49 Years of Experience
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Ma, Gastroenterologist in Riverside, CA?
Dr. James Ma, MD is a Gastroenterologist, who primarily practices in Riverside, CA with 2 additional practice locations. He has been practicing for over 49 years and is board certified. Dr. Ma graduated from Virginia Commonwealth University, School of Medicine, Richmond and completed his residency at Univ Ca Irvine Med Ctr, Gastroenterology; Vet Affairs Med Ctr, Internal Medicine. Dr. Ma is fluent in English, Spanish, and Vietnamese, and is currently seeing new patients. Dr. Ma’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Ma’s office at (909) 353-2000.
Where did Dr. Ma go to medical school and complete their residency?
Residency: Univ Ca Irvine Med Ctr, Gastroenterology; Vet Affairs Med Ctr, Internal Medicine | University Ca Irvine Med Center
Medical School: VA Commonwealth University School Of Medicine | Virginia Commonwealth University, School of Medicine, Richmond
Is Dr. Ma board certified as a Gastroenterologist?
Yes, Dr. James Ma, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Ma speak?
Dr. Ma and their clinical team can communicate with patients in the following languages:
English
Spanish
Vietnamese
What conditions does a Gastroenterologist like Dr. Ma typically treat?
As a Gastroenterologist, Dr. Ma diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Ma. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Immunization Visit
- Vaccines
- Vaccination appointment
- Shot visit
- Immunization encounter
ICD-10 Codes:
- Z23: Encounter for immunization
Also known as:
- Abdominal Pain
- Stomach Ache
- Belly Pain
- Stomach Pain
ICD-10 Codes:
- R109: Unspecified abdominal pain
Also known as:
- Acid Reflux
- GERD
- Acid Reflux (GER & GERD) in Adults
- Acid Reflux (GER & GERD) in Children
- Acid Reflux (GER & GERD) in Infants
- Gastroesophageal Reflux
- Heartburn
- Indigestion
ICD-10 Codes:
- K219: Gastro-esophageal reflux disease without esophagitis
What procedures does a Gastroenterologist like Dr. Ma typically perform?
As a Gastroenterologist, Dr. Ma performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Ma. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy with Biopsy
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
CPT Codes:
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
Also known as:
- Diagnostic Upper Endoscopy with Biopsy
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
CPT Codes:
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Does Dr. Ma accept my insurance?
Dr. Ma accepts most major insurance plans. Important: Please call our office at (909) 353-2000 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Ma accept in Riverside, CA?
Dr. Ma in Riverside, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alignment Healthcare
All Other Third Party
AlphaCare
CVS Health (formerly Aetna)
Heritage Health
Kaiser Permanente
Medicare
Other Health Care Provider
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Ma's office located?
What is Dr. Ma's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Ma's National Provider Identifier (NPI) number is 1295802007.
What common questions do patients ask about Dr. Ma?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Ma
What is Dr. James Ma's specialty?
Dr. Ma is a Gastroenterologist near Riverside, CA.
What does a Gastroenterologist do?
An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs.
Is this Dr. James Ma affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Ma is affiliated with Kaiser Permanente Riverside Medical Center, Kaiser Permanente Baldwin Park Medical Center, Kaiser Permanente Fontana Medical Center which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Gastroenterologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Gastroenterologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is James Ma accepting new patients in Riverside, CA?
Yes, Dr. James Ma is accepting new patients at this time.
Does Dr. James Ma offer online booking?
Please contact Dr. Ma's office at (909) 353-2000 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with James Ma?
Please contact Dr. Ma's office at (909) 353-2000 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. James Ma have?
Dr. James Ma is certified by the American Board of Internal Medicine.
<section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>