Dr. Gregory Seymour, MD

Dr. Gregory Seymour, MD

Medical Oncology •  Male • Age 50

  
Accepting new patients

Dr. Gregory Seymour, MD is a Medical Oncology Specialist in Kingwood, TX. Dr. Seymour has more experience with Blood Disorders, Lymphatic Disorders, and Blood Cancers than other specialists in his area. He is affiliated with medical facilities such as HCA Houston Healthcare Northwest and HCA Houston Healthcare Kingwood. He is accepting new patients. Be sure to call ahead with Dr. Seymour to book an appointment.


Locations

Millennium Oncology

New Patient?
(281) 358-2850
Millennium Physicians Oncology & Rheumatology - Kingwood22710 Professional Dr Ste 100 Kingwood, TX 77339
1
  • Call
  • Fax
  • Hours
    • Mon: 8:30am - 5:00pm
    • Tue: 8:30am - 5:00pm
    • Wed: 8:30am - 5:00pm
    • Thu: 8:30am - 5:00pm
    • Fri: 8:30am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions
Millennium Physicians Oncology & Rheumatology - The Woodlands9319 Pinecroft Dr The Woodlands, TX 77380
2
  • Call
  • Fax
  • Hours
    • Mon: 8:30am - 5:00pm
    • Tue: 8:30am - 5:00pm
    • Wed: 8:30am - 5:00pm
    • Thu: 8:30am - 5:00pm
    • Fri: 8:30am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions
Millennium Physicians Oncology - North Houston17323 Red Oak Dr Houston, TX 77090
3
  • Call
  • Fax
  • Hours
    • Mon: 8:30am - 5:00pm
    • Tue: 8:30am - 5:00pm
    • Wed: 8:30am - 5:00pm
    • Thu: 8:30am - 5:00pm
    • Fri: 8:30am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

More Oncology Specialists at Millennium Oncology

Dr. Seymour's Reviews

Likelihood to recommend Dr. Seymour

4.6

Based on 47 ratings

5 Stars
89.36170212765957%
(42)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
10.638297872340425%
(5)
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Doctor Seymour is everything you would want in a battle with Cancer. After bouncing around between a half dozen hospitals that were centers for academic excellence in Cancer on the east coast and waiting for endless appointments -- I finally made it to Dr. Seymour who acted quickly. He was straight-forward, realistic, and compassionate and clearly leads in his field. He was always reachable and responsive and the night before a procedure he called me to change plans, as a new research study had come out that day with a better option. I've met fewer doctors more passionate about what they do and hands-down would send anyone to him.
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Jeff B – May 17, 2020
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I was diagnosed with non Hodgkin’s lymphoma July 2017. I went to see Dr. Seymour right after I was diagnosed and he got on the ball testing my bone marrow, scheduling my port and then scheduling my chemo right after my port was inserted. He is a very caring and professional doctor that will take very good care of you. I still see him every 5 months for follow up visits after pet scan and blood work. I wouldn’t go to another doctor and I felt very fortunate that he could see me so quickly. I would highly recommend him if you need to see an oncologist.
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Ellen in Magnolia, TX – Sep 05, 2019
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I have been a patient of Dr. Seymour for the last 5 years since I was diagnosed with a blood clot. He is very thorough and listens carefully. He explains everything so you won’t leave with more questions than answers. When I developed a second clot in February due to knee replacement surgery, the ER doctor consulted with him for my immediate care. I feel blessed to have him in my corner- he is compassionate in his care of his patients & demonstrates a genuine interest in you as a patient & as a person. There is no waiting when you have an appointment-I literally am called in seconds after sitting down. Hi staff is amazing - Pam, Sarah, and Chloe. Also, when I needed an iron infusion, the crew in the infusion room were amazing. His nurse, Chasity, is so welcoming & friendly. he is an amazing doctor!!!
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Kathy Burns in Spring, TX – Aug 08, 2019
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Dr. Seymour has taken care and control of my affliction for the last 5 years. He is proactive, honest, straightforward and compassionate. As well as at the forefront of new treatments and technologies. His staff is amazing also, Pam at the front and Lauren and crew in the infusion center or all at the top of their craft
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Clayton G in Montgomery, TX – May 23, 2019
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Dr. Seymour is professional, knowledgeable, and communicates thoroughly and kindly and helps you understand everything. He is a phenomenal doctor.
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Conroe, TX – Apr 28, 2019
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He saw my mother and diagnosed her immediately with multiple myeloma whiteout any further testing placed her on appropriate medication and a year later she is in remission. It didn’t hurt he was trained at md anderson. We have his cell phone for emergencies. Who has heard of that ?
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Susan in Woodlands , TX – Mar 07, 2019
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The worst doctor I have ever had the experience of meeting. When we tried to ask a question about my husband's cancer care, he asked us if we were going to talk over him. He is very egotistical, and very uncaring. Would not shake my husband's hand when we left because he was afraid my husband would hurt it. Really? This is Texas, ya'll. He's not a surgeon. The ONLY friendly person in the office was the lady who did the blood pressure, weight, etc. The office staff were playing on cell phones
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Debbie in The Woodlands, TX – Feb 07, 2019
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He treated my mother. I observed first hand how wonderful he is. Thank you Dr Seymour!
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Jan Rasco in TX – Nov 14, 2018
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Amazing physician. He has compassion and definitely cares about his patients.
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Dennis in Spring, TX – Jun 25, 2018
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Fantastic doctor with an amazing bedside manner!We love him!
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Stacy Smith in Magnolia – Jan 24, 2018
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I appreciate Dr. Seymour's knowledge, care, and dedication to his patients. I have been in his care for the last 4 years.
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D Gonzales in Houston, TX – Jan 16, 2018
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If you don't have good insurance, don't bother going to him, his bedside manner sucked, and he don't tell you the truth, in my opinion he's in it for the money. My brother suffered because his untruth. Shook his hand said good luck. Nice!
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New Caney – Jan 14, 2018
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I owe my life to this guy Told by md anderson they couldn't help and saw him last ditch. That was two years ago. Wow. Anyway see hi if you need help!,,
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Houston, TX – Jul 22, 2017
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HE is THE best!!!!
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Sandra in magnolia, tx – Apr 23, 2017
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He is the worst Doctor that I have ever encountered. I was shocked by his rudeness and his refusal to even go over my test results with me. I am actually checking into this. There must be some legalities involved when I Doctor, who has already been paid, refuses to explain your test results.
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Denise in Magnolia, TX – May 23, 2016
This poor woman saw me for only iron deficiency...Read More
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exceptional, very nice. thorough, easy to talk with. handled my father and me as patients very well.
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john in Spring, TX – May 12, 2016
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Dr Seymour is very personable and professional, yet easily accessible. Responses to text anytime.
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msflournoy in Spring, TX – Feb 05, 2016
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Insurance Check

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Dr. Seymour accepts

Accepted insurance can change. Please double-check when making an appointment.

(281) 358-2850

Dr. Seymour accepts the following insurance:

Aetna
Aetna HMO
Choice Plus POS II
Amerigroup (Wellpoint)
Anthem
National (BlueCard) PPO
Assurant Health
Blue Cross Blue Shield
Blue Card PPO
Blue Cross Blue Shield of Texas
Blue Advantage HMO
Blue Choice
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
Cigna
Cigna HMO
Cigna PPO
LocalPlus
Open Access Plus
Commercial Insurance Company
Community Health Choice
CoreSource
Coventry Health Care
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Golden Rule
Government Employees Health Association (GEHA)
GEHA
HAP Insurance
Health Alliance
HealthSmart
Humana
Choice Care PPO
Preferred PPO
Humana Health Plan of Texas
Houston Area HMO-Standard
Medicaid
Medicare
Molina Healthcare
Molina
MultiPlan
MultiPlan PPO
PHCS Network PPO
UnitedHealthCare
Choice Plus POS
Navigate HMO
Navigate POS
Options PPO
United Healthcare

Background Check

No malpractice claims found for Texas
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Practice Areas

Blood Disorders

Blood disorders specialists diagnose and treat conditions that affect the blood's ability to function, including hemophilia, anemia, and sickle cell disease.Compare with other Blood Disorders specialists.

Typically treats 76% more than their peers

Based on claims data for 15 conditions and procedures

TreatmentsTreatment Frequency
Blood Disorders
very high
very high

Treatment Frequency

Dr. Seymour treats Blood Disorders more than 100% of their peers

Dr. Seymour treats this condition more than 100% of their peers

Anemia
very high
very high

Treatment Frequency

Dr. Seymour treats Anemia more than 99% of their peers

Dr. Seymour treats this condition more than 99% of their peers

Bleeding Disorders
very high
very high

Treatment Frequency

Dr. Seymour treats Bleeding Disorders more than 99% of their peers

Dr. Seymour treats this condition more than 99% of their peers

Lymphatic Disorders

Lymphatic disorders specialists diagnose and treat conditions affecting the lymphatic system, including lymphedema, lymphadenitis, and lymphangitis.Compare with other Lymphatic Disorders specialists.

Typically treats 71% more than their peers

Based on claims data for 6 conditions and procedures

TreatmentsTreatment Frequency
Non-Hodgkin's Lymphoma
very high
very high

Treatment Frequency

Dr. Seymour treats Non-Hodgkin's Lymphoma more than 97% of their peers

Dr. Seymour treats this condition more than 97% of their peers

Lymphocytosis
very high
very high

Treatment Frequency

Dr. Seymour treats Lymphocytosis more than 93% of their peers

Dr. Seymour treats this condition more than 93% of their peers

Lymphoma, Large-Cell
high
high

Treatment Frequency

Dr. Seymour treats Lymphoma, Large-Cell more than 85% of their peers

Dr. Seymour treats this condition more than 85% of their peers

Blood Cancers

Blood cancer specialists diagnose and treat cancers such as leukemia, lymphoma and myeloma that affect the blood cells, bone marrow, or lymphatic system.Compare with other Blood Cancers specialists.

Typically treats 60% more than their peers

Based on claims data for 8 conditions and procedures

TreatmentsTreatment Frequency
Non-Hodgkin's Lymphoma
very high
very high

Treatment Frequency

Dr. Seymour treats Non-Hodgkin's Lymphoma more than 97% of their peers

Dr. Seymour treats this condition more than 97% of their peers

Lymphoma, Large-Cell
high
high

Treatment Frequency

Dr. Seymour treats Lymphoma, Large-Cell more than 85% of their peers

Dr. Seymour treats this condition more than 85% of their peers

Reticulosarcoma
normal
normal

Treatment Frequency

Dr. Seymour treats Reticulosarcoma more than 82% of their peers

Dr. Seymour treats this condition more than 82% of their peers

Hide other practice areas

Check Dr. Seymour's experience treating your condition or procedure

Dr. Seymour's conditions and procedures:

  • Acute Leukemia
  • Adrenal Gland Cancer
  • All Lymphoma
  • Anal and Rectal Cancer
  • Anal Cancer
  • Anal Disorders
  • Anemia
  • Antiphospholipid Syndrome (APS)
  • Aplastic Anemia
  • Autoimmune Diseases
  • Bile Duct Cancer
  • Bladder Cancer
  • Bleeding Disorders
  • Blood Disorders
  • Blood Disorders in Pregnancy
  • Bone Cancer
  • Bone Disorders
  • Bone Marrow Aspiration
  • Bone Marrow Biopsy
  • Bone Marrow Disorders
  • Brain Cancer
  • Brain Disorders
  • Breast Cancer
  • Breast Cancer Treatment
  • Breast Diseases
  • Cancer
  • Cancer Counseling
  • Cancer Pain
  • Cancer Treatment
  • Cancer Treatment Complications
  • Carcinoma in Situ
  • Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
  • Central Nervous System Lymphoma
  • Cervical Cancer
  • Chemotherapy
  • Cholangiocarcinoma
  • Chronic Inflammatory Demyelinating Polyneuropathy
  • Chronic Lymphocytic Leukemia
  • Chronic Myeloid Leukemia (CML)
  • Clotting and Bleeding Disorders
  • Coagulation Disorders (incl. Hemophilia)
  • Colon Cancer
  • Colorectal Cancer
  • Connective Tissue Disorders
  • Coumadin® Management
  • CT Scan (Computed Tomography)
  • Deep Vein Thrombosis (DVT)
  • Esophageal Cancer
  • Esophageal Diseases
  • Eye Cancer
  • Fallopian Tube Cancer
  • Familial Polyposis
  • Gallbladder and Biliary Tract Cancer
  • Gallbladder Cancer
  • Gastrointestinal Diseases
  • Genitourinary Cancers
  • Gynecologic Cancer
  • Head and Neck Cancer
  • Hematologic Disorder Treatment
  • Hematologic Problems
  • Hemochromatosis
  • Hemophilia
  • Hodgkin's Disease
  • Hypercoagulable State
  • Immune Thrombocytopenic Purpura (ITP)
  • Infusion Therapy
  • Intrathecal Chemotherapy
  • Kaposi's Sarcoma
  • Kidney Cancer
  • Laryngeal Cancer
  • Larynx Conditions
  • Leukemia
  • Leukocytosis
  • Liver Cancer
  • Lump
  • Lung Cancer
  • Lung Cancer Treatment
  • Lymphadenopathy 
  • Lymphocytosis
  • Lymphoma
  • Lymphoma, Large-Cell
  • Macroglobulinemia (incl. Waldenstrom's )
  • Male Hypogonadism
  • Malignant Neoplasm of Gastrointestinal Tract
  • Mantle Cell Lymphoma
  • Marginal Zone Lymphoma
  • Mass
  • Mediastinal Cancer
  • Melanoma
  • Multiple Myeloma
  • Myelodysplastic Syndromes
  • Myeloma
  • Myeloproliferative Disorders
  • Neuroendocrine Tumors
  • Neutropenia
  • Nodular Lymphoma
  • Non-Hodgkin's Lymphoma
  • Oral Cancer
  • Osteosarcoma
  • Ovarian Cancer
  • Ovarian Tumor
  • Pancreatic Cancer
  • Pancytopenia
  • Pernicious Anemia
  • Pleura Cancer
  • Pleural Cancer
  • Polycythemia Rubra Vera
  • Primary Central Nervous System Lymphoma
  • Primary Hypercoagulable State (incl. Factor V Leiden Disease)
  • Prostate Cancer
  • Pulmonary Disease
  • Purpura
  • Qualitative Platelet Defects (incl. Glanzmann's Thrombasthenia)
  • Reticulosarcoma
  • Retina Diseases
  • Salivary Gland Cancer
  • Secondary Hypertension
  • Secondary Malignancies
  • Sickle Cell Disease
  • Skin Cancer
  • Soft Tissue Sarcoma
  • Squamous Cell Carcinoma
  • Stomach and Small Intestine Cancer
  • Stomach Cancer
  • Stomach Diseases
  • Testicular Cancer
  • Thalassemia
  • Thoracentesis
  • Throat Cancer (Oropharyngeal)
  • Thrombocytosis
  • Thrombosis
  • Thyroid Cancer
  • Tongue Cancer
  • Tumor
  • Urinary Disorders
  • Uterine Cancer
  • Uterine Diseases
  • Vascular Disease
  • Venous Embolism and Thrombosis
  • von Willebrand Disease
  • Vulvar Cancer

About Me

Millennium Physicians is a multi-disciplinary medical group that offers a singular source for patient healthcare needs. Our practice is a diverse group of 32 physicians at 11 different locations in the Greater Houston area. Millennium Physicians is here to treat with the highest level of care and get patients back living life to the fullest.

Specialties

  • Medical Oncology
  • Hematology

Education

Univ of Tex MD Anderson Cancer Center
Fellowship Hospital
2000
Baylor College of Medicine
Residency Hospital
1997
St Lukes Episcopal Hospital
Internship Hospital
1992
University Of Miami Ohio
Undergraduate School

Frequently Asked Questions

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Affiliated Hospitals

Check the quality of care at hospitals where Dr. Seymour treats patients.

Learn more

HCA Houston Healthcare Northwest

Houston, TX

64% Patient experience rating, 5% lower than the national average

  • Patient Safety Excellence Award™ (2019, 2018)

HCA Houston Healthcare Kingwood

Kingwood, TX

68% Patient experience rating, 1% lower than the national average

HCA Houston Healthcare Tomball

Tomball, TX

61% Patient experience rating, 8% lower than the national average

CHI St. Luke's Health - The Vintage Hospital

Houston, TX

74% Patient experience rating, 5% higher than the national average

  • Patient Safety Excellence Award™ (2018)

CHI St. Luke's Health - The Woodlands Hospital

The Woodlands, TX

73% Patient experience rating, 4% higher than the national average

Huntsville Memorial Hospital

Huntsville, TX

56% Patient experience rating, 13% lower than the national average

Memorial Hermann - Texas Medical Center

Houston, TX

78% Patient experience rating, 9% higher than the national average

  • America's 250 Best Hospitals Award™ (2018)

Memorial Hermann Healthcare System - Southwest

Houston, TX

73% Patient experience rating, 4% higher than the national average

  • Patient Safety Excellence Award™ (2020, 2019, 2018)
  • America's 250 Best Hospitals Award™ (2018)

Memorial Hermann Northeast Hospital

Humble, TX

72% Patient experience rating, 3% higher than the national average

  • Patient Safety Excellence Award™ (2020, 2019, 2018)

Memorial Hermann The Woodlands Hospital

Shenandoah, TX
  • Patient Safety Excellence Award™ (2020, 2019, 2018)
  • America's 250 Best Hospitals Award™ (2018)