The 20 Best Peritonitis Doctors Near Me in Ontario, CA

Find the Top Peritonitis Experts and Specialists

The 20 Best Peritonitis Doctors near Ontario, CA

Last Updated: 02/22/2026

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MediFind found 60 doctor with experience in Peritonitis near Ontario, CA. Of these, 56 are Experienced and 4 are Advanced.

Location
LocationClose
60 providers found
    Experienced in Peritonitis
    Radiology
    Experienced in Peritonitis
    Radiology

    San Antonio Regional Hospital

    999 San Bernardino Rd, 
    Upland, CA 
     (2.7 miles away)
    Languages Spoken:
    English

    Peter Yoo is a Radiologist in Upland, California. Dr. Yoo is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Pleurisy, Gallbladder Disease, Ascites, Pancreaticoduodenectomy, and Bone Marrow Aspiration.

    Experienced in Peritonitis
    Experienced in Peritonitis

    San Antonio Regional Hospital

    999 San Bernardino Rd, 
    Upland, CA 
     (2.7 miles away)
    Languages Spoken:
    English

    Stuart Berry is a Radiologist in Upland, California. Dr. Berry is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Ascites, Pleurisy, Pleural Effusion, Bone Marrow Aspiration, and Stent Placement.

    Experienced in Peritonitis
    Radiology
    Experienced in Peritonitis
    Radiology

    San Antonio Regional Hospital

    999 San Bernardino Rd, 
    Upland, CA 
     (2.7 miles away)
    Languages Spoken:
    English

    David Dang is a Radiologist in Upland, California. Dr. Dang is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Pleurisy, Gallbladder Disease, Pleural Effusion, and Tenosynovitis.

    Learn about our expert tiers
    Experienced in Peritonitis
    Experienced in Peritonitis

    San Antonio Regional Hospital

    999 San Bernardino Rd, 
    Upland, CA 
     (2.7 miles away)
    Languages Spoken:
    English

    Reza Pakdaman is a Radiologist in Upland, California. Dr. Pakdaman is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Pleurisy, Gallbladder Disease, Pleural Effusion, Fecal Impaction, and Osteotomy.

    Experienced in Peritonitis
    Neuroradiology | Radiology | Interventional Radiology
    Experienced in Peritonitis
    Neuroradiology | Radiology | Interventional Radiology

    Ontario Medical Center

    2295 S Vineyard Ave, 
    Fontana, CA 
     (3.8 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Gilbert Cheung is a Radiologist and a Neuroradiologist in Fontana, California. Dr. Cheung is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Multisystem Inflammatory Syndrome in Children (MIS-C), Vertigo, Pleural Effusion, and Stroke. Dr. Cheung is currently accepting new patients.

    Experienced in Peritonitis
    Radiology
    Experienced in Peritonitis
    Radiology

    Office

    8599 Haven Ave Ste 300, 
    Rancho Cucamonga, CA 
     (4.7 miles away)
    Languages Spoken:
    English

    Thomas Lin is a Radiologist in Rancho Cucamonga, California. Dr. Lin is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Gallbladder Disease, Visceromegaly, Non-Alcoholic Fatty Liver Disease, and Hepatocerebral Degeneration.

    Experienced in Peritonitis
    Radiology
    Experienced in Peritonitis
    Radiology

    Office

    8599 Haven Ave Ste 300, 
    Rancho Cucamonga, CA 
     (4.7 miles away)
    Languages Spoken:
    English

    Joel Block is a Radiologist in Rancho Cucamonga, California. Dr. Block is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Pleurisy, Pleural Effusion, Cholesterol Pneumonia, and Chronic Cough.

    Advanced in Peritonitis
    General Surgery
    Advanced in Peritonitis
    General Surgery

    Upland Surgical Associates

    510 N 13th Ave, 
    Upland, CA 
     (2.6 miles away)
    Experience:
    30+ years
    Languages Spoken:
    English

    Bryce Beseth is a General Surgeon in Upland, California. Dr. Beseth has been practicing medicine for over 30 years and is rated as an Advanced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Gangrene, Choledocholithiasis, Necrosis, Hernia Surgery, and Colostomy.

    Advanced in Peritonitis
    Internal Medicine
    Advanced in Peritonitis
    Internal Medicine

    Premiere Medical Group Of California

    901 San Bernardino Rd Ste 101, 
    Upland, CA 
     (2.9 miles away)
    Languages Spoken:
    English

    Ythanh Nguyen is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Nguyen is rated as an Advanced provider by MediFind in the treatment of Peritonitis. Her top areas of expertise are Peptic Ulcer, Sepsis, Necrosis, Endoscopy, and Colonoscopy.

    Advanced in Peritonitis
    General Surgery
    Advanced in Peritonitis
    General Surgery

    Anthony S. Oh, MD A Medical Corporation

    4950 San Bernardino St, 
    Montclair, CA 
     (2.9 miles away)
    Experience:
    30+ years
    Languages Spoken:
    English

    Anthony Oh is a General Surgeon in Montclair, California. Dr. Oh has been practicing medicine for over 30 years and is rated as an Advanced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Gallstones, Choledocholithiasis, Gallbladder Disease, Colostomy, and Gastrostomy.

    Experienced in Peritonitis
    Family Medicine
    Experienced in Peritonitis
    Family Medicine

    S. M. Hammad Rizvi, M.D., Inc.

    901 San Bernardino Rd, 
    Upland, CA 
     (2.5 miles away)
    Experience:
    25+ years
    Languages Spoken:
    English

    Syed Rizvi is a primary care provider, practicing in Family Medicine in Upland, California. Dr. Rizvi has been practicing medicine for over 25 years and is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Hypertensive Heart Disease, Multisystem Inflammatory Syndrome in Children (MIS-C), COVID-19, Gastrostomy, and Endoscopy.

    Experienced in Peritonitis
    General Surgery
    Experienced in Peritonitis
    General Surgery

    Upland Surgical Associates

    901 San Bernardino Rd, 
    Upland, CA 
     (2.5 miles away)
    Experience:
    28+ years
    Languages Spoken:
    English

    Donna Dudziak is a General Surgeon in Upland, California. Dr. Dudziak has been practicing medicine for over 28 years and is rated as an Experienced provider by MediFind in the treatment of Peritonitis. Her top areas of expertise are Hernia, Gallbladder Disease, Cholecystitis, Hernia Surgery, and Colostomy.

    Experienced in Peritonitis
    General Surgery
    Experienced in Peritonitis
    General Surgery

    Upland Surgical Associates

    811 E 11th St, 
    Upland, CA 
     (2.8 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English

    Adam Sugihara is a General Surgeon in Upland, California. Dr. Sugihara has been practicing medicine for over 17 years and is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Cellulitis, Cholecystitis, Retroperitoneal Inflammation, Hernia Surgery, and Gastrostomy.

    Experienced in Peritonitis
    Internal Medicine
    Experienced in Peritonitis
    Internal Medicine

    Inland Pulmonary Medical Group

    9525 Monte Vista Ave Unit 105, 
    Montclair, CA 
     (2.9 miles away)
    Languages Spoken:
    English

    Jose Santiago is a primary care provider, practicing in Internal Medicine in Montclair, California. Dr. Santiago is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Parkinson's Disease, Apoplexy, Sepsis, Hernia Surgery, and Kidney Transplant.

    Experienced in Peritonitis
    General Surgery | Transplant Surgery
    Experienced in Peritonitis
    General Surgery | Transplant Surgery

    Ali Abidali Do Professional Medical Corporation

    500 N Euclid Ave, 
    Upland, CA 
     (2.9 miles away)
    Languages Spoken:
    English, Arabic
    Accepting New Patients

    Ali Abidali is a General Surgeon and a Transplant Surgeon in Upland, California. Dr. Abidali is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Cholecystitis, Ogilvie Syndrome, Gastrointestinal Perforation, and Gallbladder Disease. Dr. Abidali is currently accepting new patients.

    Experienced in Peritonitis
    Family Medicine
    Experienced in Peritonitis
    Family Medicine

    Nagasamudra Ashok, M.D.

    5000 San Bernardino St, 
    Montclair, CA 
     (2.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Anika Muthiah is a primary care provider, practicing in Family Medicine in Montclair, California. Dr. Muthiah is rated as an Experienced provider by MediFind in the treatment of Peritonitis. Her top areas of expertise are Sepsis, Peptic Ulcer, Necrosis, Acute Tubular Necrosis, and Colonoscopy.

    Experienced in Peritonitis
    Internal Medicine
    Experienced in Peritonitis
    Internal Medicine

    Hadi, Ghassan, E., M.D., Inc.

    1060 E Foothill Blvd, 
    Upland, CA 
     (3.0 miles away)
    Experience:
    38+ years
    Languages Spoken:
    English
    Offers Telehealth

    Ghassan Hadi is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Hadi has been practicing medicine for over 38 years and is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Acute Kidney Failure, End-Stage Renal Disease (ESRD), Sepsis, Gastrostomy, and Endoscopy.

    Experienced in Peritonitis
    Interventional Radiology
    Experienced in Peritonitis
    Interventional Radiology

    Ontario Medical Center

    2295 S Vineyard Ave, 
    Ontario, CA 
     (3.2 miles away)
    Languages Spoken:
    English

    Sam Kim is an Interventional Radiologist in Ontario, California. Dr. Kim is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Stroke, Fractured Spine, Pleural Effusion, and Gallbladder Disease.

    Experienced in Peritonitis
    Internal Medicine
    Experienced in Peritonitis
    Internal Medicine

    Ontario Medical Center

    2295 S Vineyard Ave, 
    Ontario, CA 
     (3.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Waylee Tan is a primary care provider, practicing in Internal Medicine in Ontario, California. Dr. Tan is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Gastrointestinal Bleeding, Sepsis, Hospital-Acquired Pneumonia, Atypical Pneumonia, and Endoscopy. Dr. Tan is currently accepting new patients.

    Experienced in Peritonitis
    General Surgery
    Experienced in Peritonitis
    General Surgery

    Ontario Medical Center

    2295 S Vineyard Ave, 
    Ontario, CA 
     (3.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Raymond Chou is a General Surgeon in Ontario, California. Dr. Chou is rated as an Experienced provider by MediFind in the treatment of Peritonitis. His top areas of expertise are Acrospiroma, Retroperitoneal Inflammation, Gallbladder Disease, Choledocholithiasis, and Gallbladder Removal. Dr. Chou is currently accepting new patients.

    Showing 1-20 of 60

    Last Updated: 02/22/2026

    What is the definition of Peritonitis?

    Peritonitis is an inflammation (irritation) of the peritoneum. This is the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs.

    When should I see a Peritonitis doctor near Ontario, CA?

    There are various reasons why you may want to see a specialist, such as: 

    • Your primary care provider recommends it. 
    • Your condition requires expert knowledge and specialized care. 
    • Your symptoms persist or worsen despite treatment. 
    • You need specialized testing or procedures. 
    • You want a second opinion.  

    What should I consider when choosing a Peritonitis doctor near Ontario, CA?

    It’s important to see a provider with expertise in your specific condition. Each provider profile in MediFind’s doctor database includes information on which conditions they treat, years of experience, research contributions, languages spoken, insurance plans accepted, and more.  

    How does MediFind rank Peritonitis doctors near Ontario, CA?

    MediFind’s rankings are based on a variety of data sources, such as the number of articles a doctor has published in medical journals, participation in clinical trials and industry conferences, as well as the number of patients that provider sees for a given condition. Note that MediFind’s provider database is not based on user reviews, and providers do not pay to be included in the database. 

    What types of insurance are accepted by Peritonitis doctors near Ontario, CA?

    Most profiles in MediFind’s doctor database include a list of insurance plans accepted by that provider. However, it’s a good idea to contact the provider’s office to make sure they still accept your insurance, then doublecheck by contacting your insurance plan to confirm they’re in network. 

    How can I book an appointment online with a Peritonitis doctor near Ontario, CA?

    MediFind offers direct scheduling for certain providers using the “Request Appointment” button on that provider’s profile. If the schedule option is not available for a provider, tap the red “Show Phone Number” button on their profile to get their contact information. If you prefer to find providers who offer online scheduling, select “Schedules online” under the “Availability” category of the filter feature on the left side of the Peritonitis doctor search results page. 

    Why is it important to get a second opinion from a different Peritonitis doctor?

    Second opinions are an opportunity to confirm a diagnosis and its root cause, learn about alternative treatment options, or simply gain peace of mind. Many people, especially those with serious diagnoses, get second opinions so they can understand all their options and make informed decisions, so don’t hesitate to get one if you have any doubts or need more information or clarification regarding your care. Note that some insurance plans require second opinions, while others don’t cover second opinions, so be sure to confirm with your insurance provider first.   

    How can I prepare for my appointment with a Peritonitis doctor near Ontario, CA?

    Prepare for your appointment by gathering the following items: 

    • Copies of medical records (dating back at least one year) 
    • Your medical history, including illnesses, medical conditions, surgeries, and other doctors you see 
    • Family history of disease 
    • List of current prescription drugs, over-the-counter medicines, vitamins, and herbal remedies or supplements including names and doses 
    • Allergies to medications, food, latex, insects, etc.  
    • List of questions and concerns 
    • Your insurance card 

    You might also contact the provider’s office to see if they offer transportation or childcare services or if you’re allowed to bring a loved one for support or to take notes during your visit. 

    What questions should I ask my Peritonitis doctor?

    Here are some sample questions: 

    • Can you explain in simple terms what this condition is and how it’s treated? 
    • What symptoms or side effects should I watch for? 
    • What tests will be involved, and when can I expect results? 
    • Are there other specialists I need to see? 
    • What’s the best way to reach you if I have follow-up questions? 

    How can I learn about the latest clinical trials and research advances my Peritonitis doctor may know about?

    MediFind’s Clinical Trials tool asks you a series of questions to help you narrow down your search by health condition, age, gender, location, how far you’re willing to travel, and more. Each question you answer filters down the number of trials until you find the ones that are most relevant to you. 

    MediFind’s Latest Advances tool features summaries of recent articles published in medical journals. We use cutting-edge technology to scour medical publication databases for the latest research advancements on any given condition, then we simplify this information in a way that’s useful and easy to understand. 

    Can I filter my search to show male or female Peritonitis doctors near Ontario, CA?

    Look for the filter feature on the left side of the Peritonitis doctor search results page. Select “Female” or “Male” under the “Gender” category to search for female or male providers exclusively. If the “Any” option is selected, it will pull results for both male and female providers. 

    Can I filter my search to find a Peritonitis doctor that offers video calls?

    Look for the filter feature on the left-side of the Peritonitis doctor search results page. Select “Offers telehealth visits” under the Availability category to search for providers who offer virtual appointments (video calls). 

    Reviewed on: 11/11/24  

    By: MediFind Medical Staff 

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