Find a Top Internist Near Me in Riverside, CA – Book an Appointment Instantly

The office of Melanchton A. Mangoba, MD, offers comprehensive internal medicine services to the Riverside, California, community. The health care team specializes in diagnosing and treating a variety of acute and chronic diseases in adults. They also focus on preventive health services and annual wellness exams to reduce risk factors for long-term health complications through individually tailored Healthy Plans.

As a board-certified internal medicine physician, Dr. Mangoba provides primary care services to manage hypertension, renal failure, diabetes, and other chronic diseases. He and his team also focus on the specialized needs of geriatric patients. They diagnose and treat conditions like dementia with respect and dignity.

The office of Melanchton A. Mangoba, MD, has the latest diagnostic testing technologies to give patients answers to their health questions as soon as possible. The team takes a patient-focused approach to health care and provides preventive resources to support long-term health and wellness. Dr. Mangoba strives to provide the highest quality of patient care and enjoys building a strong foundation for patient-physician relationships.

If you’re looking for a compassionate internal medicine physician, schedule an evaluation online or by calling Melanchton A. Mangoba, MD, today.

At Advanced Cardiovascular Care, Inc., we believe the best heart health combines medical expertise, state of the art technology, and most importantly personalized, compassionate care.

With convenient locations, our staff serves the Inland Empire of Southern California including: San Bernadino, Redlands, Loma Linda, Banning, Beaumont, Riverside, Moreno Valley, Perris, Murrieta, Temecula, Corona, Norco, Eastvale, Lake Arrowhead, Big Bear, and Victorville.

Since 2005 our patients have enjoyed excellent heart and vascular care based on our philosophy of using the latest and most advanced medical knowledge and skill, technology, and genuine concern to help you enjoy life. Don't just live life, love it.

We provide individualized, personal care at its best

When it comes to your heart care, you want a practice that takes the time to get to know you better and make sure that you are completely comfortable with the care you receive. You need a cardiologist who along with his staff would not only provide you with the latest knowledge but also be adept with the most recent technical skills required to take the best care of you as an individual. Our cardiologists are energetic, passionate, and dedicated individuals who are also highly trained not only in the heart but also vascular diseases and interventions.

We have always practiced cardiology with one question in our minds … If we were the patient, how would we want to be treated? The answer is that we would want to be treated with personal, affectionate care, putting our needs first, offering us a healthy heart with a good quality of life. So that is how you can expect to be treated at our office. We love to interact with our patients and provide them with the compassionate and personalized care, individualized to their needs, for their most vital aspect of their lives: their heart.

Our Mission

To provide safe, high quality, personalized, compassionate and cost-effective healthcare services resulting in excellent patient outcomes

Our Vision

To be the leader in the community providing par excellence heart and vascular care to our patients utilizing evidence-based medicine and the latest fund of knowledge.

Our Values

• We strive to uphold an exceptional level of personalized service delivered with the utmost compassion and professionalism.
• We believe in an unwavering commitment to improving the treatment and lives of the patients we serve through the highest standards of clinical care.
• We believe in the empowerment of and investment in our employees to perform with absolute integrity, honesty, and reliability.

Qais Ayouby, MD, is an accomplished internal medicine specialist practicing at Alertive Healthcare Medical Group in Riverside, California. At the practice, he provides patients with compassionate and effective care. 

Dr. Ayouby completed his medical degree with honors in 2016 and has since accrued more than seven years of diverse medical experience. He has an impressive track record in the field of internal medicine and is well-regarded among his peers and patients alike. 

Dr. Ayouby is affiliated with several hospitals in the region, including Corona Regional Medical Center and Temecula Valley Hospital in California. He also collaborates with many other doctors and specialists in various medical groups, demonstrating his commitment to providing comprehensive patient care. 

In addition to his professional achievements, Dr. Ayouby enjoys spending his free time reading and being with his family. He recently became a father to a little girl, which has brought him immeasurable joy and fulfillment. 

Dr. Ayouby's patients appreciate his compassionate approach and ability to build strong, trusting relationships. He is dedicated to staying up-to-date with the latest advancements in internal medicine and actively seeks new professional development opportunities. Dr. Ayouby is skilled, respected, and committed to delivering the highest quality care to his patients. 

At her friendly and welcoming office, Dr. Hedyeh M. Golshan has treated many Rialto and San Bernardino county, California residents. A board-certified internist, Dr. Golshan is highly trained in her field and provides a number of different services for patients.

Dr. Golshan studied medicine at the University of Leeds in England, where she earned both a Bachelor of medicine degree and a Bachelor of surgery degree. After finishing medical school, she attended Wayne State University in Michigan to complete her residency in internal medicine. Today, Dr. Golshan is proud to be board-certified by the American Board of Internal Medicine and a member of the American College of Physicians.

In addition to specializing in internal medicine which manages chronic illnesses, geriatric care and women’s health services she also provides the following:

• weight loss management
• laser hair removal
• laser treatment for varicose veins
• acne scar treatment
• treatment for pigmented lesions

Many of the patients who have come to Dr. Golshan’s office highly recommend her to others in the area.

Deepak ThiagaRajan, MD, is a highly regarded board-certified primary care internist. Dr. Thiaga Rajan provides primary care and geriatric medicine services at Rajan Medical Group for adults in and around the Inland Empire. He takes a holistic, patient-centered approach to managing acute and chronic health conditions.

Dr. ThiagaRajan earned his medical degree at St. George's University School of Medicine in Grenada, West Indies. He continued his internal medicine training with a residency at Norwalk Hospital - Yale School of Medicine in Norwalk, Connecticut. Dr. ThiagaRajan also received his geriatric medicine fellowship training at The Warren Alpert Medical School of Brown University’s Rhode Island Hospital in Providence, Rhode Island.

Prior to starting his private practice, Dr. ThiagaRajan served as the medical director for several hospitals throughout California. He co-authored multiple published medical articles that outline geriatric health concerns, including chronic disease management and elder abuse. Dr. ThiagaRajan also was a featured speaker at Brown University and Yale University hospitals and area senior centers.

Dr. ThiagaRajan was a recipient of the West Indies International Peace scholarship for multiple years and earned the United Kingdom’s International Award of His Royal Highness Duke of Edinburgh in 1996. When not serving his patients, he volunteers his medical expertise by providing geriatric health assessments to the local community.

At Rajan Medical Group, Dr. ThiagaRajan provides superior health care services that empower people to play an active role in their health. He specializes in the long-term management of chronic conditions that affect the elderly, including diabetes, arthritis, and dementia.

Richard Lam, MD, is a highly respected physician specializing in Internal Medicine and Geriatrics at Richard C Lam MD & Associates. He sees patients from two Temecula and Sun City, California, offices and provides telemedicine services.

Dr. Lam is an esteemed physician in the Diamond Valley, serving the community since 1998, and has established a thriving private practice. Throughout years of service, he has become deeply connected to the local community, building long-lasting relationships with patients and earning their trust through exceptional medical care.

He has a solid educational background and a deep commitment to patient-centered care. He completed his undergraduate studies at the University of California, Irvine, where he pursued a dual major in Biology and Chemistry and a minor in Art History. His passion for the sciences and humanities allowed him to develop a well-rounded perspective in his approach to patient care. 

Dr. Lam attended Temple University in Philadelphia for his Medical degree, graduating magna cum laude. 

He pursued residency training at UCLA-Wadsworth Veteran's Hospital, gaining Internal Medicine and Geriatrics expertise and developing a comprehensive understanding of complex medical conditions and the specific needs of older adults.

Dr. Lam understands collaboration and shared decision-making are crucial to achieving the best outcomes. By building strong patient partnerships, he ensures that unique needs, concerns, and values are considered in treatment plans. 

With an integrative approach to medicine, Dr. Lam combines evidence-based practices with a holistic understanding of patients' well-being. He is particularly interested in managing heart disease, Alzheimer's, arthritis, and diabetic care. 

Dr. Lam stays current with the latest advancements, allowing him to provide his patients with the most effective and innovative treatments. His practice offers same-day visits, demonstrating a commitment to providing timely and accessible care. Dr. Lam understands the importance of addressing urgent medical needs promptly.

His commitment to his patients extends beyond the walls of his practice. He actively engages in community outreach programs, health education initiatives, and local events to promote awareness and preventative care within the Diamond Valley area.

Dr. Lam leads a fulfilling personal life. He is happily married and a proud father of four children. In his free time, he enjoys various hobbies, including fishing, woodwork, drawing and painting, physical fitness, and traveling with his family. These activities bring him joy and contribute to his well-rounded approach to life and preventive care.

Whether addressing acute illnesses, managing chronic conditions, or providing preventive care, Dr. Lam remains committed to serving the healthcare needs with excellence and compassion.

At Express Urgent Care, Sukhvir Singh, MD, Jaspreet Singh Nanra, MD, and Amrit Pal Dhillon, PA-C and the team provide full-service health care including internal and familiy medicine to individuals and families in Diamond Bar, California, and Eastern Los Angeles County. 

Express Urgent Care offers prompt, efficient medical care. The team tries to see all patients within half an hour of initial contact to relieve uncomfortable symptoms and ensure a speedy recovery.

The Express Urgent Care team provides various services, including family medicine, women’s health, and pediatric care. But they primarily focus on acute and urgent care. 

People of all ages visit Express Urgent Care to receive treatment for a wide range of health problems, including cold symptoms and chronic disease management. The team also offers preventive medicine, including vaccines, physical exams, and specialist referrals. 

Express Urgent Care is conveniently situated and has plenty of onsite parking. The facilities are state-of-the-art and feature in-office X-rays and other diagnostic imaging technology. The team even offers wound care so patients can receive stitches or undergo minor surgical procedures without visiting the hospital.

The team is fluent in several languages, including English, Spanish, Punjabi, Hindi, and Urdu. This empowers them to serve the practice’s diverse clientele, including immigrants who’ve recently moved to the U.S. 

Express Urgent Care prides itself on providing the best, most comprehensive health care. Rather than see as many patients as possible, the providers limit the number of appointments per day, ensuring everyone has ample one-on-one time with their provider. The team never rushes appointments and takes the time to explain diagnosis and treatment options thoroughly.

Whether you recently moved to the Los Angeles area and need to establish medical care, or it’s simply time to update your vaccinations, Express Urgent Care can help. Call the office today to schedule an appointment, or book your visit online. 

Dr. Mohammed Ansari is board certified in Internal medicine and completed his residency from University of Missouri, Kansas city. He has also completed training in functional medicine from the institute of Functional Medicine (IFM), and has been trained in chronic infections from ILADS and is a Lyme literate MD. He is also very well versed in mold illness, heavy metal toxicity, environmental illnesses, hormonal imbalances just to name a few. He also considers Dr. Neil Nathan, who is one of the leading experts in environmental illnesses and mold toxicity as his mentor as he has learned from him and is also part of his mentorship program where they have group discussions on difficult cases.

Dr. Ansari’s interest in Integrative and functional medicine came from various different avenues. When he was working as assistant professor of medicine at the University of Kansas, teaching medical students and residents, he used to see the same patients in the hospital not improving on standard of care treatments and wondered about other aspects that were neglected. He then enrolled in the “Institute of functional medicine” which aligned with his philosophy of “treating the root cause of disease and not just treating the symptoms” and “using food, nutrition, lifestyle and supplements in addition to traditional medicine” to enhance the patient’s immune system and eliminate illness. One of the other inspirations to learn about environmental illness and mold toxicity also came to him when his whole family including himself were affected by mold illness from living in a moldy home. 

He is naturally a very curious individual who is always eager to learn and in his free time goes through a lot of published research to get his answers as this is his passion. Although many times intuition is needed in treating patients, he believes there is a lot of research and evidence already out there which physicians and patients can benefit from and he regularly goes over interesting articles with his colleagues to see how to improve patient outcomes.

Dr. Ansari has extensive work experience, he has worked in acute patient care for Inpatient medicine and served as an Assistant professor in Internal Medicine at the University of Kansas Medical Center from 2016 to 2021 where he taught medical students and residents. He has also worked in an outpatient setting seeing patients for various illnesses including primary care from 2021 to 2024 before deciding to open his own practice.  

Dr. Ansari has a special interest and training in treating allergies, reducing the effects of toxic chemicals, exercise physiology, nutrition, weight management, mold illness, heavy metal toxicity and Environmental medicine.

Dr. Ansari spends time with his family in his off time and enjoys reading English mysteries, science-fiction novels, reading research papers, flying radio-controlled aircraft, weight lifting and training martial arts (Jiu-Jitsu/Wrestling/Kickboxing). 

RENEW by RJ is a leading regenerative medspa with offices in Temecula and Mission Viejo, California. Whether you're seeking body contouring, skin enhancement, or hair regrowth treatment, Richard Jin, MD, PhD, specializes in tailoring each service to your unique needs and aesthetic goals. 

The practice’s comprehensive services include advanced non-surgical cosmetic treatments, ensuring that you achieve the aesthetic results you desire while maintaining a natural appearance.

Addressing hair loss is a transformative journey, and at RENEW by RJ, Dr. Jin specializes in advanced hair restoration treatments. From cutting-edge hair transplant surgery to non-surgical approaches like platelet-rich plasma (PRP) therapy and laser therapy, their solutions are tailored to rejuvenate your hair and restore your confidence.

The practice is at the forefront of injectable treatments, offering a range of options such as Botox, Dysport, Xeomin, Juvederm, Restylane, and Sculptra. Whether you're aiming to smooth out wrinkles, restore facial volume, or enhance specific features, our experienced practitioners craft personalized treatment plans for optimal and natural-looking results.

For those seeking a nonsurgical facelift, the expertise extends to PDO thread lifts. Dr. Jin and the team utilize polydioxanone threads to lift and rejuvenate the skin, providing a refreshed appearance without the need for surgery.

Recognizing the importance of holistic well-being, RENEW by RJ also offers weight loss solutions. The team understands the unique challenges individuals face on their weight loss journeys and provides personalized guidance and support.

At RENEW by RJ, Dr. Jin and his staff go beyond traditional aesthetics, focusing on the individual needs of each patient. His commitment to excellence, innovation, and patient satisfaction sets the practice apart. 

Schedule a consultation today to experience the transformative care that defines RENEW by RJ—a place where beauty meets precision and well-being. Reach out online or by phone today. 

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 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.

Mahmoud Eslami-Farsani, MD, FACC, FSCAI, is a board-certified cardiologist at Cardiology Specialists of Orange County in Santa Ana, Irvine, and Newport Beach, California. He has special interests in coronary intervention, including angioplasty, stent placement, valvuloplasty, valvular heart disease, and peripheral vascular intervention. 

Dr. Eslami-Farsani earned his medical degree from Hahnemann University in Philadelphia, Pennsylvania. He then completed his internship and residency at the University of California, Irvine Medical Center in Orange, California, before completing his interventional and cardiology fellowships at the University of Southern California in Los Angeles.

He holds board-certifications in cardiovascular disease, interventional cardiology, and internal medicine. To remain up-to-date on the latest developments in his field, Dr. Eslami-Farsani is a member of the American College of Cardiology, the American Medical Association, and the American College of Physicians. 

Dr. Eslami-Farsani is currently welcoming new patients and looks forward to partnering with them. Schedule an appointment with Dr. Eslami-Farsani by calling the office or booking online today.

Board-certified cardiologist Ethan Yalvac, MD, FACC, FSCAI, RPVI, CBNC, is proud to provide comprehensive care to patients at Cardiology Specialists of Orange County in Santa Ana, Irvine, and Newport Beach, California.

Dr. Yalvac received his Bachelor of Arts in economics and math, graduating cum laude. He earned his Doctor of Medicine from the University of Texas Medical Branch School of Medicine in Galveston. He then completed his internship and residency in internal medicine at Tulane University in New Orleans, Louisiana. Afterward, Dr. Yalvac completed a general cardiology fellowship at the Tulane University Heart and Vascular Institute before completing an interventional cardiology fellowship at the University of California, San Diego. 

He holds certification from the Board of Nuclear Cardiology in advanced cardiac life support and is Level II trained in echocardiography. Dr. Yalvac is a member of the Society for Vascular Ultrasound, and a fellow of the American College of Cardiology and the Society for Cardiovascular Angiography and Interventions.

Dr. Yalvac is affiliated with Hoag Hospital and Hoag Vascular Institute in Newport Beach, Hoag Hospital & Orthopedic Institute in Irvine, St. Joseph Hospital in Orange, and Orange County Medical Center in Santa Ana, California.

Ali Ashtiani, MD is a fellowship-trained, board-eligible interventional cardiologist at Cardiology Specialists of Orange County (CSOC) practicing in Santa Ana, Irvine, and Newport Beach, California. He has special interests in coronary intervention including coronary angioplasty & stent placement, pacemaker implantation, and valvular/structural heart disease.

Dr. Ashtiani received his medical training in our very own Orange County. After earning his medical degree from the University of California, Irvine Medical Center in Orange, California, he went on to complete internal medicine internship and residency followed by cardiology fellowship and advanced fellowship training in interventional cardiology at the same institution.


Dr. Ashtiani is affiliated with Hoag Hospital Heart and Vascular Institute in Newport Beach, Hoag Hospital Irvine, & Hoag Orthopedic Institute, St. Joseph Hospital in Orange, and Orange County Global Medical Center in Santa Ana.

Dr. Ashtiani is currently welcoming new patients and looks forward to providing individualized care with patience and compassion just as he would treat his own family. Schedule an appointment with Dr. Ashtiani by contacting our office today.

Dr Sharma Bishop MD earned her medical degree and graduated with Honors from St George’s University in Grenada. She completed her Internal medicine residency at Trinitas Regional Medical Center/Seton Hall University/ RWJ Barnabas Health in New Jersey. She specializes and is Board Certified in Internal Medicine. She has many years of experience in primary care outpatient clinics, managed care, urgent care, hospital medicine and telemedicine. She practiced Internal Medicine for years in Riverside County and currently practices in Orange County, California. She held hospital privileges at various hospitals in Riverside County. Dr. Bishop has experience in oversight of administrative responsibilities, academic medicine, risk adjustment and quality care outcomes. She has years of experience as supervising physician and Clinical Assistant Professor of Internal Medicine in Riverside County and Medical Director in Central California. She is currently Medical Director in Orange County CA.