697 Internists Found in Ontario, CA – Page 8

We found 697 Internists available in Ontario, CA with an average 4 stars across 4,002 reviews. Find the best one for your needs by years of experience, distance, reviews on Vitals, and more through the filters provided below. Currently, 335 Internists listed are accepting new patients and 295 accept Medicare. Showing 421 to 480 of 697 Internists.

Filter Internists Results

Featured Results

Dr. Lakshita Gupta, MD

Internal Medicine
11 years exp
Accepting New Patients
Upland, CA3.3 mi
Dr. LAKSHITA GUPTA, MD is a BOARD CERTIFIED INTERNISTDr. Lakshita Gupta is an internal medicine physician at Rancho Wellness, serving patients at both the Rancho Cucamonga and Upland locations. View Profile

Dr. Karanbir Brar

Geriatric Medicine
Spent time with me
16 years exp
Accepting New Patients
Virtual Visit available
Oceanside, CA
"I am always looking for doctors who are focused on prevention and providing the highest level of care and concern, Dr, Brar was extremely well intentioned in his ability to guide me to certain tests and health strategies to get some of my markers under control and also recc some advanced new tests to truly allow us to establish a strong prevention plan." View Profile

Dr. Adama Diarra, DO

Internal Medicine
Had a good bedside manner
14 years exp
Accepting New Patients
Virtual Visit available
Tigard, OR
"Dr. Adama Diarra was my 84 year old father's PCP. Dr. Diarra was very pro-active in adjusting his medications as his disease sates progressed and his kidney function declined." View Profile

Eric Harker

Internal Medicine
Spent time with me
25 years exp
Accepting New Patients
Virtual Visit available
Lyons, CO
"He now practices at Iora Primary Care in Arvada. Excellent." View Profile

Dr. Tooba Rehman, MD

Internal Medicine
16 years exp
Accepting New Patients
Virtual Visit available
Katy, TX
Dr. Tooba Rehman is a board-certified Internal Medicine physician and the founder of Doc & Me Health, a direct primary care practice built on a membership model that replaces rushed, insurance-driven visits with unhurried, relationship-first care. View Profile

Dr. Samantha Von Ins, MD

Family Medicine
Flexible scheduling
16 years exp
Accepting New Patients
Virtual Visit available
Placentia, CA
"Her staff is so friendly and courteous. The new office in Placentia is soooo beautiful! Dr. Von Ins is so thorough, patient, and very knowledgeable. Love her!!" View Profile

Dr. Tamar Heisler

Pediatrics
18 years exp
Accepting New Patients
Virtual Visit available
Franklin, TN
Dr. Tami Heisler is a Board-Certified Pediatrician with over 10 years of experience providing compassionate and personalized care to children and their families at As You Are. View Profile

Dr. Lubna Isho, DO

Family Medicine
Gave an accurate diagnosis
1 Award
25 years exp
Accepting New Patients
Virtual Visit available
POMONA, CA
"She's a very good doctor, very helpful and informative. They are also very quick on sending out refferals to see other specialist 5/5" View Profile

All Results

Dr. Ali Salem, MD

Internal Medicine
17 years exp
Upland, CA3.4 mi
Dr. Ali Salem, MD is a health care provider primarily located in Upland, CA, with other offices in Montclair, CA and Montclair, CA(and 6 other locations). View Profile

Dr. Samir Samarany, MD

Cardiovascular Disease
20 years exp
Accepting New Patients
Upland, CA3.4 mi
Dr. Samir Samarany, MD is a health care provider primarily located in Upland, CA, with another office in Upland, CA. They have 20 years of experience. View Profile

Dr. Steven Nyein Win, MD

Internal Medicine
35 years exp
Accepting New Patients
RANCHO CUCAMONGA, CA6.2 mi
Dr. Steven Nyein Win, MD is a health care provider primarily located in RANCHO CUCAMONGA, CA. He has 35 years of experience. His specialties include Internal Medicine. View Profile

Dr. Leonidas Voltaire Mejia, MD

Internal Medicine
34 years exp
Accepting New Patients
Chino, CA3.9 mi
Dr. Leonidas Voltaire Mejia, MD is a health care provider primarily located in Chino, CA, with another office in Chino, CA. He has 34 years of experience. View Profile

Dr. Ray Atiga Silao, MD

Internal Medicine
36 years exp
Chino Hills, CA7.7 mi
Dr. Ray Atiga Silao, MD is a health care provider primarily located in Chino Hills, CA, with another office in Yuma, AZ. He has 36 years of experience. View Profile

Dr. Jacqueline T Do, MD

Internal Medicine
35 years exp
Accepting New Patients
Rancho Cucamonga, CA4.2 mi
Dr. Jacqueline T Do, MD is a health care provider primarily located in Rancho Cucamonga, CA. She has 35 years of experience. Her specialties include Internal Medicine. View Profile

Dr. Jyoji Takata Bristol

Internal Medicine
28 years exp
Chino Hills, CA8.2 mi
"Friendly, thorough, knowledgeable, and on time." View Profile

Dr. Khashayar Sarabi, MD

Internal Medicine
24 years exp
RANCHO CUCAMONGA, CA3.7 mi
Dr. Khashayar Sarabi, MD is a health care provider primarily located in RANCHO CUCAMONGA, CA, with other offices in Loma Linda, CA and Irvine, CA(and 11 other locations). View Profile

Dr. Nehal Gordhan Patel, MD

Geriatric Medicine
28 years exp
Chino, CA3.9 mi
"As a nurse that has worked with Dr. Patel in a Hospice home care setting, I can tell you that he is very good at what he does. He shows kindness and compassion to his patients." View Profile

Dr. Adina Tanasescu, MD

Nephrology
35 years exp
Accepting New Patients
Rancho Cucamonga, CA4.2 mi
"When I first met Dr. T, she looked at my numbers and of course asked several diagnostic questions." View Profile

Dr. Larry Chee Chan, MD

Interventional Cardiology
19 years exp
Accepting New Patients
UPLAND, CA3.4 mi
Dr. Larry Chee Chan, MD is a health care provider primarily located in UPLAND, CA, with other offices in UPLAND, CA and Upland, CA. He has 19 years of experience. View Profile

Dr. Erlinda To Uy-Concepcion, MD

Internal Medicine
Upland, CA3.8 mi
Dr. Erlinda To Uy-Concepcion, MD is a health care provider primarily located in Upland, CA. Their specialties include Internal Medicine. View Profile

Dr. Frankie Diao Utzurrum, MD

Internal Medicine
59 years exp
Accepting New Patients
Upland, CA3.5 mi
Dr. Frankie Diao Utzurrum, MD is a health care provider primarily located in Upland, CA. He has 59 years of experience. His specialties include Internal Medicine, Pulmonology. View Profile

Dr. Frank Jin-Yang Hsu, MD

Critical Care Medicine
54 years exp
Montclair, CA4.4 mi
Dr. Frank Jin-Yang Hsu, MD is a health care provider primarily located in Montclair, CA. He has 54 years of experience. View Profile

Dr. Ashok Kumar Madahar, MD

Emergency Medicine
48 years exp
Chino, CA3.9 mi
Dr. Ashok Kumar Madahar, MD is a health care provider primarily located in Chino, CA. He has 48 years of experience. His specialties include Internal Medicine, Emergency Medicine. View Profile

Dr. Airani Sathananthan, MD

Endocrinology, Diabetes & Metabolism
23 years exp
Pomona, CA7.3 mi
"I love the Dr. S. takes plenty of time with you to not only understand herself what is going on, but to explain so you understand as well." View Profile

Dr. Jatin Narendra Amin, MD

Cardiovascular Disease
35 years exp
Accepting New Patients
Montclair, CA4.4 mi
Dr. Jatin Narendra Amin, MD is a health care provider primarily located in Montclair, CA, with other offices in Riverside, CA and Corona, CA(and 4 other locations). View Profile

Dr. Jose Alejandro Lira, MD

Internal Medicine
56 years exp
Accepting New Patients
Chino, CA3.8 mi
Dr. Jose Alejandro Lira, MD is a health care provider primarily located in Chino, CA. He has 56 years of experience. His specialties include Internal Medicine, Family Medicine. View Profile

Dr. John Michael Finley, DO

Rheumatology
40 years exp
Chino, CA3.9 mi
Dr. John Michael Finley, DO is a health care provider primarily located in Chino, CA, with other offices in Chino, CA and CHINO, CA. He has 40 years of experience. View Profile

Dr. Gianna Nasrin Ohara

Internal Medicine
Pomona, CA7.3 mi
"Excellent Excellent Dr. O'Hara is a doctor that not only helps you, but listens to you. She's the perfect doctor to have for the senior citizens. Very patient and loving." View Profile

Dr. Rahul Ramesh Naik, MD

Oncology
20 years exp
Accepting New Patients
CHINO HILLS, CA8.4 mi
Dr. Rahul Ramesh Naik, MD is a health care provider primarily located in CHINO HILLS, CA, with other offices in Bakersfield, CA and CHINO HILLS, CA(and 2 other locations). View Profile

Dr. Dan Lee, MD

Diagnostic Radiology
24 years exp
Accepting New Patients
Pomona, CA7.5 mi
Dr. Dan Lee, MD is a health care provider primarily located in Pomona, CA, with other offices in Anaheim, CA and Pomona, CA(and 2 other locations). He has 24 years of experience. View Profile

Dr. Tan Khac Nguyen, MD

Dermatology
35 years exp
Accepting New Patients
Upland, CA3.4 mi
"From the moment I walked into Dr. Nguyen’s office, I was confident that I was where I needed to be. Greeted by friendly, knowledgeable staff, immediately put me at ease." View Profile

Dr. Akhenaton Allotei Pappoe, MD

Nephrology
22 years exp
Accepting New Patients
Pomona, CA7.0 mi
Dr. Akhenaton Allotei Pappoe, MD is a health care provider primarily located in Pomona, CA, with other offices in Pomona, CA and Pomona, CA. He has 22 years of experience. View Profile

Dr. Michael Andrew Silao, MD

Internal Medicine
31 years exp
Accepting New Patients
Chino Hills, CA7.7 mi
"Wish more doctors were like him . He takes care of all his patients." View Profile

Dr. Kenoye Ruben Uku, MD

Internal Medicine
39 years exp
Accepting New Patients
RANCHO CUCAMONGA, CA6.2 mi
Dr. Kenoye Ruben Uku, MD is a health care provider primarily located in RANCHO CUCAMONGA, CA, with another office in Los Angeles, CA. He has 39 years of experience. View Profile

Dr. Habib Moussa Bashoura, MD

Family Medicine
52 years exp
Accepting New Patients
La Verne, CA9.8 mi
"Dr. Bashoura is an excellent physician. He is caring and will take his time to make sure you receive the best care." View Profile

Dr. Gerald Stanley Friedman, MD

Nephrology
60 years exp
Accepting New Patients
Upland, CA3.3 mi
Dr. Gerald Stanley Friedman, MD is a health care provider primarily located in Upland, CA, with other offices in San Bernardino, CA and Colton, CA(and 3 other locations). View Profile

Dr. Stephen Renee Greene, MD

Internal Medicine
40 years exp
Accepting New Patients
Pomona, CA7.0 mi
Dr. Stephen Renee Greene, MD is a health care provider primarily located in Pomona, CA, with other offices in El Segundo, CA and Palmdale, CA(and 3 other locations). View Profile

Dr. Mahmood Ahmed Khan, MD

Internal Medicine
29 years exp
Upland, CA3.4 mi
Dr. Mahmood Ahmed Khan, MD is a health care provider primarily located in Upland, CA, with other offices in Pomona, CA and Covina, CA(and 5 other locations). View Profile

Dr. Krishi Chanduri, MD

Nephrology
19 years exp
Accepting New Patients
Upland, CA3.4 mi
Dr. Krishi Chanduri, MD is a health care provider primarily located in Upland, CA, with other offices in Pomona, CA and Upland, CA(and 5 other locations). View Profile

Dr. Susan J Yoshino, DO

Internal Medicine
24 years exp
Rancho Cucamonga, CA3.9 mi
Dr. Susan J Yoshino, DO is a health care provider primarily located in Rancho Cucamonga, CA, with other offices in Santa Ana, CA and Santa Ana, CA. She has 24 years of experience. View Profile

Dr. Issa George Alesh, MD

Cardiovascular Disease
26 years exp
Accepting New Patients
Rancho Cucamonga, CA5.2 mi
Dr. Issa George Alesh, MD is a health care provider primarily located in Rancho Cucamonga, CA, with other offices in Riverside, CA and San Bernardino, CA(and 3 other locations). View Profile

Dr. Alan Gary Fong, MD

Ophthalmology
15 years exp
Accepting New Patients
CHINO, CA3.5 mi
Dr. Alan Gary Fong, MD is a health care provider primarily located in CHINO, CA, with other offices in City of Industry, CA and CERRITOS, CA(and 3 other locations). View Profile

Dr. Uzma Afzal Waraich, MD

Internal Medicine
24 years exp
Accepting New Patients
Pomona, CA7.0 mi
Dr. Uzma Afzal Waraich, MD is a health care provider primarily located in Pomona, CA, with another office in Pomona, CA. She has 24 years of experience. View Profile

Dr. Shoaib Uz-Zaman Naqvi, MD

Internal Medicine
54 years exp
Rancho Cucamonga, CA3.7 mi
Dr. Shoaib Uz-Zaman Naqvi, MD is a health care provider primarily located in Rancho Cucamonga, CA. He has 54 years of experience. View Profile

Dr. Eric Ming Wei Chen, MD

Family Medicine
52 years exp
Accepting New Patients
Fontana, CA7.4 mi
"My daughter needed to be seen today but not for anything contagious and I didn’t want to have to bring her to ER or UC to be exposed to all the illnesses going around." View Profile

Dr. Jonathan Doosung Cho, MD

Internal Medicine
24 years exp
Rancho Cucamonga, CA3.8 mi
Dr. Jonathan Doosung Cho, MD is a health care provider primarily located in Rancho Cucamonga, CA, with another office in DIAMOND BAR, CA. He has 24 years of experience. View Profile

Dr. Gerald Donald Goldman, MD

Gastroenterology
Pomona, CA7.3 mi
Dr. Gerald Donald Goldman, MD is a health care provider primarily located in Pomona, CA. Their specialties include Internal Medicine, Gastroenterology. View Profile

Dr. Seth A Politano, DO

Internal Medicine
21 years exp
Accepting New Patients
Pomona, CA6.9 mi
Dr. Seth A Politano, DO is a health care provider primarily located in Pomona, CA, with other offices in Los Angeles, CA and Los Angeles, CA(and 3 other locations). View Profile

Dr. Sabry Fahmy Ghaly, MD

Internal Medicine
53 years exp
Rancho Cucamonga, CA6.3 mi
Dr. Sabry Fahmy Ghaly, MD is a health care provider primarily located in Rancho Cucamonga, CA, with other offices in Rancho Cucamonga, CA and Colton, CA. View Profile

Dr. Nishita Somabhai Patel, MD

Infectious Disease
27 years exp
Accepting New Patients
Chino, CA3.9 mi
Dr. Nishita Somabhai Patel, MD is a health care provider primarily located in Chino, CA, with other offices in Pomona, CA and Chino, CA. She has 27 years of experience. View Profile

Dr. Abdalhamid Al Harash, MD

Rheumatology
16 years exp
Chino, CA3.9 mi
"VERY THOROUGH AND KIND DOCTOR.. MY WIFE IS VERY ILL WITH RHEUMATOID ARTHRITIS.. HE PRESENTED HIMSELF AS A PROFESSIONAL CARING PHYSICIAN... VERY KNOWLEDGEABLE IN HIS PROFESSION.." View Profile

Dr. Paul Marc Umof, MD

Preventative Medicine
53 years exp
Chino, CA3.9 mi
Dr. Paul Marc Umof, MD is a health care provider primarily located in Chino, CA, with another office in CHINO, CA. He has 53 years of experience. View Profile

Dr. Howard Hung-Hao Chen, DO

Internal Medicine
24 years exp
Chino, CA3.9 mi
Dr. Howard Hung-Hao Chen, DO is a health care provider primarily located in Chino, CA. He has 24 years of experience. His specialties include Internal Medicine. View Profile

Dr. Karina Pambukhchian, MD

Critical Care Medicine
33 years exp
Upland, CA3.4 mi
Dr. Karina Pambukhchian, MD is a health care provider primarily located in Upland, CA, with another office in Upland, CA. She has 33 years of experience. View Profile

Dr. Kirit C Shah, MD

Internal Medicine
49 years exp
Accepting New Patients
Pomona, CA7.5 mi
Dr. Kirit C Shah, MD is a health care provider primarily located in Pomona, CA, with other offices in Duarte, CA and Arcadia, CA(and 3 other locations). View Profile

Dr. Jennet C Lee, MD

Nephrology
26 years exp
Accepting New Patients
Rancho Cucamonga, CA4.2 mi
"always a great doctor with me, bed side manners are so nice to have" View Profile

Dr. Kenneth Spiers Brown, MD

Anesthesiology
Claremont, CA6.5 mi
"I have had Dr. Brown as my physician for over 15 years and my mother also went to him. He is a excellent Dr. and his staff was wonderful." View Profile

Dr. Sad Khalil Tuqan, MD

Cardiovascular Disease
58 years exp
Accepting New Patients
Norco, CA9.4 mi
Dr. Sad Khalil Tuqan, MD is a health care provider primarily located in Norco, CA, with other offices in Corona, CA and Santa Ana, CA(and 4 other locations). View Profile

Dr. Phuc Tuan Huynh, DO

Family Medicine
28 years exp
Pomona, CA7.3 mi
Dr. Phuc Tuan Huynh, DO is a health care provider primarily located in Pomona, CA, with other offices in San Bernardino, CA and Pomona, CA. He has 28 years of experience. View Profile

Dr. Samuel Saeed Feizi, MD

Internal Medicine
33 years exp
Upland, CA3.4 mi
Dr. Samuel Saeed Feizi, MD is a health care provider primarily located in Upland, CA, with other offices in Northridge, CA and Northridge, CA. He has 33 years of experience. View Profile

Dr. Mara Renee Archambault, MD

Internal Medicine
21 years exp
Accepting New Patients
Eastvale, CA8.6 mi
"She is the best doctor I’ve ever had, she is truly caring and listens intently when you speak to her. I love her and refuse to see anyone else!" View Profile

Dr. Anthony Mcdonald U Kingsley, MD

Internal Medicine
34 years exp
Accepting New Patients
Pomona, CA7.2 mi
Dr. Anthony Mcdonald U Kingsley, MD is a health care provider primarily located in Pomona, CA, with other offices in Cerritos, CA and El Monte, CA(and 2 other locations). View Profile

Dr. Daniel Tung Chang, MD

Diagnostic Radiology
23 years exp
UPLAND, CA3.8 mi
Dr. Daniel Tung Chang, MD is a health care provider primarily located in UPLAND, CA, with other offices in Downey, CA and UPLAND, CA. He has 23 years of experience. View Profile

Dr. Quang Dinh Vo, MD

Pediatrics
25 years exp
Pomona, CA7.3 mi
Dr. Quang Dinh Vo, MD is a health care provider primarily located in Pomona, CA, with another office in Long Beach, CA. He has 25 years of experience. View Profile

Dr. Ali Ghassan Darwish, MD

Internal Medicine
8 years exp
Pomona, CA7.3 mi
"I was very impressed with Dr. Ali Ghassan Darwish and his care for me. He explained everything clearly and patiently and answered all my questions." View Profile

Dr. Jeffrey Gerald Karst, MD

Diagnostic Radiology
23 years exp
Upland, CA3.4 mi
Dr. Jeffrey Gerald Karst, MD is a health care provider primarily located in Upland, CA, with other offices in Loma Linda, CA and Loma Linda, CA(and 2 other locations). View Profile

Dr. Jarnail Singh Gugga, MD

Internal Medicine
60 years exp
Upland, CA3.4 mi
Dr. Jarnail Singh Gugga, MD is a health care provider primarily located in Upland, CA, with other offices in Pomona, CA and Montclair, CA(and 2 other locations). View Profile

Dr. Amarilda Amy Christensen, MD

Internal Medicine
19 years exp
Rancho Cucamonga, CA4.9 mi
"Very personable doctor. Kinda reminds me of docs from 40+ years ago when they actually spent time with you and discussed your issues." View Profile

What is an Internist and How Can They Help You?

An internist specializes in adult medicine, providing comprehensive care for complex medical conditions. These physicians excel at diagnosing challenging cases and managing patients with multiple organ system involvement.

Internists complete medical school and a three-year internal medicine residency. Many pursue subspecialty fellowship training in fields such as cardiology, gastroenterology, or infectious disease, though general internists maintain broad adult medical expertise.

An Internist's clinical practice encompasses:

  • Concentrates on adult patient populations and multi-system medical management
  • Conducts medical history reviews, physical assessments, diagnostic test interpretation
  • Manages metabolic disorders, cardiovascular disease, pulmonary conditions, infectious processes, and immune-mediated diseases
  • Employs pharmaceutical management, preventive medicine, health counseling, and specialist coordination
  • Alternative titles: adult medicine specialist, general internist, MD, DO

Frequently Asked Questions

What's the best way to search for an Internist in Ontario who accepts my health insurance?
Navigate to the insurance filter located at the top of the search page and select your health plan. This will display only Internists in Ontario who are in-network with your carrier. For additional confirmation, visit each doctor's profile or reach out to their office by phone.
Where can I find Internists in Ontario who offer virtual appointments?
Select the "Virtual Visit" filter at the top of the search page to see Internists providing telehealth services in Ontario. Check each doctor's profile for video visit options and online scheduling availability. You may also call their office to set up a remote consultation.
What's the easiest way to locate highly-rated Internists in Ontario?
Use the "Ratings" filter at the top of the search page to filter results by the average star rating. Browse individual profiles to see patient reviews and ratings in detail. When comparing Internists, look at both the average star rating and how many patients have submitted reviews.
Is it possible to schedule a same-day visit with an Internist in Ontario?
Visit individual doctor profiles to see their current scheduling availability in Ontario. If you don't see same-day openings listed online, try calling their office—walk-in times may be available that don't appear on the website.
Which Internists in Ontario have the shortest wait times?
Review the Ratings & Reviews card on each provider's profile to see their average wait time in Ontario. This helps you find an Internist that doesn’t make their patients wait too long.
Can I schedule appointments with Internists in Ontario without calling?
Search for Internists who have "Book Online" or "Request Now" options on their profiles. Click these buttons to access online appointment scheduling. If a provider doesn't offer web-based booking, their phone number will be available for traditional scheduling.
How do I locate an Internist in Ontario with evening or weekend hours?
Check the Locations card on each profile to view office hours for Internists in Ontario. This helps you find providers with non-traditional availability. For the most accurate information about extended availability, call the office directly.
How do I leave feedback about my appointment with an Internist in Ontario?
Go to your doctor's profile page and click the "Leave a Review" button or link. You can share your rating and write about your experience. Patient reviews like yours help others in the community choose the right Internist.
How can I locate an Internist in Ontario who is fluent in my preferred language?
Review the language information displayed on individual profiles for Internists. If this information isn't available online, contact the office directly to ask about the doctor's language capabilities or whether interpreters are available.
How do I search for an Internist in Ontario who works at a particular hospital or medical center?
Check the "Hospital Affiliation" and "Locations" sections on each provider's profile to see where Internists practice. You can also enter a specific hospital or medical group name into the search tool to find Internists who work there.

Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.