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Dr. J Mark Barnett, MD

Medical Oncology* Age 53
Dr. J Mark Barnett, MD
4.9 (163 Ratings)

Offers telehealth

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Dr. J Mark Barnett, MD is a Medical Oncologist in Longmont, CO.
Dr. J Mark Barnett, MD
4.9 (163 Ratings)
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Dr. J Mark Barnett, MD

Medical Oncology* Age 53
Longmont, CO
Accepting new patients
24 years of experience

Offers telehealth

Dr. J Mark Barnett, MD is a Medical Oncologist in Longmont, CO.

About

Dr. Barnett graduated from Southern Illinois University School of Medicine in 2000 and completed a residency at Brown University / Rhode Islan.Dr. J Mark Barnett, MD is a Medical Oncologist in Longmont, CO and has 24 years experience. Dr. Barnett currently practices at Rocky Mountain Cancer Centers - Longmont and are affiliated with AdventHealth Avista, Intermountain Health Good Samaritan Hospital, Foothills Hospital, CommonSpirit Longmont United Hospital, CommonSpirit St. Anthony Hospital, CommonSpirit St. Anthony North Hospital, HCA HealthONE Mountain Ridge, Lutheran Medical Center and UCHealth Longs Peak Hospital. At present, Dr. Barnett received an average rating of 4.9/5 from patients and has been reviewed 163 times. Dr. Barnett's office accepts new patients and telehealth appointments. Dr. Barnett is board certified in Hematology and accepts multiple insurance plans.

Offers Telehealth

This provider offers telehealth appointments. Call the office to schedule.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

Experience Check

Enter a condition or procedure
Venous Embolism and Thrombosis
Esophageal Cancer
Upper Digestive Tract Cancer
Venous Embolism and Thrombosis
Esophageal Cancer
Upper Digestive Tract Cancer
Acquired Red Cell Aplasia
Anemia
  • View other providers who treat Anemia
Bladder Cancer
Breast Cancer
Breast Lump
Coagulation Disorders
Colorectal Cancer
Deep Vein Thrombosis (DVT)
Diffuse Large B-Cell Lymphoma
Hemochromatosis
Immune Thrombocytopenia
Kidney Cancer
Liver Cancer
Metastatic Respiratory System Cancer
Myeloma
  • View other providers who treat Myeloma
Myeloproliferative Disorders
Neuroendocrine Tumors
Neutropenia
Pancreatic Cancer
Pancytopenia
Pernicious Anemia
Primary Hypercoagulable State
Prostate Cancer
Retroperitoneum Cancer
Soft Tissue Sarcoma
Soft Tissue Sarcoma of Head, Face, and Neck
Testicular Cancer
Thrombocytosis
Thyroid Cancer
Urinary Tract Cancer
Uterine Cancer
Vitamin B12 Anemia
Liver Biopsy
Acquired Hemolytic Anemia
Acute Myeloblastic Leukemia Type 3
Acute Panmyelosis with Myelofibrosis
Adrenal Gland Cancer
Amyloidosis
Anal Cancer
Antiphospholipid Syndrome (APS)
Benign Mediastinal Tumor
Benign Neoplasm of Brain
Blood Cancer
Breast Carcinoma
Cancer
  • View other providers who treat Cancer
Cancer of Cerebral Meninges
Chordoma
  • View other providers who treat Chordoma
Chronic Myelomonocytic Leukemia
Colon Cancer
Cutaneous T-Cell Lymphoma
Diffuse Follicle Center Lymphoma
Duodenal Cancer
Endocrine Gland Cancer
Esophageal Diseases
Ewing's Sarcoma
Factor II Deficiency
Factor V Deficiency
Factor VII Deficiency
Factor X Deficiency
Factor XII Deficiency
Factor XIII Deficiency
Follicular Lymphoma Grade 1
Follicular Lymphoma Grade 2
Gastroenterologic Cancer (Colon, Stomach, Esophageal, Liver)
Gastrointestinal Cancer
Gastrointestinal Diseases
Genitourinary Cancers
Gum Cancer
Hematologic Problems
Hypogammaglobulinemia
Hypothalamus Cancer
Illeum Cancer
Jejunum Cancer
Leukemia
  • View other providers who treat Leukemia
Leukocytopenia
Leukocytosis
Lymphocytic-Rich Hodgkins Lymphoma
Lymphocytopenia
Lymphocytosis
Lymphoma
  • View other providers who treat Lymphoma
Macroglobulinemia (incl. Waldenstrom's )
Male Breast Carcinoma
Malignancy of Penile Body
Malignant Mediastinal Tumor
Malignant Neoplasm of Gastrointestinal Tract
Malignant Pituitary Gland Tumor
Malignant Pleura Secondary
Mast Cell Diseases
Meningiomas
Multiple Sclerosis (MS)
Myelodysplastic Syndromes
Neoplasm of Gastrointestinal Tract
Nerve Sheath Tumors
Nodular Lymphocyte-Predominant Hodgkin Lymphoma
Nodular Sclerosis Hodgkins Lymphoma
Osteosarcoma of the Spine
Penile Cancer
Penile Carcinoma
Pineal Region Tumors
Pituitary Gland Cancer
Pituitary Tumor
Pleura Cancer
Pleural Cancer
Polycythemia Rubra Vera
Refractory Anemia without Sideroblasts
Stomach Cancer
Thalassemia
Thymomas
  • View other providers who treat Thymomas
Urethra Cancer
Vulvovaginal Rhabdomyosarcoma
Biopsy of Breast
Cancer Treatment
Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
Chemotherapy
Thoracentesis

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Blue Card PPO
  • Choice Care PPO
    Humana
  • MultiPlan PPO
  • HealthyBlue Advantage
    HealthyBlue 2.0
  • WellChoice - U (Select Network)-CO
    Catastrophic Pathway (Pathway / Individual)-CO HMO
    Bronze Pathway (Pathway / Individual)-CO HMO
    CO Pathway (Select Network)-CO
    Platinum Pathway-CO EPO
    WellChoice - C-CO
    Blue Priority-CO HMO
    Bronze Pathway X (Pathway / Individual)-CO HMO
    Silver Pathway (Pathway / Individual)-CO HMO
    Colorado College-CO
    Colorado HMO
    Platinum-CO PPO
    National (BlueCard) PPO
    Gold Pathway (Pathway / Small Grp)-CO HMO
    Healthy Blue Priority 1-CO HMO
    WellChoice - C (Select Network)-CO
    Non-HMO- HSA, HRA and HIA+-CO
    Silver Pathway w/HSA-CO EPO
    Catastrophic (Individual)-CO PPO
    CU Health Plan - High Deductible/HSA Compatible-CO
    Traditional Network-CO
    Bronze Colorado PPO
    Balanced Pathway-CO HMO
    University of Colorado High Deductible PPO
    Bronze Pathway w/HSA-CO EPO
    Bronze Pathway (Pathway / Small Grp)-CO HMO
    WellChoice - H-CO
    WellChoice - U-CO
    Gold Colorado PPO
    Pathway PPO/EPO-CO
    Balanced Pathway-CO EPO
    Platinum Pathway (Pathway / Small Grp)-CO HMO
    Colorado POS
    Blue Priority-CO PPO
    Catastrophic Pathway X (Pathway / Individual)-CO HMO
    Lumenos-CO PPO
    Gold Pathway (Pathway / Individual)-CO HMO
    Colorado PPO
    University of Colorado Medicare-CO
    Gold Pathway w/HSA-CO EPO
    Silver-CO PPO
    Balanced-CO PPO
    WellChoice - H (Select Network)-CO
    Healthy Support with HSA 1-CO PPO
    Healthy Support 1-CO PPO
    National (BlueCard Basic) PPO
    Lumenos plans-CO
    Silver Pathway X (Pathway / Individual)-CO HMO
    Gold Pathway-CO EPO
    Pathway-CO HMO
    University of Colorado Extended PPO
    CU Health Plan - Extended-CO
    CSU Fort Collins-CO
    Silver Pathway (Pathway / Small Grp)-CO HMO
    Bronze Pathway-CO EPO
    Indemnity (Traditional)-CO
    Gold Pathway X (Pathway / Individual)-CO HMO
    Silver Pathway-CO EPO
    MediBlue Plus-CO HMO
    Healthy Blue Priority with HSA 1-CO
    CU Health Plan - Medicare-CO
  • Cigna
    LocalPlus
    Cigna PPO
    Cigna HMO
    Open Access Plus
  • First Health (Coventry Health Care)
    First Health (Coventry Health Care) PPO
  • Whole Health Colorado Front Range
    Aetna HMO
    Choice Plus POS II
    Aetna
  • Kaiser Permanente
  • Tricare
  • Curative PPO Plus
    Curative EPO
    Curative PPO
  • Medicare
  • Medicare
  • Medicaid
  • Rocky Mountain Health Plans
  • Basic Plan
  • Tricare
  • Anthem Blue Cross Blue Shield
    Anthem Blue Cross Blue Shield PPO
  • Medicaid

Locations

  1. 1 Rocky Mountain Cancer Centers - Longmont
    1760 E Ken Pratt Blvd Ste 302, Longmont, CO 80504

Patient Satisfaction

Likelihood to recommend Dr. Barnett
4.9
Based on 163 Reviews
5 Stars (158)
4 Stars (2)
3 Stars (1)
2 Stars (1)
1 Star (1)

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Patient Reviews
Oct 30, 2024
Love this doctor. He really cares about his patients
— Oct 30, 2024
See more reviews on Healthgrades
Photo: Dr. J Mark Barnett, MD
How would you rate your experience with Dr. J Mark Barnett, MD?
  • Likelihood of recommending Dr. Barnett to family and friends

Dr. Barnett's Office & Staff

  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)

Experience with Dr. Barnett

  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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Telehealth Options
This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Barnett?
Call now to make an appointment
(303) 684-1900

About Me

Specialties*
Medical Oncology
Hematology & Oncology
Hematology
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • Southern Illinois University School of Medicine
    2000
Medical Education

Board Certifications

Board Certifications
  • Hematology and Medical Oncology
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

Residency

Residency Hospital
  • Brown University / Rhode Islan
Residency Hospital
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Barnett communicate via email?
31 users said yes.
Yes
(31)
No
(6)
Does Dr. Barnett offer telehealth services or virtual visits?
17 users said yes.
Yes
(17)
No
(8)
Does Dr. Barnett offer an online patient portal?
47 users said yes.
Yes
(47)
No
(1)
Does Dr. Barnett have free onsite parking?
59 users said yes.
Yes
(59)
No
(0)
Does Dr. Barnett offer weekend visits?
3 users said yes.
Yes
(3)
No
(22)
Does Dr. Barnett offer evening visits?
4 users said yes.
Yes
(4)
No
(16)
Does Dr. Barnett specialize in working with children or adolescents?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Barnett specialize in working with seniors?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Barnett specialize in couples therapy?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Barnett specialize in working with LGBTQ+ community?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Barnett accept insurance?
No responses yet.
Yes
(0)
No
(0)

Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. J Mark Barnett, MD. To arrange an appointment, call the number on Dr. Barnett's profile.

Dr. J Mark Barnett, MD is affiliated with AdventHealth Avista, Intermountain Health Good Samaritan Hospital, Foothills Hospital, CommonSpirit Longmont United Hospital, CommonSpirit St. Anthony Hospital, CommonSpirit St. Anthony North Hospital, HCA HealthONE Mountain Ridge, Lutheran Medical Center and UCHealth Longs Peak Hospital.

Yes, Dr. J Mark Barnett, MD holds board certification in Hematology and Medical Oncology.

Hospital Affiliations

  • AdventHealth Avista

    100 Health Park Dr, Louisville, CO

  • Intermountain Health Good Samaritan Hospital

    200 Exempla Cir, Lafayette, CO

  • Foothills Hospital

    4747 Arapahoe Ave, Boulder, CO

  • CommonSpirit Longmont United Hospital

    1950 Mountain View Ave, Longmont, CO

  • CommonSpirit St. Anthony Hospital

    11600 W 2nd Pl, Lakewood, CO

  • CommonSpirit St. Anthony North Hospital

    14300 Orchard Pkwy, Westminster, CO

  • HCA HealthONE Mountain Ridge

    9191 Grant St, Thornton, CO

  • Lutheran Medical Center

    8300 W 38th Ave, Wheat Ridge, CO

  • UCHealth Longs Peak Hospital

    1750 E Ken Pratt Blvd, Longmont, CO