside Community Healthcare, Dr. Thai’s patients benefit from access to leading hospitals, specialists, labs, imaging facilities, and chronic care support programs. She also maintains hospital privileges at Foothill Presbyterian Hospital, ensuring continuity of care when patients need it most.

In addition to her clinical expertise, Dr. Thai emphasizes patient education and preventive care, empowering individuals to make informed decisions about their health.

In her free time, she enjoys gardening, hiking, and traveling, bringing the same curiosity and care to her personal life as she does to her practice. Patients trust Dr. Thai for her dedication to personalized, high-quality care that supports overall well-being at every stage of life.

Practice
United Family Physicians
Dr. Khanh Thai, DO

Dr. Khanh Thai, DO

Family Physician

210 S Grand Ave
#415
Glendora, CA 91741

Richard Jin, MD
Richard Jin, MD Internist
35.1 mi
44045 Margarita Rd.
Suite 103
Temecula, CA 92592
Richard Jin, MD

Richard Jin, MD

Internist

44045 Margarita Rd.
Suite 103
Temecula, CA 92592

Healthcare specialist
Edmond Derderian, MD Internist
35.9 mi
3621 Martin Luther King Jr Blvd
#6
Lynwood, CA 90262

Edmond Derderian, MD

Internist

3621 Martin Luther King Jr Blvd
#6
Lynwood, CA 90262

Healthcare specialist
Alejandro Gonzalez General Practice Physician
36.1 mi
4225 Tweedy Blvd
South Gate, CA 90280

Alejandro Gonzalez

General Practice Physician

4225 Tweedy Blvd
South Gate, CA 90280

Healthcare specialist
Reza Ghanian, MD Internist
36.4 mi
456 E Carson St
Carson, CA 90745

Reza Ghanian, MD

Internist

456 E Carson St
Carson, CA 90745