49 Years of Experience
Accepting patients
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 Medicare, UnitedHealthcare 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 Dr. Ma 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.
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
- Upper Middle Abdominal Pain
- Stomach Ache
- Belly Pain
- Stomach Pain
- Epigastric pain
- Pain below breastbone
- Upper stomach pain
ICD-10 Codes:
- R109: Unspecified abdominal pain
- R1013: Epigastric 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
Also known as:
- Pre-Procedure Lab Tests
- Pre-op blood work
- Lab tests before surgery
- Pre-treatment lab assessment
ICD-10 Codes:
- Z01812: Encounter for preprocedural laboratory examination
Also known as:
- Rectal Bleeding
- Gastrointestinal Bleeding
- Gastrointestinal (GI) Bleeding
- Anal Bleeding
- Blood in Stool
- Lower GI Bleed
ICD-10 Codes:
- K625: Hemorrhage of anus and rectum
What procedures does Dr. Ma 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.
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 Health Plan
All Other Third Party
AlphaCare
Crown Cork and Seal Company
Heritage Health
Medicare
Other Health Care Provider
State of Tennessee
State of Utah
UnitedHealthcare
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. 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. Contact Dr. Ma to book an appointment today.
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, Redlands Community Hospital, 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
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with 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.
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