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Dr. John Barnett, MD

Dr. John Barnett, MD

Longmont, CO

Accepting patients

    Who is Dr. Barnett, Hematology / Oncology Specialist in Longmont, CO?

    Dr. John Barnett, MD is a Hematology / Oncology Specialist, who primarily practices in Longmont, CO with 2 additional practice locations. He is board certified. Dr. Barnett graduated from Southern Illinois Univ School of Medicine. Dr. Barnett is fluent in English, and is currently seeing new patients. Dr. Barnett’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Barnett’s office at (303) 684-1900.

    Where did Dr. Barnett go to medical school and complete their residency?

    • Medical School: Southern Illinois Univ School of Medicine

    Is Dr. Barnett board certified as a Hematology / Oncology Specialist?

    Yes, Dr. John Barnett, MD is board certified by the American Board of Internal Medicine

    What languages does Dr. Barnett speak?

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

    • English

    What conditions does a Hematology / Oncology Specialist like Dr. Barnett typically treat?

    As a Hematology / Oncology Specialist, Dr. Barnett 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. Barnett. 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:

    • Prostate Cancer
    • Prostate Cancer Treatment (PDQ®)
    • Prostatic Carcinoma
    • Prostate Gland Cancer
    • Malignant Prostate Tumor

    ICD-10 Codes:

    • C61: Malignant neoplasm of prostate

    Also known as:

    • Multiple Myeloma
    • Plasma Cell Neoplasms (Including Multiple Myeloma) Treatment (PDQ®)
    • Active multiple myeloma
    • Untreated multiple myeloma
    • Plasma cell myeloma

    ICD-10 Codes:

    • C9000: Multiple myeloma not having achieved remission

    Also known as:

    • Cancer Chemotherapy
    • Chemo treatment
    • Oncology chemotherapy
    • Cancer drug therapy

    ICD-10 Codes:

    • Z5111: Encounter for antineoplastic chemotherapy

    Also known as:

    • Colorectal Cancer
    • Rectal cancer
    • Colon cancer
    • Bowel cancer
    • Malignant neoplasm of rectum

    ICD-10 Codes:

    • C20: Malignant neoplasm of rectum

    Also known as:

    • Lung Cancer
    • Right upper lobe lung cancer
    • Bronchial cancer
    • Malignant neoplasm of lung

    ICD-10 Codes:

    • C3411: Malignant neoplasm of upper lobe, right bronchus or lung

    Also known as:

    • Pancreatic Cancer
    • Cancer of the pancreas
    • Malignant neoplasm of pancreas
    • Pancreatic adenocarcinoma

    ICD-10 Codes:

    • C250: Malignant neoplasm of head of pancreas

    What procedures does a Hematology / Oncology Specialist like Dr. Barnett typically perform?

    As a Hematology / Oncology Specialist, procedures performed by Dr. John Barnett may include:

    Please contact Dr. Barnett's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.

    Does Dr. Barnett accept my insurance?

    Dr. Barnett accepts most major insurance plans. Important: Please call our office at (303) 684-1900 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Barnett accept in Longmont, CO?

    Dr. Barnett in Longmont, CO accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Alignment Healthcare

    • Blue Cross Blue Shield of Michigan

    • Cigna Group

    • Corporate Services

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • Kaiser Permanente

    • Medicare

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Barnett's office located?

    Dr. John Barnett's Primary Practice

    2030 Mountain View Ave Ste 210

    Longmont, CO 80501

    (303) 684-1900

    Get Directions

    Dr. John Barnett's Practice 2

    1760 E Ken Pratt Blvd Ste 302

    Longmont, CO 80504

    Get Directions

    Dr. John Barnett's Practice 3

    730 14th St SW Ste 200

    Loveland, CO 80537

    Get Directions

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

    Dr. Barnett's National Provider Identifier (NPI) number is 1952341273.

    What common questions do patients ask about Dr. Barnett?

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

    What is Dr. John Barnett's specialty?

    Dr. Barnett is a Hematology / Oncology Specialist near Longmont, CO.

    What does a Hematology / Oncology Specialist do?

    An internist doctor of osteopathy specializing in the combined treatment of hematology and oncology disorders. A doctor of osteopathy who is board eligible or certified by the American Osteopathic Board of Internal Medicine was previously able to obtain a Certificate of Special Qualifications in Hematology and Oncology; however, this certificate is no longer available.

    Is this Dr. John Barnett affiliated with a ranked Castle Connolly Top Hospital?

    No, Barnett is not affiliated with a Castle Connolly Top Hospital, but is affiliated with the following hospitals: Uchealth Longs Peak Hospital, Sterling Regional Medcenter, Uchealth Medical Center Of The Rockies, Commonspirit - Longmont United Hospital, Uchealth Greeley Hospital, Banner Fort Collins Medical Center. Castle Connolly Top Hospitals 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 Hematology / Oncology Specialist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see a Hematology / Oncology Specialist. 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 John Barnett accepting new patients in Longmont, CO?

    Yes, Dr. John Barnett is accepting new patients at this time.

    Does Dr. John Barnett offer online booking?

    Please contact Dr. Barnett's office at (303) 684-1900 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with John Barnett?

    Please contact Dr. Barnett's office at (303) 684-1900 for information regarding telehealth appointment availability or for scheduling assistance.

    Which board certifications does Dr. John Barnett have?

    Dr. John Barnett 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>