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Dr. Evan Mosier, MD

Duarte, CA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Mosier, Gastroenterologist in Duarte, CA?

    Dr. Evan Mosier, MD is a Gastroenterologist, who primarily practices in Duarte, CA with 2 additional practice locations. Dr. Mosier is fluent in English, and is currently seeing new patients. Dr. Mosier’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Mosier’s office at (909) 427-5000.

    What languages does Dr. Mosier speak?

    Dr. Mosier and their clinical team can communicate with patients in the following languages:

    • English

    What conditions does a Gastroenterologist like Dr. Mosier typically treat?

    As a Gastroenterologist, Dr. Mosier 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. Mosier. 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:

    • Difficulty Swallowing
    • Swallowing Disorder
    • Dysphagia
    • Trouble swallowing
    • Painful swallowing

    ICD-10 Codes:

    • R1310: Dysphagia, unspecified

    Also known as:

    • Upper Middle Abdominal Pain
    • Abdominal Pain
    • Epigastric pain
    • Pain below breastbone
    • Upper stomach pain

    ICD-10 Codes:

    • R1013: Epigastric pain

    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:

    • Hemorrhoids
    • Piles
    • Anal veins
    • Swollen rectal veins

    ICD-10 Codes:

    • K648: Other hemorrhoids

    What procedures does a Gastroenterologist like Dr. Mosier typically perform?

    As a Gastroenterologist, Dr. Mosier 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. Mosier. 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:

    • Colonoscopy with Biopsy
    • Colonoscopy with Polyp Removal
    • Diagnostic Colonoscopy with Biopsy
    • Colonoscopy
    • Colorectal Cancer Screening Tests
    • Flexible Colonoscopy
    • Colon Biopsy
    • Large Intestine Scope
    • Colorectal Cancer Screening
    • Flexible Colonoscopy with Polypectomy
    • Colon Polyp Removal
    • Colorectal Lesion Excision
    • Colon Exam with Biopsy
    • Lower Endoscopy
    • Colon Cancer Screening

    CPT Codes:

    • 45380: Colonoscopy, flexible; with biopsy, single or multiple
    • 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
    • 45378: Colonoscopy, flexible; 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

    Also known as:

    • Diagnostic Upper Endoscopy with Biopsy
    • Esophagus Widening Procedure (Endoscopic)
    • EGD with Esophageal Balloon Dilation
    • EGD with Biopsy
    • Esophagogastroduodenoscopy
    • Upper GI Endoscopy
    • Stomach Scope with Sample
    • Esophageal Dilation
    • EGD with Dilation
    • Upper Endoscopy with Widening
    • Upper Endoscopy with Esophageal Dilation
    • Flexible Esophagoscopy with Balloon
    • EGD with Balloon Widening

    CPT Codes:

    • 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
    • 43248: Esophagogastroduodenoscopy, flexible, transoral; with insertion of guide wire followed by passage of dilator(s) through esophagus over guide wire
    • 43249: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic balloon dilation of esophagus (less than 30 mm diameter)

    Does Dr. Mosier accept my insurance?

    Dr. Mosier accepts most major insurance plans. Important: Please call our office at (909) 427-5000 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Mosier accept in Duarte, CA?

    Dr. Mosier in Duarte, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • All Other Third Party

    • Centene Corporation

    • City of Los Angeles

    • Elevance Health Inc. (formerly Anthem)

    • H & R Block

    • Medicare

    • Not Specified

    • State of California

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Mosier's office located?

    Dr. Evan Mosier's Primary Practice

    1500 Duarte Rd

    Duarte, CA 91010

    (909) 427-5000

    Get Directions

    Kaiser Permanente Southern California

    9961 Sierra Ave

    Fontana, CA 92335

    Get Directions

    Dr. Evan Mosier's Practice 3

    2295 S Vineyard Ave

    Ontario, CA 91761

    Get Directions

    What is Dr. Mosier's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. Mosier's National Provider Identifier (NPI) number is 1598152365.

    What common questions do patients ask about Dr. Mosier?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Mosier

    What is Dr. Evan Mosier's specialty?

    Dr. Mosier is a Gastroenterologist near Duarte, 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. Evan Mosier affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Mosier is affiliated with City Of Hope - Duarte Cancer Center, Eisenhower Health Main Campus, Sharp Chula Vista 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 Evan Mosier accepting new patients in Duarte, CA?

    Yes, Dr. Evan Mosier is accepting new patients at this time.

    Does Dr. Evan Mosier offer online booking?

    Please contact Dr. Mosier's office at (909) 427-5000 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Evan Mosier?

    Please contact Dr. Mosier's office at (909) 427-5000 for information regarding telehealth appointment availability or for scheduling assistance.

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